8 THE NAUTILUS. 



GENERAL NEWS. 



POLYGYRA THYROIDES SANCTisiMONis n. var. Spire more conic 

 than in thyroidcs, composed of 5g whorls which are more closely 

 coiled ; body-whorl decidedly more depressed ; umbilicus open. 

 Aperture smaller than in thyroides, transversely elliptical, being 

 much less rounded than in thyroides. Shell rather solid, with opaque 

 cuticle, often more yellow than in thyroides. Alt. 15, diam. 23 mm. 

 St. Simon's Island, Georgia. H. A. PILSBRY. 



HELICOSTYLA CARINATA Lea, and H. DACTYLUS Brod. In the 

 Manual of Conchology, viii, p. 22, I showed that Lea's Bulimus cari- 

 iidhis is identical with and was published prior to Bulinus dactylus 

 Brod., and consequently should be accepted in place of the latter. 

 This decision must now be reversed, on account of the earlier Buli- 

 mus cnriuolus Perry, 1.811, which preoccupies Lea's name, and which 

 I was not aware of when the ruling was made. H. A. PILSBRY. 



NOTE ON TWO SPECIES OF CANTHARIDUS. It has not been 

 noticed, I believe, that Bulimus eximus Perry, Conchology, pi. 30, 

 f. 2 (1811), is identical with Cautharidus bad-ins Wood (18 ), and 

 Bulimus carinutus Perry, f. 1, is C. peronii Phil. (1850). Perry's 

 figures are very good, for him, and quite recognizable. He gives 

 Van Diemen's Land as locality for the former, New Holland for the 

 latter species. So far as I can see, his names will stand for these 

 species H. A. PILSBRY. 



AMIMIIHROMUS LJSVUS (Mull.). In my account of this species in 

 the Manual of Conclioloyy (1900) the "Helix Iseva" of Miiller was 

 called Ampkidromus Isevis. Mr. G. H. Chadwick has called my 

 attention to the mistake, Miiller's word being the adjective Jsevus, 

 left, referring to the sinistral or " left-handed " coil of the shell. 

 H. A. P. 



A NEW TRIASSIO CHITON. Mr. Otto Jaekel describes (Zeitschr. 

 del- Deutschen geologischen Gesellschaft, vol. 52, 1900, p. 9) a new 

 form from Riidersdorf as Trachyphura triadomarchica. All of the 



