CASSIS. 



Species 13. (Fig. o, JIus. Saul ; Fig. /; and c, Mus. Cuming.) 



Cassis tenuis. Cass, testa ovato-ohlougd, cijUudraced, 

 CypriBtefoj-mi, tenuiculd, spird brevissimd, mifradilms 

 lambuis, transversitii regulariter sulcatis, sidciii binis, 

 interstitim longUudlnaliter obtuse liratis, tiiberculorum 

 seriebus quatuor armatis ; columella vix concavd, su- 

 per ne et iiiferni rugatd, labro externa peculiar iter 

 rejlexo, fortiter dentato-Urato, liris binis ; aperturd 

 elomjatd, extremitatibus ambahus canalieulatis ; pur- 

 pureo-fuscd, livido-cceruleo nebulatd, sulcis lirisgue dor- 

 salibm caruleo-albidis, columelld pnrpureo-nigrd, rugis 

 albis, labro colmnellari basin versus rufo vivide tinctd, 

 area pone labruni externum purpureo-nigro coiispicue 

 nwcnlatd. 



The thin Cassis. Shell ovately-oblong, cylindrical, 

 Cowry-shaped, rather thin, spii-e veiy short, whorls 

 smooth, transversely regularly grooved, grooves two 

 and two, interstices longitudinally obtusely ridged, 

 armed with foiu' rows of tubercles ; columella slightly 

 concave, wrinkled above and below, outer lip pecu- 

 liarly reflected, strongly dentately ridged, ridges in 

 pairs, apertm-e elongated, both extremities channelled ; 

 purple-brown, clouded with livid blue, dorsal grooves 

 and ridges white, columella stained towards the base 

 with bright red, area behind the outer lip conspi- 

 cuously blotched with piu'ple-black. 



GiiAY, Wood Index Test. Supp. pi. 4. f. 4. 

 Cassis Massena, Kiener. 



Hab. GaUapagos Islands (in sandy mud at the depth of 

 six fathoms) ; Cumiug. 



M. Deshayes in his notice of tlus species likens it to the 

 C. testiculus; the accompanying figure of a matui'e specimen 

 shows, however, that it is much more nearly allied to the 

 C. rufa. In its most advanced stage of growth the shell 

 is comparatively thin, the lip being cm-led back without 

 any great deposit of enamel ; the general form is more 



cylindrically oblong than that of C. riifa, and the aperture 

 is wider. The colour and marking are extremely pretty. 

 The C. tenuis, of wliich a very small but accui-ate figure 

 was pubUshed by Mr. Wood in his supplement to the 

 ' Index Testaceologicus,' has been very generally mistaken 

 by English collectors for Lamarck's C.pennata, whicli 

 is merely the young of C. rufa. 



Species If. (Mus. Saul.) 



Cassis coarctata. Cass, testd cylindraceo-ovatd, cras- 

 sinsculd, spird brevi, anfractibus evaricosis, iransversim 

 temiissime striatis, costis nodulosis cingulatis, iiuarum 

 quatuor ceeteris majoribm; columelld breviplieatd et 

 oblique subtiUter rugatd, labro intus dentato-lirnto. 

 sttpei-ni coarctato, non reflexo, apei'turd elongutd, an- 

 gustd; cinereo-albidd, pnrpureo-fusco finctu, /luiluti.s 

 nonnulUs albicantibus, columelld labroque rufescentibus. 



The contracted Helmet. SheD cylindrically ovate, 

 rather thick, spire short, whorls destitute of varices, 

 transversely very finely striated, encircled by nodulous 

 ribs, four of wliich are larger than the rest ; cohmiclla 

 shortly plicated, and obhquely finely wrinkled, lip 

 dentately ridged within, contracted at the upper part, 

 not reflected, aperture elongated and narrow ; ash- 

 white, stained with purple-brown, some of the nodules 

 wliitish, lip and columella reddish. 



Gray, Wood Index Test. Supp. pi. 4-. f. 5. 

 Cypraacassis coarctata, Stutchbui-y. 



Uab. Gallapagos Islands, Pacific Ocean (in crevices of 

 rocks) ; Cimiing. 



The contraction of the outer lij), whicli is always con- 

 stant, is a singidar feature in this species. For the mag- 

 nificent specimen here represented, which is of unusually 

 large size, I am indebted to the choice collection of Miss 

 Saul. 



August, 1S4S. 



