The Annals and Magazine of Natural History: Including Zoology, Botany, and Geology

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Taylor & Francis, Limited, 1900 - Natural history
 

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Page 480 - The evidence of the collections is sufficient to show that a Neocomian limestone occurs both on the summit of the Somali plateau and on the floor of the Guban, and that some marine limestones of Lower Tertiary age (probably Eocene) also occur on the plateau. It is therefore evident that the foundering of the Aden Gulf is postEocene in age. 2. ' Note on Drift-gravels at West Wickham (Kent).
Page 189 - I was unable to detect that the females displayed any unusual aversion toward their effeminatelooking consorts. It is also interesting to note that normal males pay no attention to males with female wings. In another series of experiments the wings were cut entirely off of males and females and the scales brushed off of their bodies ; and yet these shabby males were readily accepted by normal females, nor could I see that normal males displayed any aversion to mating with wingless females.
Page 189 - In order to test this hypothesis I cut off the wings of a number of females, leaving only short stumps, from which all the scales were carefully brushed. Male wings were then neatly glued to the stumps and thus the female presented the appearance of a male. Under these circumstances the males mated with the females quite as readily as they would have done under normal conditions.
Page 189 - ... Robert W. Fuller, who provided me with the reagents used in the manufacture of ethyl mercaptan. Summary of Conclusions. The male is positively chemotactic toward some substance •which emanates from the abdomen of the female, and which he perceives through olfactory organs situated upon his antennae. Females thirty to sixty hours old are much more attractive to males than are young females five to ten hours old. Virgin females are somewhat more attractive than are fertilized ones of the same...
Page 57 - Notes on the fishes collected during the Swedish Arctic Expedition to Spitzbergen and King Charles Land 1898.
Page 203 - It is a curious fact that the Amphipoda met with at these great banquets, so far as I have seen, are mostly of one species. Sometimes they are exclusively Tryphosa nanoides, or at other times wholly Lafystius sturionis, Orchemenella nana (=ciliata)i or Callisoma crenaium. Whether each species has its own particular prey, or whether the weaker species give way to the stronger, cannot easily be proved.
Page 189 - We are therefore forced to conclude that the melanic coloration of the male has not been brought about through the agency of sexual selection on the part of the female. In this connexion it is interesting to notice that Plateau (1897) concludes that insects are attracted only by the odours of flowers, and not at all by their colour. In conclusion, it gives me great pleasure to express my gratitude to Miss Caroline G. Soule for advice and aid ; to WL Tower, Esq., for his kindness in collecting many...
Page 20 - Ocelli in an equilateral triangle, the latter separated from each other by the same distance they are from the eyes.
Page 189 - The male will mute at least four times, either •with the same or with different females. Neither males nor females pay any attention to the coloration of their partners.
Page 137 - The peduncles of the uropoda are longer than the rami V. Kroyerii, Bov. Respecting the uropoda, Bovallius has taken the character of V. borealis from B. & W.'s woodcut, and while he has adopted the generic characters, in certain respects he has taken no notice of the statement " Three posterior pairs of pleopoda with the peduncle long and the rami short and compressed.

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