THE NAUTILUS. 83 



proposed the name Bathyaxis for Coeliaxia layardi Ad. & Aug., 

 which is, as Mr. Hedley has stated, the type of the genus Coeliaxis! 



Species identified. From L'Abbe P. A. Begin, Sherbrooke, 

 Prov. Quebec, Canada. 1, Goniobasis livescens Mke, var. 2, 

 Physa ancillaria Say. 3, Lhnucza catascopium Say. 4, Sphceriuvi 

 striatwitm Lam. 5, Aplexa hypnorum Linn. 6, Planorbis bicar- 

 inatus Say. 7, Campeloma Integra Say, young specimens. 8, Physa 

 heterostropha Say. 9, Ferussacia subcylindrica Linn. 10, Helix 

 albolahris Say. — H. A. P. 



CoNCiiOLOGisTS who do not already possess a copy of Tryon's 

 " Structural and Systematic Conchology " should procure it 

 now. This work is indispensable to the collector who wishes 

 to gain an intelligent idea of the affinities or structure of shells, or 

 to classify a collection. The plates illustrate thousands of species 

 representing all of the genera and subgenera, and the text contains 

 interesting chapters on geographical and geological distribution 

 structure, classification, etc. It is the most complete text book on 

 the subject in the English language. 



Note on Lyogyrus. In our article upon this genus in the 

 October Nautilus, we intended to mention all of the described 

 species. ]\Ir. Ford has called our attention to the fact that Lyogyrus 

 Brownii Carpenter was omitted, — an oversight naturally very 

 annoying to the author, and of course purely unintentional. This 

 form was described some years ago by Mr. H. F. Carpenter, the 

 well-known writer upon New England and especially Rhode Island 

 shells. It is allied to L. pupoides Gld., differing from that species 

 in having the body-whorl not free from the preceding, or only 

 slightly so, whilst in the typical pupoides it is decidedly separated. 

 The two should be carefully compared with a large mass of material, 

 in order to ascertain whether they intergrade. In both, the spire 

 is very much higher and more conical than in the L. Dallii. — H. 

 A. P. 



Instructions for collecting Mollusks and other useful 

 Hints for the Conchologist, is the titleof a pamphlet of fifty-six 

 pages, issued by the U. S. National Museum, and which can be 

 obtained by application to the Director of that Institution. The 

 author, Dr. Wra. H. Dall, has embodied in it a large amountof most 

 useful information on methods of collecting mollusks of all sorts, 

 land, fresh-water and marine, the chapter on dredging and the con- 



