ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 437 



above, the deep-water Lithodidae having been previously dealt with. 

 At the end there is a table of the genera and species of recent Paguridea. 



New Species of Cymonomus.* — A. Alcock describes Cymonomus 

 aadamanicus sp. n., a small, blind, deep-sea crab, belonging to the 

 Oxystome family Dorippidae. He also discusses the geographical dis- 

 tribution of the family, which raises some interesting inquiries ; and has 

 some remarks to make on the allied genus Gymonomops. 



Life of Salt -Marsh Amphipod.f— Mabel E. Smallwood gives an 

 interesting account of the behaviour of Orchestia palustris from the salt 

 marsh of Cold Spring Harbor. Both their colour and their shape when 

 quiet are highly protective. Adults were mating and carrying young 

 during July and August. The male carries the passive female for hours 

 or even days during the mating period, a habit found in many aquatic 

 forms and retained by this terrestrial one. 



They swim and slide around on one side, they also hop, not as often 

 nor as far as Tal orchestia longicornis, but with more judgment, and they 

 run well and rapidly. 



They orient readily in response to gravity ; they are photokinetic, 

 and usually negatively phototactic ; they are very sensitive to contact. 

 They can endure great variations in salinity and humidity. They eat 

 any waste organic matter. They do not burrow, but rest in accidental 

 crevices, depressions, or frail, dome-covered excavations. Their chief 

 animal enemies are probably little fishes, birds, spiders, and beetles. 



We have here a fine example of a simple etiological memoir. 



Fresh-water Plankton Crustacea.^ — V. Brehm and E. Zederbauer 

 report on the Plankton of Alpine lakes, and, inter alia, direct attention 

 to the differences in the size of Bosmina coregoni in September and in 

 December, and to the marked age-variations and seasonal variations 

 in the head-region of (Hyalo-) Daphnia cucullata Sars. 



So-called " Olfactory SetaB " of CladoceraJ— D. J. Scourfield dis- 

 cusses the varied structure, size, and distribution of the chemically- 

 sensitive setae in different types of Cladocera, and notes especially their 

 frequently greater development in the males. He regards them not 

 merely as gustatory, but as organs of a more generalised chemical sense. 



Fixation of Lernseenicus Sardinae.|| — Marcel Baudouin gives a 

 precise account of the manner in which this parasitic Oopepod fixes itself 

 on the dorsal surface of the sardine, near the middle lateral region of 

 the dorsal fin. The actual fixing is effected by the cephalothorax, but 

 after insertion the cephalothorax and the tail disappear in the muscle, 

 leaving the swollen genital region, which has a red colour. 



* Ann. Nat. Hist., xv. (1905), pp. 565-77 (1 pi.). 



t Cold Spring Harbor Monographs, iii. (1905) 21 pp.. 2 pla. and a map. 

 t Verh. Zool. Bot. Ges. Wien. lv. (1905) pp. 222-40 (7 figu.). 

 § Ploner Forschunga., xii. (1905) pp. 340-53 (2 pis.). 

 || Coniptea Rendus, cxl. (1905) pp. 32C-7. 



