46 CYPR.SA. 



single tint covering the whole right surface, as is also the 

 case with his cimex, — I can see no collateral distinguishing 

 character, and do not think this sufficient. The finely - 

 ribbed quadripunctata, with its three or four little spots on 

 the dorsal line, is conspicuously distinct. And Mr. Marratt's 

 affinis, although resembling pacifica in form and character 

 of ribs, etc., has no dorsal groove. Australia is the largest 

 and smoothest shell of the group ; the ribs fine, neither 

 freckled nor crenulated. The margin is generally rose-tinted, 

 and the brown spots on the back very distinct. 



160. cicatrosa, Soivb. (f. 458, 459). — C. testa alba, parva, 

 crassa, subglobosa, postice subexpansa, margine terminali 

 postico crasso, lato ; dorso subelevato ; sulco tortuo, brevi, 

 profundissimo ; costellis crassiuscnlis, rotundis, divergenti- 

 bus ; basi subcomplanata ; labio coluinellari brevi, utrinque 

 calloso ; costellis paucis, rotundis, crassis ; sulco coluinellari 

 profundo ; labio postice prascipue latissimo, crasso. 



Note. — Remarkable for its very deep dorsal sulcus and 

 the posterior expansion of the lip. 



161. nivea, Gray (f. 468, 469). — C. testa globoso-ventri- 

 cosa, obtusa, alba, vix marginata, ; extremitatibus obtusis ; 

 dorso sulco elongato conspicuo mediano diviso, costis crassis 

 undulato-subnodosis ad sulcum abrupte desinentibus armato ; 

 basi rotunda, haud varicosa ; labio columellari brevi ; sulco 

 lato ; labio lato, medio subdilatato. 



162. oryza, Lamk. (f. 474-476). — C. testa alba, ovato-glo- 

 bosa, ad latera vix marginata ; extremitatibus plus minusve 

 productis, obtusis ; dorso medio leviter sulcato ; costellis 

 tenuibus, numerosis, plerumque per sulcum continuis, inter- 

 stitiis granulatis ; basi convexa, columella utrinque subvari- 

 cosa ; labio medio dilatato. 



163. scabriuscdla, Gray (f. 472, 473). — C. testa, C. oryzce 

 affini ; dorso magis elevato ; costellis paucioribus, magis ra- 

 diantibus ; sulco dorsali brevi ; extremitatibus subrostratis. 



164. insecta, Mighaels (f. 477, 478, 479).— C. testa C. oryzce 

 affini, parva, elongata, angusta ; extremitatibus haud tantum 

 emarginatis. 



165. grando, Gash. (f. 470,471). — C. testa C. oryzce affini, 

 nitenti, multo magis globosa ; extremitatibus acuminatis ; 



