CURRENT LITERATURE. I29 



ciicharidus ('"One day prior to Cli. o:i]ibiiC(na, Gude, which is the same species" 

 H. A. P. ill litt.), iSuccinea hira^ci, Uyclophorus hirasci, Pupinella oshimac, 

 Diplomviatina turris, D. saginata, D. oshimac, D. luchtiana and B. scpientrionalis. 



In the second paper, in which ilhistrations of some former species are given 

 in addition to those enumerated below, the following new species and varieties are 

 described : Daphnclla fragiUs v. articulala, Mitra (Costcllaria) hizenensis and 

 vanattai, Tritonidca suhmenkcana, Euthria Jiokkaidonin, Buccinxim hirasci, 

 Ccritkium chemnit-ianum, Syrnola bacillum, Eulim.a dunkcriana and luchuuna, 

 Assimmca angustata, Ncrita martcnsiana, N. hcJiciiioicl''s v. tristis, Lcptoihyra 

 rubra v. lacvicostata, Solen roscomaculatus, TclUna (Merisca) prist if or mis, 

 BuUminus rciaianus v. hokkaidonis, Ilandarina mandarina, v. 2^onderosa, 

 Trishoplita dacoslac v. awajiciisis, T. goodxvini v. strigata, Kaliclla suhcrenidata, 

 liodcnna and harimensis, Omphalotropis japonicus, Bithynia striatula v. japonica, 

 Sphac7'ium imitilis, Corbicida sadocnsis and aimjiensis. 



Pilsbry, Henry A. — The Land Mollusks of the Loo Choo Islands: Clausiliidac. 

 Ibid., pp. 409 — 424, pis. xxii, xxiii. 



The Loo Chooan Clausilia fall into five subgenera or sections, of which the 

 Luchuphccedusa, nov., has been found nowhere else. The following new forms are 

 now very fully described : Under the section Stercophacdusa, C. valida, Pfr. v. 

 perfasciuta; under Luchuphacdusa, C. callistochila, nesiothauma, oshimac, jjseudo- 

 shimac, and mima; under Hcmiphacdusa, C. crcnilabinia and munus. 



Smith, Edgar A. — On South African Marine Shells, with descriptions of new 

 species. Journ. of Conch., 1901, vol. x, pp. 104 — 116, pi. i. 



Smith, Edgar A. — A list of the VoluUdac of South Africa, with descriptions 

 of two new species of Voluta from Natal. Proc. Malac. Soc. Lond. , 1901, 

 vol. iv, pp. 231—235, 2 figs. 

 The new species are V. [Alcitltoc) ponsonhyi, and V. (Lyria) quckctti. 



Lillie, F. R. — The Organization of the Egg of ITnio, based on a study of its 

 Maturation, Fertilization, and Cleavage. Journ. Morph., 1901, vol. xvii, 

 pp. 227 — 292, pis. xxiv — xxvii. 



It is only possible in the brief space at our disposal to call attention to the leading 

 points in this valuable paper. After the entrance of the spermatozoon a sperm- 

 amphiaster is formed, which moves towards a definite zone and comes to rest. 

 Gradually this disappears, and at the same time the sperm-nucleus contracts. The 

 first maturation spindle is now entering on its metaphase. The second maturation 

 division having taken place, the sperm-nucleus grows in size synchronously with the 

 egg-nucleus and begins to describe its complicated copulation path, ultimately the 

 two nuclei come into contact at or near the centre of the egg. The first cleavage 

 spindle is then formed and moves axially to one end of the egg. All of these points 

 are discussed in great detail and beautifully illustrated; in addition to the author's 

 own observations, the literature and theories bearing upon the subject are dealt 

 with in a critical, yet careful manner. 



Godwin-Austen, H. H. — On the Anatomy of the Helix ampulla of Benson, and 

 its generic position in the Ariojihantinae. Proc. Malac. Soc. Lond., 1901, 

 vol. iv, pp. 187 — 190, pi. xviii. 



The author describes the external appearance of this interesting mollusc, also the 

 generative organs, free muscles, jaw, and radula. In its main characters he regards 

 it as agreeing with Nilgiria and Ariophanta. Certain characters, such as the jaw, 

 form of the central teeth, smooth foot-sole, pallial margin, and the shell, it does not 

 share with these genera, and they appear to the author sufficient data on which to 

 found a new sub-genus of the Ariophautiiiuc, to which he gives the name of IndrcUu. 



Godwin-Austen, H. H. — On \.he X\\a.\.omy oi IMix poUlissliua, Pfeifler, of Ceylon 

 and on its position in the Ariophantinae, Ibid., p, 261 — 263, pi. xxvi. 



