ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 497 



instances Hyal omnia agyptium L. to which enthusiastic discoverers of 

 species have given 28 other names ! He falls foul of Prof. A. Mac- 

 alister for an obiter dictum of 1871, and shows up F. Supino for even 

 greater transgressions in 181)7. 



Spiders of Germany.* — W. Bosenberg was able to complete his fine 

 monograph on the spiders of Germany before his death. The fifth and 

 sixth parts are now published, but the author died soon after the 

 appearance of the first. 



e. Crustacea. 



New Species of Sergestes.f — H. J. Hansen describes Sergestes 

 inermis sp. n., obtained by Mr. George Murray during the cruise of the 

 'Oceana' in 1898. It is rather closely allied to S. robustus Smith, but 

 seems quite distinct. 



New Genus of Copepod.J — W. G. Kidewood describes as Obesiella 

 lyonsiellce, g. et. sp. n., a new Copepod from the suprabranchial cavities 

 of the deep-sea Lamellibranch Lyonsiella. They were so closely packed 

 that the passage of water through the suprabranchial cavities must have 

 been a matter of considerable difficulty. All were females. Their most 

 remarkable feature is the great inflation and loss of external segmenta- 

 tion in the thoracic region, and the reduction in size of the thoracic 

 appendages. The head has the appearance of being provided with a 

 hood, owing to the presence of a dependent flap on each side. There 

 are no eyes. Six pairs of cephalic appendages are present, and four 

 thoracic. The abdomen is indistinctly divided into four segments, the 

 last bearing a pair of caudal rami, short and papilliform, with four or 

 five short setse. The mouth is extremely small, and set upon the 

 pointed summit of an oral cone, into the conformation of the sides of 

 which the third pair of appendages enter. The genus falls naturally 

 within the family Ascomyzontidas. 



Note on Phototropism of Daphnia.§— G. W. Kirkaldy calls atten- 

 tion to H. Schouteden's observations || which show that Daphnia magna 

 exposed to the action of light and able to choose between different 

 intensities, is at first positively phototropic — going towards the zone of 

 greater light, and then — as regards the adults — it gains the zone of less 

 illumination. As to the young individuals, they appear to have tend- 

 encies less precise ; nevertheless, the positive reaction is maintained in a 

 very great number of cases. Kirkaldy points out that the Belgian 

 zoologist has apparently overlooked the researches of Lubbock If upon 

 which considerable light is now thrown. 



Synopsis of British Fresh-water Cladocera.** — D. J. Scourfield has 

 made a useful list of these, with reference to Lilljeborg's monograph of 



* Zoologica, Heft 35 (1903) pp. 385-465 (7 pis.)- 

 t Ann. Nat. Hist., xi. (1903) pp. 479-81 (7 figs.). 

 X Journ. Linn. Soc, xxviii. (1903) pp. 463-5 (2 figs.). 

 § Journ. Quekett Micr. Club, 1903, pp. 465-6. 

 f| Ann. Soc. Entom. Belg., xlvi. (1902) pp. 352-62. 

 «|f Internat. Sci. Series, lxv., 3rd. ed., 1891, pp. 211-31. 

 ** Journ. Quekett Micr. Club, 1903, pp. 431-54 (1 pi.). 



