cushing p e (7 Ergebnisse)

Soft cover. Zustand: Very Good. Softcovers; ex-library; minor shelfwear; o/w in very good condition. Book.

No Binding. Zustand: Good. ORIGINAL PUBLICATION; disbound from NY State Museum Report; it is missing the folded map of New York; no covers; light browning of leaves; light creasing of upper corner of leaves; o/w in good condition. Book.

Zustand: NEW. 224, 115 col illus. . PB. NEW. . Covers spiders that live in our houses and apartments as lodgers. Mostly ignored and sometimes (wrongly) feared, there is hardly a building in the world that does not harbour some species of spider. What is fascinating is that we always find the same species. These spiders must have special adaptations, because the humidity in our homes is far too low, they are too clean, and the food supply is usually scarce. However, those spiders that have made the leap into our four walls are rewarded with a worldwide right to stay. This, in turn, is due to people's eagerness to trade and migrate worldwide: Humans tirelessly transport their belongings and an endless stream of goods around the world in sacks, parcels and containers. And our domestic spiders, as stowaways, travel just as tirelessly and unrecognized. It is therefore possible to present domestic spiders found throughout the world in a single book, as they are essentially the same everywhere. The 50 or so most important species and species groups are presented here in a generally understandable way, with a detailed profile, photos and distribution maps.The authors of this book are experts who work at museums, universities and in administration in Europe and North America. They are not only recognized scientists, but have also been avowed spider fans for decades. [9783031704475].

Zustand: Very Good. 377, 1400 line drawings. . PB. Spiral binding. Vg. 1st edition. This illustrated guide to the spider genera of North America, north of Mexico, provides over 1400 illustrations and keys to the genera in 68 spider families. Over 550 genera are included. [9780977143900].

In the family Uloboridae, web reduction is associated with changes in web monitoring posture and prosomal features. A spider must extend its first pair of legs directly forward to monitor the signal line of a reduced web. This posture is facilitated by shifts in prosomal musculature that cause reduced web uloborids to have a narrower anterior prosoma, a reduced or absent anterior eye row, and prominent posterior lateral eye tubercles. The eye tubercles and larger posterior eyes of these uloborids suggest that web reduction may also be accompanied by ocular changes that compensate for reduction of the anterior eyes by expanding the visual fields of the posterior eyes. A comparison of the visual fields of the eight-eyed, orb web species Octonoba octonaria and a four-eyed, reduced web Miagrammopes species was made to determine if this is true. Physical and optical measurements determined the visual angles of each species' eyes and the pattern of each species' visual surveillance. Despite loss of the anterior four eyes, the Miagrammopes species has a visual coverage similar to that of O. octonaria. This is due to (1) an increase in the visual field of each of the four remaining Miagrammopes eyes, accruing from an extension of the retina and an increase in the lens' rear radius of curvature, and (2) a ventral shift of each visual axis, associated with the development of an eye tubercle and an asymmetrical expansion of the retina. Miagrammopes monitor their simple webs from twigs or moss where they are vulnerable to predation. Therefore, maintenance of visual cover may enable them to detect predators in time to assume or maintain their characteristic, cryptic posture. It may also allow them to observe approaching prey and permit them to adjust web tension or prepare to jerk their webs when prey strikes. 6 pp., 3 figs, 4.

Soft cover. Zustand: Very Good. Duperre, N. (illustrator). Softcover; ring bound; 4to; 377 pages. Black card softcover. Scuffed bottom cover. The pages are bright and clean. VG. Book.

J. Hist. Med., 1/ 2. - New York, Herny Schuman, 1946, 8°, pp.189-351, 3 Bl., zahlr. Abbildungen, orig. kartonierter Einband. Contents - Goldschmidt, E.P.: Recollections of Harvey Cushing and his book-collection; Weil, E.: The formation of the Harvey Cushing Collection; Jefferson, G.: Harvey Cushing and his books.