I'^O K. J. Bush — Marine Gastropods referred to 



Type, Lissospira proxima (Tryon). 



Cyclostrema rugulosum Verrill, these Trans., v, p. 533, 1882, non G. 0. Sars, 1878. 



Cxjdosirema affineYevrm, op. cit. vi, p. 199, pi. xxxii, fig. 15, 1884, non Jeffreys, 

 1883. 



Cyclostrema sp. Verrill, Expl. Albatross, Report U. S. Com. Fish and Fisheries for 

 1883, p. 569, 1885. 



Cyclostrema proxima Tryon, Manual of Couchology, x, p. 98, pi. 33, fig 4, 1888. 



Cyclostrema trochoides DaW, BviW. Mus. Comp. Zool., xviii, p. 393, 1889; Bull. U. 

 S. Nat. Mus., No. 37, p. 166, 1889. 



Figure 4. Plate XXII. fig. 3. 



A comparatively few specimens were obtained by the U. S. F. C. 

 at about twelve stations between N. lat. 41° 53', W. long. 65° 35' 

 and K lat. 35° 49' 30", W. long. 74° 34' 45", in 365 to 858 fathoms. 

 A young specimen (No. 78460) from near stations 2692-6, N. lat. 

 46° + , W. long. 44° + , in 73-105 fathoms, was also identified as this 

 species. 



-p. ^ The operculum (fig. 4) is thin, of a delicate horn- 



color, slightly concave in front. The radula appar- 

 ently had the same number of teeth in each row as in 

 that of L. diajihana and L. hasistriata^ but was 

 unfortunately lost befoi'e the form of the median 

 tooth could be satisfactorily determined. 



Mr. Jeffreys seems to have had a very confused 

 idea as to the exact form he intended to stand as the tj^pe of his 

 species trochoides. A specimen which he identified for Dr. Friele 

 as trochoide (published by the latter in 1875, not described) proved 

 to be the kevk/atitm G. O. Sars, 1878 (teste Friele and Sars). Speci- 

 mens identified as trochoide for Professor Sars, described and figured 

 by him in 1878, must stand for the species, especially as Mr. Jeffreys 

 himself never published a description or figure of it ; Sars' species, 



^ There seems also to be some question in regard to the true Cyclostrema basistriatum. 

 Jeffreys, 1877, non Brugnoae. In Ann. Mag. N. H., p. 234, 1877, under this species 

 Mr. Jeffreys described three differently sculptured forms : a, " spiral strife on base 

 encircling the umbilicus " ; b, "a single ridge-like stria at the top so as to give «n 

 angulated appearance to the summit " ; c, " umbilicus surrounded by a strong keel- 

 like stria"; while in P. Z. S., p. 90, 1883, he added the fourth, d, "striated through- 

 out," and ^' C. profundum Friele is this form " (p. 141.) In 1886 Dr. Friele very 

 decidedly stated that his species was not the basistriatum of Jeffreys. G. 0. Sars 

 described and figured the form having stria3 on the base only and this ought to stand 

 for the true or typical form and is undoubtedly a Lissospira. The basistriatum of 

 Brugnone was said by Jeffreys to have been changed to curvislriatiim Brugnone. 



