MUSEUM OF COMPARATIVE ZOOLOGY. 315 



surface spirally sculptured with numerous strong raised lines between which 

 are 2-4 much finer ones, all reticulated by well marked elevated incremental 

 lines, and crossed by (on the last whorl thirteen) solid smooth white recurved 

 varices, mostly continuous over the spire, though descending deeply into the 

 suture and not appressed to the preceding whorl. Close to the suture is a 

 notch in each varix, over which is recurved a very short sharp spine (usually 

 broken off) ; base sculptured like the rest, with no cordon or disk, imperforate 

 with a very narrow axial fasciole; aperture roUnded ovate; lip reflected, rounded, 

 not very wide, slightly anteriorly expanded but not patulous. On the last 

 whorl one or two varices are larger than the rest. Lon. 17.5, max. lat. 5.5 mm. 



Habitat. U. S. Fish Commission Station 2619, twenty-five miles off Cape 

 Fear, N. C, in 15 fms. 



This beautiful species is nearest to S. centiquadra Morch, from which it 

 differs by its more numerous, smaller, and differently shaped varices, which 

 are compact and rounded, while in centiquadra they are sharp and blade-like ; 

 by its color, the last mentioned being white ; and lastly by the different char- 

 acter of the reticulation, which is much more even in both directions in centi- 

 quadra than in the present species, resulting in a finer and more square network 

 in the former, which when worn remains in the shape of punctures. 



Scala eburnea Potiez & Michaud, is among the species dredged south of Hat- 

 teras by the U. S. Fish Commission. It is said to be the S. fragilis of Gray. 



Scala Dalliana Verrill & Smith. 



Scalaria Dalliana Verrill & Smith, Am. Journ. Sci., XX. pp. 391, 395, Nov., 1880; 



Trans. Conn. Acad., V. p. 527, pi. lvii. fig. 33, 1882. 

 Scalaria clathratula Jeffreys, P. Z. S. 1884, p. 136, not of Adams. 



Off Martha's Vineyard, in 100-200 fms. ; off the coast of North Carolina at 

 Stations 2592, 2595, and 2614, in 63-168 fms., U. S. Fish Commission. 



This species was referred by Dr. Jeffreys to S. clathratula, from which it is 

 perfectly distinct. In examining the Scalidm of the Jeffreys collection, I came 

 upon the specimen received by Dr. Jeffreys from Prof. Verrill, and still retain- 

 ing his label, upon which the erroneous opinion was based. To my surprise 

 it proved to be a specimen of clathratula, quite as different from the genuine 

 Dalliana as any of the European specimens. I mention this here, because, if no 

 accidental substitution has taken place, it adds one species to our fauna, and 

 explains what would otherwise seem an extraordinary blunder to those who 

 are acquainted with the two species. 



Scala (Cycloscala) Dunkeriana Dall. 



Scalaria soluta Dunker, Morch, Malak. Bliitt., XXII , 1874, p. 145; Cat. W. I. Sca- 

 lida, No. 10, p. 195, pi. xxix. fig. 5, 1876. Not S. soluta A. Adams, 1862, nor 

 S. soluta Tiberi, 1863. 



Habitat. St. Thomas, W. I. Krebs; Garden Key, Tortugas, Simpson; No 



