— 85 — 



tion of a new Species [T. acuticoslala u. sp., Philippines] 

 (Fig.). — G. C. RoBSON. On a case of presumed Viviparily in 

 Limicolaria. — ^^ . H. Dall. Note on the Genus Panope Me- 

 nard. — A. J. Jukes Browne. The >onienclature of Ihe 

 Veneridœ :a reply to Dr. W. H. Dall. — A. W . Stelfox. The 

 occurrence of HeliceUa heripensis (Mabille) in Great Britain 

 (PI. II). — A. W. Stelfox. Notes en some British Non-marine 

 Mollusca (PI. II). — H. C. Burnup. On the occurrence of Pii- 

 pisoma in South Ai'rica. 



The Journal of Conchology. Editoi- : ,1. H. Le B.Tomlin. 



Vol, \11I, n" 9, January 1912. 



Contents : J. R. Le B. Tomlin. Succinea eie(ians Risso new to 

 the Oi'kneys. — Chas. Oldiiam. Vertigo angustior Jeff. in 

 Hertfordshire. — .L W . Taylor. Biology of the Mollusca : 

 based chietly upon astudy of one of our commonest species, 

 Hélix aspersa. — J. R. Le B.Tomlin. Pisidiuin Lilljeborgi Cles- 

 sin in the Isle of Skye. — J. E. Cooper. Association of Ancylns 

 fluviatilis and Velleiia lacustris. — W. H.FoxALLandH. Over- 

 TON. Pseudanodonta rothomagensis Loc. in Britain. — C. Tn. 

 Cribb. Clausiliabidentatam. dextrorsuin at Skipton. — J.R.B. 

 Masefield. Testacella in Staffordshire. — H. Overton. On the 

 Occurrence of Clausilia dubia Drap, in Kent. 



The Xautilus, a monthly devoted to the interests of Con- 

 chologists. Editors : H. A. Pilsbry and C. ^^ . Johnson. 



Vol. \\V, n° 9, January 1912. 



Contents : A. E. Ortmann and Bryant W alker. A New 

 North American Naiad [Arkansia (nov.gen.) V17îee/cr/u. sp.] 

 (PL VIII). — A. E. Ortmann. The Anatomy of the Naiad Hy- 

 l'idella aiistralis (Lmk.) {^= Diplodon austr(dis) (Fig.). — 

 V. Sterki. MuscuUiini déclive u. sp. [Michigan]. — W . F. 

 Cl\pp. Collecting from Haddoch on the George's Banks. — 

 O. 0. -Nylander. Limnœidœ of Aroostook County, Maine. — 

 A. A. HiNKLEY. Notes on Physa gyrina. 



Vol. X\V, u" K), February 1912. 



Contents :(4i.\V. Johnson. Note on the Variation oîStruin- 



