ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 1 i i 



to the fact that the male being apparently always smaller than the 

 female might be passed over as a younger specimen, and to the fact 

 that the distinctive first gnathopod (with a somewhat deep sinus on the 

 upper margin) seems to be habitually tucked away among the mouth- 

 organs when it is not in use. 



The author gives a synoptic table for the discrimination of Tritceta 

 gibbosa, Dexamine then, and D. spinosa, and notes that the first two are 

 widely distributed in the Clyde sea-area in depths up to 35 fathoms. It 

 is also shown that D. dolichonyx is the male of Tritwta gibbosa. 



Reduction of the Eye in New G-ammarid from Ireland.* — Fr. 

 Yejdovsky describes Bathyonyx de Vimesi g. et sp. n., discovered by 

 W. F. de Vismes Kane, from 130-150 ft. deep, in Lough Mask. It is 

 intermediate between Grangonyx and Gammarus, and is peculiarly in- 

 teresting in showing what may be regarded as the first stage in the 

 degeneration of the eye. 



Crustacea of East Norfolk Rivers.f — R. Gurney gives an interest- 

 ing account of the Crustaceans in the tidal regions of these rivers, 

 and shows that a number of marine forms have become habituated to 

 a considerable proportion of fresh-water. The brackish-water species, 

 Heterotanais gurneyi Norman, was found in abundance in fresh-water. 

 Good figures are given of Gyathura carinata Kroyer, a new record for 

 Britain. 



Notes on Development of Argulidse.ij: — C. B. Wilson gives for the 

 first time an account of the newly-hatched larvse of two of the common 

 American Avgulids, Argulus ftmduli, a salt-water form, and A. maculosus, 

 a fresh-water form. He also gives a description and figure of the male 

 of A . catostomi. In each case the form described is the only one needed 

 to complete a full account of the species. 



Nephrocytes of CaprellidsJ— L. Bruntz describes in Protella pkasma 

 three pairs of cephalic and six pairs of thoracic nephrocytes. There are 

 also nephro-phagocytes all along the thorax and above the heart. They 

 eliminate carminate of ammonia when that is injected into the general 

 cavity of the body, and they are able to capture particles of Chinese ink. 

 These cells and the blood-corpuscles are the only phagocytic elements in 

 Caprellids. There is no phagocytic organ analogous to that in 

 Gammarids. 



Antarctic Cirripedia.|| — A. Gruvel makes a preliminary report on 

 the operculate Cirripeds collected by the ' Gauss.' He notes Pachylasma 

 giganteum, from near the Cape of Good Hope, hitherto recorded only 

 from the Mediterranean, various species of Balanus, TubicincV a tracheal is, 

 Tetraclita porosa, and a single new species, EJminius crista} linns, so named 

 because of the transparent walls and opercular pieces. 



* Ann. Nat. Hist., xx. (1907) pp. 227-45 (2 pis.). 



t Trans. Norfolk and Norwich Nat Soo., viii. (1907) pp. 410-38 (1 pi. and 1 fig.).. 



J Proc. U.S. Nat. Museum, xxxii. (1907) pp. 411-24 (4 pis.). 



§ Arch. Zool. Exper., vi. (1907) Notes et Revue, No. 3, pp. lvi.-ix. 



|| Bull. Soc. Zool. France, xxxii. (1907) pp. 104-6. 



