ball: mollusca and brachiopoda. 321 



distinctly sculptured ; aperture ovate with a wide, prominent semitubular canal at 

 the suture ; outer lip strongly varicose, with four large rounded nodules on the 

 varix, the edge of the lip modified by the sculpture, not Urate within, white with 

 a few inconspicuous brown spots ; body with a thin varnish of callus wholly ad- 

 herent, a narrow subsutural ridge near the middle, and a small brown spot at the 

 left ; pillar white, callous, arcuate, with six or eiglit low sharp spiral liralions ; 

 canal short, wide, bent to the right with a strong siphonal fasciole and a chink, 

 under the anterior edge of the columellar callus ; throat pinkish. Lon. of shell, 

 44 ; of last whorl, 31 ; of aperture, 25 ; max. diam. 25 mm. 



U. S. S. ■' Albatross," station 3368, near Cocos Island, Gulf of Panama, in 66 

 fathoms, rocky bottom, temperature 580.4 F. U. S. N. Mus. 123,027. 



Nearest to B. caelata Broderip, but of a totally different color and surface, and 

 differing also in details of sculpture. 



Cassididae. 

 OOCORVS Fischer. 



Oocorys Fischer, Journ. de Conchyl., Feb., 1884, 31, p. 392 ; type, 0. sulcata Fischer, 



op. cit. 

 Benthodolium Verrill and Smith, Trans. Conn. Acad., May, 1884, 6, p. 177 ; type, 



B. abyssorum Verrill and Smith, loc. cit. 



In the Monograph of the Miocene of Astoria and Coos Bay, Oregon, I have 

 fully explained my reasons for regarding Oocorys as a member of the 

 family Cassididae, rather than, as Fischer thought, entitled to a separate family of 

 its own. 



In the Blake Report (1889, p. 228) I divided the genus from Atlantic speci- 

 mens into two sections as follows : 

 Section Oocorys s. s. Type, 0. sulcata Fischer. 



Shell not umbilicate, pillar twisted, obliquely truncate, without a marked siphonal 

 fasciole, outer lip smooth. 

 Section Benthodolium V. and S. Type, B. abyssorum V. and S. 



Shell with a narrow but distinct umbilicus and a strong siphonal fasciole ; 

 outer lip obscurely denticulate when fully adult. 



Since then, having seen more material, I an\ in doubt whether these sections 

 should be maintained or not, though complete continuity between them is not yet 

 established. The range of variation is hardly known. It will be observed that 

 I agree entirely with Locard in his " Talisman " report as to the relations of the 

 genus to the Cassididae and, I may add, in referring to it Watson's Bttreiimm 

 aquilarum from near the Azores. The species now known are 0. aquilarum 

 Watson, 0. sulcata Fischer, 0. abyssorum V. and S., 0. watsoni and 0. fscheri 

 Locard, from the Atlantic, and the following forms from the Pacific. 



VOL. XLIIl. — NO. 6 21 



