1896.] NATURAL SCIENCES OF PHILADELPHIA. 455 



incised lineation, and otherwise characterized by somewhat distant, 

 flatly rounded papillae. Under side dingy, yellowish white ; margin 

 of mantle wide, nearly smooth ; edge of same simple. Anal open- 

 ing posterior near edge of mantle and somewhat produced. Respir- 

 atory orifice smaller, in median line with and in front of anus ; sex- 

 ual orifice anterior, on the right side under the edge of the large 

 oral hood or collar; labial palpi thin, largely expanded. Dimen- 

 sions: Length 37.5 ; breadth 31.5 millimeters. These proportions 

 vary slightly in different individuals." 



Onohidella Steindachneri Semper. 



Onchidella Steindachneri Semper, Arch. Phil. Bd. Ill, Heft. VI, p. 295, 

 1883; Stearns, Proc. U. S. Nat. Mus., XVI, p. 384, pi. 51, figs. 4, 5, 1893. 



Charles Island, Habel ; Charles and Albemarle Islands, between 

 tide-marks, U. S. Fish Commission. 



Dr. Stearns' remarks are as follows : 



" A well marked species ; edge of mantle prettily fringed on the 

 under side with rather regularly placed trifoliate processes ; dorsum 

 entirely covered with closely set, rounded, granular papillse, which 

 also cover the surface of the wide mantle margin beneath, up to the 

 «dge of the creeping disk. Color dark grayish or smoky black 

 above ; dingy whitish on the under side. Anal orifice posterior, 

 central just behind the end of the creeping disk? Respiratory ori- 

 fice on the right side near the vent ; sexual orifice anterior near the 

 tentacle or oral appendage, under the edge on the right side. Length 

 about 20, breadth about 17 millimeters. These proportions vary 

 somewhat in different specimens. Some allowance must be made for 

 the contraction caused by the alcohol in both the above and 0. 

 Lesliei. 



BIBLIOGRAPHY. 



SowERBY, George Brettingham. Conchological Illustrations, 

 Bulinus, parts 31, 34, 35 and 142, 1833-41. London, G. B. Sowerbv, 

 1841,8°. 



This work was issued in parts and when completed the letter 

 press, or portions of it, was reprinted and the whole ic-sued as a vol- 

 ume dated 1841. The parts in the copies which I have seen do not 

 have any dates, but Pfeiffer cites the list of Bulinus as 1833 (Mon. 

 Hel. Viv., i, p. xxxii, 1848). It is probable that part 142, contain- 

 ing B. rugulosvs was issued in 1839, but the plates containing the 

 other Galapagos species may be as early as 1833. 



SowERBY, George Brettingham. Descriptions of new species 

 of shells collected by Hugh Cuming. Proc. Zool. Society of Lon- 

 don, 1833, part i, pp. 72-74. 



