394 PROCEEDINGS OP THE ACADEMY OF [July, 



lip calloused, bearing a strong entering callous ridge above. Canal 

 very short, deep and narrow. 



Length 27, diam. 13.5, longest axis of aperture 11.5 mm. 



Length 29, diam. 14, longest axis of aperture 11.5 mm. 



Loo Choo Islands (Mr. Y. Hirase). Types No. 80,631 Coll. 

 A. N. S. P., from No. 279 of Mr. Hirase's collection. 



The sculpture is much more feeble than in (7. morus or its imme- 

 diate allies, though some forms referable to morus resemble this 

 species in form. 



The figure of C. janellii var. in the zoology of the Astrolabe 

 ei Zelee, Atlas, PI. 24, fig. 22, resembles C. chemnitzianum some- 

 what, but differs in the plicate spire. In the monographs by Reeve, 

 Tryon and Kobelt I fail to find anything much like the present spe- 

 cies. This shell is named for the author of the most extensive shell 

 iconography of the eighteenth century, a work of utility up to this 

 day. Would that A. Adams, a hundred years later, had defined 

 his species half as well! is one's thought on working with Japanese 

 mollusks. 



LITTOBINIDJB. 

 Echinella cumingi var. luchuana Pils. pi. XIX, fig. 16. 



See p. 198. Types are No. 70,962 Coll. A. N. S. P. 



This variety resembles Tectarius spinulosa Phil. (Abbild. Ill, 

 Littorina, PI. 6, f. 24), but that is imperforate, while this has an 

 open, cylindrical umbilicus. 



PYRAMIDELLIDJE. 

 Syrnola bacillum n. sp PI. XXI, fig. 25. 



Shell slender, rod-like, marbled reddish-brown and white, with 

 a narrow baud of alternate brown and white spots revolving mid- 

 way between sutures and on the middle of the upper surface of the 

 last whorl, which has a white peripheral belt; this coloring 

 sometimes very faint. Nuclear whorl standing obliquely on edge, 

 the very short spire inclined downward; subsequent whorls 12^ or 

 13, flat, separated by deeply cut sutures, sculptured with faint 

 growth -lines and an impressed line revolving below the suture; 

 some very faint spirals showing elsewhere in certain lights. Periph- 

 ery rounded, the base convex, subperforate. Aperture small, 

 narrowly ovate; columella bearing a single strong fold. 



