CURRENT LITERATURE. 1 73 



approach most nearly to those of A. Icrefftii, Kfst. (cf Zeit. f. wiss. Zool., 1865, 

 Bd. XV, pp. 76 — 85, T. vi), although there are many important differences. — 



W. E. C. 



Drew, G. A, — Locomotion in Solcnomya and its relatives. Anat. Anz., 1900, 

 Bd. xvii, pp. 257 — 266, figs. I — 12. 



Dr. Drew gives an interesting account of the movements of burrowing and the 

 musculature involved, in Nucula, Yoldia, and Solenomya. Taking Yoldia as an 

 example, the movements and muscular systems being similar in all three genera, the 

 various movements concerned in burrowing are explained, also those of leaping, 

 whilst in Solenomya a third method of locomotion is described, that of swimming, 

 which is effected by the expulsion of strong jets of water through the posterior 

 opening of the mantle chamber. Possibly these jets are of use in cleaning the 

 mantle chamber and burrow, and the animal has made use of them secondarily as a 

 means of locomotion. — W. E. C. 



DautzenbePg", Ph., et Fischer, H. — Description d'un mollusque nouveau. 

 Bull. Soc. Zool. France, 1899, T. xxiv, pp. 207 — 209, figs. 



The shell here described belongs to an exceedingly interesting mollusc, which is 

 described by Prof. Pelseneer. Large numbers were found attached to a fragment 

 of the beak of a Cephalopod, dredged off the Azores at a depth of 1557 metres, by 

 the "Princess Alice." Bathysciadiitm conicuni, n. g. et. s})., is the name given 

 to this mollusc, and it is placed in a new family — Bathysciadidae. — W. E. C. 



Pelseneer, P. — Note sur I'organisation du genre Bathysciadium. Bull. Soc. 

 Zool. France, 1899, T. xxiv, pp. 209 — 211, figs. I — 3. 



Prof. Pelseneer gives an interesting account of the structure and afirnities of 

 B. conicum. No trace of eyes, gills, or ctenidia were found. The nervous system 

 is similar to that of the Patellidae. There are two otocysts, each containing a 

 single spherical otolith. The radula is very long and has i median, 3 lateral, and i 

 marginal tooth on each side. The heart has a single auricle. There are two 

 nephridia, that on the left side being much larger than is usual in the Patellidae. 

 The species is regarded as hermaphrodite, but so exceptional a condition requires 

 further confirmation. There is a long cephalic appendage, which is thought to be a 

 copulatory organ. While possessing the general characters of the /"flic^^i'ttoe, it is 

 distinguished from all the existing families by the remarkable otocysts, the her- 

 maphrodite condition, and the form of the radula. — W. E. C. 



Melvill, J. Cosmo.— A Revision of the Textile Cones, with description of C. 

 chulmondcleyi, n.sp. Journ. Conch., 1900, vol. ix, pp. 303 — 311, i fig. 



No one is more competent than Mr. Melvill to treat of the subgenus Cylinder, 

 Mont., and in the paper before us he gives a very useful revision of the 45 known 

 forms. C. cholmondrlcyi is described as a new species, which hitherto has been 

 confused with C. pyrariiidalis, Lam. In its markings it somewhat resembles C. 

 corhula, Sby., or C. eiictrios, Sby. The type is in the Manchester Museum. — 



W. E. C. 



SykeS, E. R. — Fauna Hawaiiensis, 1900, vol. ii. Mollusca. With Intercala- 

 tions on Anatomy by Lt.-Col. (jodwin-Austen. pp. 271 — 412, pis. xi — xii. 



Mr. Sykes has here given an extremely valuable account of the Land and Fresh- 

 water Mollusca of the Hawaiian Islands. He is of opinion that the fauna is nearly 

 related to that of the Polynesian Islands, showing little trace of any continental 

 influence, Asiatic or American. In nearly all cases the species are confined to one 

 island. By a series of tables it is shown that 50 species are peculiar to Kauai, 175 

 to Oahu, 44 to Moiokai, 25 to Lanai, 64 to Maui, and 37 to Hawaii. 



Turning to the Systematic portion, 476 species and 30 varieties are enumerated. 

 Godwinia is a new genus proposed for the Vitrina caperata of Gould. Philonesia, 



