CURRENT LITERATURE. I27 



Dall, W. H.— Synopsis of the Luclnacca and of the American species. Proc. U. 

 S. Nat. Mas., 1901, pp. 779—883, pis. xxxix— xlii. 



Continuing the series of valuable synopses of various groups of marine bivalves, 

 Dr. Dall here reviews the Luclnacca, which includes the following 5 families 

 Thyasiridae, Dipludontidac, Lucinidac, Corbklac, and CyreneUidae. Many radical 

 changes have been made by the author and the revision markes a considerable 

 advance. Seventeen new species are described and figured together witli figures of 

 other species. Vox the reception of Cryptodoii inosr/cyi and lur.onicus, E. A. Sm., 

 the author proposes a new genus under the name of J^adcinaria. 



Mitra, S. B. — The Crystalline Style of Lamellibranchia. Quart. Journ. Micro. 

 Sci. , 1901, vol. 44, pp. 591 — 602, pi. 42. 



After careful experiment and study, the author has arrived at the following 

 conclusions respecting the origin and function of the crystalline style. That it 

 is an active amylolytic ferment, secreted as a viscous liquid, most probably by ihe 

 so-called liver; that it is stored up as a flexible solid either in the caecum, or in 

 some compartment of the alimentary canal ; that the end projecting into the stomach 

 is slowly and gradually dissolved there, and mixed up with food-particles, trans- 

 forming the starchy portion into a reducible sugar. 



SykeS, E. R. — Conchology at the Dawn and Close of the Nineteenth Century. 

 Journ. Conch., 190I, vol. 10, pp. 35 — 42. 



This interesting address formed the Presidential Address (o the Conchological 

 Society of Great Britain and Ireland, at their Annual Meeting, October, 1900. 



SykeS, E. R. — Notes on the Genus Tcmrna, II. and A. Ad., with descriptions of 

 two new land-shells (Tcmcsa and Clausilia ) from South America. Proc. 

 Malac. Soc. Lond., 1901, vol. iv, pp. 220 — 222, figs, i — iii. 



The Exbalea peruviana, Philippi, is regarded as a synonym of T. chtiislliiildcs, 

 Rve. T. magmfica from Bolivia, and Clausilia pihhriji from Peru, are described as 

 new. 



SykeS, E. R. — The Zoological Record, 1900, vol. xxxvii. Record vii, Mollusca. 

 pp. I — 92, London, 1901. 



In view of the preparation of an index-volume to the 'Record,' tlie present 

 opportunity has been taken to include such genera, sections, etc., as have been 

 omitted in past year^. Further the somewhat lengthy paragraphs which now appear 

 under the heafling ' Geological,' have been under consideration, with a view to 

 breaking them up: tentatively the large group of 'Ternary' has been divided 

 geographically by continents. 



Record vii maintains the high standard to which the present Recorder, his 

 associates, and predecessor have brought this invaluable woik. 



Prowazek, S. — Spermatologische Studien. I. Spermatogenese der Weinbeig- 

 schnecke (JIcllx poiiiatla, L,. ). Arbeit Zool. Inst. Wien., 1901, T. xiii, 

 pp. 197 — 222, Taf. xi u. 2 textfiguren. 



The author describes and figures in great detail the various stages in the develop- 

 ment of the spermatozoa of this species. 



Coekerell, T. D. A. — On a slug of the genus IVrunlcclla from Tahiti. Proc, 

 U. S. Nat. Mus., 1901, vol. xxiii, pp. 835, 836. 



Veronkclla agassizl, n. sp. "Length, about 21 mm.; breadth 9^; breadth f)f 

 sole 3 ; female orifice from sole 2, from margin, scarcely 2, from anterior end about 

 II mm. ; these measurements all from a dried individual. Dorsal surface granular 

 with small warts ; colour, coffee-brown marbled with black ; no dorsal band. 

 Under surface whitish. Anatomy not determinable from the material available." 



Hah. — Tahiti, Tipaerui \'alley. 



This species is apparently nearly related to /'. ijilsoni, Cllge., from the I'iji 

 Islands, differing in the broader sole and position of the female generative orifice. 



