CURRKXT LITERATURE. 73 



Sykes, E. R. — On the Polyplacophora. In Herdman, Report . . on the Pearl 

 Oyster Fisheries of the Gulf of Manaar. Part I, Suppl. Rep. iv, pp. 177 — 180, 

 pl. i. London, 4 to, 1903. 

 The collection includes nine species. Of these, three are identified (one doubtfully) 



with known forms ; one species of Callocliiioii, three of Iscliiiockitoii, and one of 



Tonicia, are new. 



Sykes, E. R. — Zoological Record, 1903, vol.xl. Div. vii. Mollusca. London : July 1904. 



This invaluable work reaches us considerably earlier than in previous years, and 

 although possibly not quite so complete as in former years, it is a great advantage to 

 have the same so promptly. 



So far as the general Record is concerned there are no salient alterations, but the 

 cross references are perhaps not so complete as in previous issues. 



PallaPy, Paul. — Additions a la faune conchyliologique de la Mediterranee. Ann. 

 Mus. d'Hist. Nat. Marseille — Zoologie — 1903, T. viii, pp. 5 — 16, pl. i. 



Pallary, Paul. — Quatrieme contribution a I'etude de la faune malacologique du Xord 

 -Oueste de I'Afrique. Journ. de Conchyl., 1904, vol. lii, pp. 5 — 58, pis. i — iii. 



In this interesting memoir the author describes and figures a peculiar Paniiacclla- 

 like shell for which the genus Vaiicheria is established. V. tiiit^ilaiia, the type, is 

 known from the shell onlj', which is de.xtral and larger than any known form. It is to 

 be hoped that Mr. Pallary will ultimately succeed in finding the living animal. 



Many new species of Hcli.v are described and figured, as well as new species of 

 Limnaea, Valvata, and Melanopsis. 



Hoyle, W. E. — A Diagnostic Key to the Genera of Recent Dibranchiate Cephalopoda. 

 Mem. and Proc. Manchester Lit. and Phil. Soc, 1904, vol. xlviii. No. 21, pp, i — 20. 

 What must prove a most useful aid to workers on the recent Dibranchiate Cepha- 

 lopoda, has been drawn up by Dr. Hoyle in preparation for a systematic account of 

 the recent Cephalopoda to be published in the '" Tierreich " of the German Zoological 

 Society and Berlin Academy. 



Eliot, C — On some Nudibranchs from East Africa and Zanzibar. Part III. Proc. 

 Zool. Soc. Lond., 1904, pp. 354 — 385, pis. xxxii — xxxiv. Part IV. Ibid., pp. 380 — 

 406, pis. xxiii, xxiv. 



The author, in these two papers, treats of the Cryptobranchiate Dorids, which are 

 represented by 49 species of which i genus and 25 species are new. In examining 

 the value of the chief points by which the sub-familics and genera under consideration 

 can be differentiated, it is pointed out that such characters as the rhinophores and 

 branchial and the generative organs are disappointing as a means of chibsification ; 

 while the characters of the dorsal surface and general texture, the foot, and the mouth 

 parts are regarded as forming a fairly good indication of relationship. The internal 

 organs, in the author's opinion do not offer many features which serve for the purpose 

 of classification. 



Bartseh, Paul. — A new Ashmuudla from New Mexico. Smithsonian Miscell. Coll., 

 1904, vol. 47, pp. 13, 14. 

 AshuiuneUa townsciidi, n. sp., is most nearly related to A. rliyssa, Dall, but is 

 much smaller than that form and is uniformly more strongly sculptured. Loc. Ruidoso, 

 New Mexico. 



Hyde, Ada H. — The Nerve Distribution in the Eye of Pcdeii irmdiaus. Mark 

 Annivers. Vol., 1903, pp. 471 — 482, i pl. 



Hyde, Ada H. — The Retinal Nerve-ending in the "Eye oi Pecicu. Biol. Bull., 1904, 

 vol. 6, p. 317. 



