36 THE NAUTILUS. 



base is conically arched toward the margin of the deep umbilicus ; 

 the whorl near the aperture is bent down and the plane of the 

 aperture forms an angle of about 45 with the axis; the whorl is 

 slightly contracted behind the thin expanded margin of the aperture, 

 which is continuous in the adult across the body whorl and slightly 

 overshadows the umbilicus ; the lip is whitish. Extremes measure : 

 Max. diam. of shell ; of aperture ; height ; 



15.0 9.0 8.0 



16.5 8.5 7.7 



U. S. Nat. Mus., No. 212318. Also Orcutt collection. 

 This is very distinct from the other species of the Trichodiscina 

 group. 



PUBLICATIONS EECEIVED. 



NOTES ON THE GENERA CTPR^EA AND TRIVIA. By H. O. N. 

 SHAW. (Proc. Mai. Soc., London, VIII, 288, 1909.) An inter- 

 esting paper treating on the nomenclature and anatomical difference* 

 between Gyprxa, and Trivia. The latter has a more specialized 

 nervous system and distinct radula. The following are some of the 

 changes in nomenclature which have been considered : Cyprsea in- 

 termedia becomes a synonym of gittei Jouss. C. reticulata, histrio and 

 eglantina are also considered varieties of G. arabica. Cyprsea bi- 

 color, comptonii, declivis and piperata are considered only variations 

 of (7. angustata. C. cruenta Gmel. is not the cruenta Auctorum, but 

 equals errones L.; under these circumstances he adopts the name of 

 variolaria Lam. For the recent C. physis the original name of C. 

 achatidea Sowb. is adopted. For C. punctulata Gray, not Ginelin, 

 the name of robertsi Hildago must be accepted. The name of G. 

 friendii Gray has priority over scottii Gask. C. tubescens is only a 

 synonym of teres. C- ursellus Auctorum, not Gmelin, = C. Melvilh 

 Hildago. O. pantherina Dillw., 1817, becomes a variety of obutusa 

 Perry, 1811. C. prestoni is proposed for interrupta Gray, not Bol- 

 ten. C. hidalgoi for leucostoma Gask., not Gmel. C. gumbiensis for 

 nebulosa Kiener, not Gmel. Trivia edgari is proposed for T. grando 

 Gask, not Potiez. For T. oniscus Lam., not Bolten, the name of T. 

 aperta Swains must be retained. Four new varieties are described : 

 Gyprcea hehola var. callista, C. moneta var. aurea, G. arabica var. 

 prasina, and Trivia ovulata var. rubra. C. W. J. 



