334 PROCEEDINGS OF THE NATIONAL MUSEUM. vor. 58. 



height of shell, 26; of last whorl, 20; diameter, 15 ram. U. S. Nat. 

 Mus. Cat. No. 46729. 



Type-locality. — ^Monterey, California, Stearns. 



TRITONALIA CIRCUMTEXTA, new variety CITRICA. 



This is a variety which, when fresh, presents a ground color of 

 lemon or orange yellow instead of the usual grayish white, vv'hile 

 the brown bands are much less emphatic and the shells are usually 

 smaller than those of the type. Museum specimens, number 56747 

 from Catalina Island, may be regarded as the types. 



TRITONALIA INTERFOSSA, new variety CLATHRATA. 



This is a short and stout form with very prominent rectangular 

 clathration and flatly turrited spire, v/hich was distinguished by 

 Dr. R. E. C. Stearns in manuscript many years ago but never pub- 

 lished. The specimen from Avalon, Catalina Island, numbered 

 17799.5 in the museum series, may be taken as type. Height, 13: 

 diameter, 7 mm. 



TRITONALIA INTERFOSSA, new variety MINOR. 



This is a pale dwarf, slender form, also from Catalina Island, 

 number 56912, which seems nevertheless to have reached maturity. 

 It is strongly clathrate and measm-es in height 7, and in diameter 

 3.5 mm. 



TRITONALIA INTERFOSSA, new variety ATROPURPUREA. 



This form resembles clathraia, but is more elongated and much 

 less distinctly tm-rited. The color when fresh is a purpHsh black, 

 which, however, fades in the cabinet to a more or less ruddy 

 brown, after some years. It was discriminated in manuscript half 

 a centm-y ago by Dr. P. P. Carpenter, and has been sent out by 

 that name to collectors, but so far as I knov,' has not yet been 

 published. 



Specimens from Neeah Bay, Washington, numbered 155286 in 

 the museum collection, may serve as types. Height, 19; diameter 

 7 mm. 



TRITONALIA SCLERA, new species. 



Shell of moderate size, yellowish, flushed with more or less dark 

 brown, with six well-rounded \vhorls exclusive of the (lost) nucleus; 

 sutm-e obscure, undulated; axial sculp tm-e of (on the last whorl S, 

 on the penultimate whori 10^^ low inconspicuous rounded riljs ex- 

 tending more or less distinctly to the canal with continually wider 

 interspaces; also low sharp incremental lines minutely imbricating 

 the whole sculpture; spiral sculpture of (on the lycnultimate whorl 

 about 7, on the last whorl about 25) strong prominent cords with 

 wider interspaces usually sho-ving an intercalary thread which on 



