The Journal of microscopy and natural science (1896) (14595499809)

Identifier: journalofmicrosc15post (find matches)

Title: The Journal of microscopy and natural science

Year: 1896 (1890s)

Authors: Postal Microscopical Society Wesley Naturalists' Society Allen, Alfred

Subjects: Microscopy Microscopes

Publisher: (London : W. P. Collins

Contributing Library: MBLWHOI Library

Digitizing Sponsor: MBLWHOI Library

Text Appearing Before Image:

ter it was hatched. How long they live in this formI cannot say. I placed all when hatched in a small tank withnothing but vegetable life, and found them alive on June the 20th.The larva is a pale yellow colour, with a bright red, double cres-cent-shaped patch on the body, as shown in Fig. 3, / the shadedportions representing the red colour. This is as far as my ownobservations at present have gone with the larva of Nescea. Genus IV.—Nes^a (Koch). 1842.—C. L. Koch, Ubersichi des Arachnidensysteins, No. 3, p. 10. Body, soft skinned; legs well supplied with swimming hairs ;claws to all tarsi. The tarsi and ungues of the male, and the thirdand fourth pairs of legs specially modified. On each side of thesexual fissure are six or more so-called genital pores, either sunkinto the skin or on special plates. The epunera form two separategroups on each side. Palpi not chelate; mandibles in two dis-tinct portions ; eyes wide apart. ----^TTT^- Journal of Microscopy, S^-^ Sen Vol. 6, Plate 6.

Text Appearing After Image:

Chas. D.Soar czd not. ae.. ,1/ / BRITISH HYDRACHNID.?*:. 147 Nes^a Longicornis. 1834—41.—Nescea longicornis, C. L. Koch, Deidschlands Crust., etc., p. 9, Figs. 14 and 15. Koch gives, in his Ubersicht, Nescea rosea as his type of Nescea(see Fab. I., Figs. 2 and 3). I have described and illustratedNescea longicornis because I happen to have a male and female ofthe same species. I have found several males of Nescea, but amat present uncertain with which females to pair them off. Mlilleralso figures longicornis on Twb. IV.. Fig. 4, and describes it onpage 47. Newman also gives N. longicornis, but I am not certainif it can be the same as the one described by Koch. N. longicor-nis is pale yellow in colour, with dark brown patches on the dorsalside, and a red Y-shaped mark in the centre, extending from justbehind the eyes to the posterior margin; in Kochs figure thismark is very plainly shown. The first three joints of the legs, counting from the body, arepale yellow, which gradually tur

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