CYPRiEA. 47 



costellis tenuioribus, nunierosissimis ; apertura angustissima, 

 subspiraliter sinuata, ; columella3 varicibus terminalibus acu- 

 tis, angustis, promiuentibus. 



166. vite^a, Gash. (f. 456, 457).— C. testa G. oryzae affini, 

 C. graudini sinrili, etiam inagis globosa ; extrernitatibus haud 

 productis ; sulco profimdo ; costellis acutis, majoribus, ad 

 sulcum subangulatis, alternatim partira interruptis ; basi 

 rotunda, varicibus nullis. 



167. globosa, Gray, (f. 466, 467, 524*).— C. testa C. oryza 

 affini, C. vitrcece simili, minuta, globoso-brevissima ; extremi- 

 tatibus brevissimis, acutis ; sulco dorsaU profundo, angusto, 

 ad extremitates continuo ; costellis numerosissimis, tenuibus, 

 ad sulcum abrupte terrninantibus. 



168. brevissima, Sowb. (f. 523, 524). — C. testa C. globosa; 

 affini, sed sulco dorsali nullo aut inconspicuo. 



Note. — I observed several specimens of this in the collec- 

 tions of Miss Saul and Mr. Hugh Owen after the completion 

 of the Plates. In every respect it appears like globulus, ex- 

 cepting in the having scarcely any dorsal mark, in some 

 specimens none. 



Nivea, oryza, scabriuscula, insecta, grando, vitrma, globosa, 

 brevissima. Although Mr. Gaskoin's observations threw 

 some doubt over the identity of Gray's species nivea, it will 

 be better to retain the name, as applied in the ' Conchological 

 Illustrations ' and in the ' Conchologia Iconica/ to the 

 rough-ribbed species figured. We believe f. 474, 475, 476 

 to represent the true Lamarckian oryza. Specimens of the 

 same are in the Cumingian cabinet, as G. Sandivichensis. 

 G. scabriuscula of Gray may quite possibly be a variety of 

 the same species, but is characterized by coarser sculpture, 

 a higher, rounded back, produced, rostrated extremities, 

 and very short dorsal sulcus. Insecta, on the other hand, is 

 of a uniformly small size, narrow elongated form and de- 

 pressed back, and, hke oryza, lengthened sulcus. All three 

 have smooth ribs and granulated interstices ; and it is quite 

 an open question whether they should be regarded as one 

 species (oryza) or as three. Globosa is extremely short and 

 round, with extremities scarcely produced, a very narrow 

 aperture, and a sharply-cut dorsal sulcus reaching to the 

 extremities. The ribs are abruptly interrupted at the 

 sulcus. Grando is more like oryza in general form, although 



