134 K. J. Bush — Marine Ga&tropods referred to 



Lissospira (Ganesa) ornata (Verrill). 



Cyclostrema Dalli, var. ornatum Verrill, these Trans., vi, p. 255, pi. xxxii, fig. 17, 

 1884; Expl. Albatross, Report U. S. Com. Fish and Fisheries for 1883, p. 569, 1885. 



Cyclostrema ornata Ball, Bull. Mus. Comp. Zool., xviii, p. 393, 1889; Bull. U. S. 

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



One live specimen (No. 35610), station 2115, off Cape Hatteras, 

 N. C, in 843 fathoms, 1883. 



As the principal distinguishing feature of the species of this genus 

 lies in the arrangement of the microscopic sculpture, I follow Mr. 

 Dall in giving specific distinction to the varietal name. The umbili- 

 cal fissure, margined by a raised thread, would place the species 

 with Ganesa rather than Tharsis (see p. 113), as suggested by 

 Professor Verrill. 



Lissospira (Ganesa) abyssicola sp. nov. 



Ganeza sp. Verrill, these Trans., vi, p. 202, 1884. 



Ganesa sp. Bush, Bull. Mus. Comp. Zool., xxiii, p. 219, 1893. 



As described by Professor Verrill, this species in general appear- 

 ance resembles a true Lissospira, but the umbilical chink is channeled 

 and defined by a raised thread and the aperture is modified by the 

 body-whorl to which the peritreme is more attached than in typical 

 species. 



It is similar in form to G. Dalli but larger, without sculpture and 

 with the columellar lip less flattened. 



One dead specimen, station 307 Ag., east of George's Bank, in 980 

 fathoms, 1880, " Blake Expedition." 



Lissospira (Ganesa ?) rarinota sp. nov. 



Shell smooth, white, semi-opaque, of firm texture, with brilliant 

 luster so that it appears somewhat porcellanous. Whorls three, 

 convex, with a single, delicate, raised, microscopic, spiral line just 

 below the distinct suture, defining a narrow, inconspicuous, slightly 

 concave or channeled, sutural area. Nucleus relatively small, little 

 raised ; body-whorl large ; spire low. The form of the aperture and 

 peritreme and the channeled umbilical chink, bordered by an incon- 

 spicuous, rounded thread, place this species with Ganesa, although 

 the texture of the shell is firmer and more porcellanous than any of 

 the other species referred to it. Just within the aperture and 

 extending completely around it is a delicate, opaque white line, 

 which in some places appears raised. 



This may prove to be a Cirsonella, p. 120. 



