CULTELLUS. 



Species 20. (Mas. Brit.) 

 CuLTELLUS fOSTATUs. See Plate III. Fig. 8. 



Species 21. (Fig. 9, h, Mus. Brit.) 

 CuLTELLUS MEDICS, var. See Plate III. Fig. 9. 



Species 22. (Mus. Brit.) 



CuLTELLUS viTiiEUS. Cul. tcstd jHirvd, semipelluciild, 

 oblongd, lentissime areuatd ; latere antico brcvi, 

 rotundo : margine ventrali wqiuditer conve.ro. 



The gl.\sst Ccltellcs. Shell small, scmipellucid, 

 oblong, very slightly arched ; anterior side short, 

 rounded ; ventral margin equally convex. 



BoissY. MS. Brit. Mus. 



Hab. Singapore. 



This little glassy species somewhat resembles the 



British C. piUucidtis. 



Species 23. (Fig. a, b.) 



CuLTELLUS CULTELLUS. Cul. tcstd acicformi, areuatd, 

 post-medium laid, ante-medium attenuatd, tcrminis 

 utrinqui acclivibus ; pallidd, sparsim maculis 

 pmpureis aspersd ; rnhniibus fere terminalibus. 



The little cutlas Cultellus. Shell scimitar-shaped, 

 arched, broad past the middle, attenuated before the 

 middle, sloping upwards at both ends ; pale, sprinkled 

 sparingly with purplespots;umbonesalmost terminal 



Linnaeus (Solen). Syst. Natura;. 



Cultellus Australis, Dunker. 



Hab. Port Essington, Australia. 



In Cultellus lividus the greatest breadth is before the 



middle ; in the present, which is the typical species, 



the greatest width is behind the middle. 



Species 24. (Mus. Brit.) 

 Cultellus o\-alis. Cul. tatd cloiujuto-ovutd, siib- 

 ventricosd, aureo-subviride, ittrinque versks terminos 

 grisesceiiti ; latere antico 2)roducto, subacuminato ; 

 latere pvstico oblongn, obtuse subtruncato ; mnrgine 

 ventrali conve.ro ; margine do7-s<ili paulo decliri. 



The oval Cultixlus. Shell elongate, oval, sub- 

 ventricose, greenish gold, greyish on both sides 

 towards the ends ; anterior side produced, rather 

 acuminated ; posterior side oljlong, obtusely trun- 

 cated ; ventral margin conve.K ; dorsal margin :i 

 little sloped. 



Dunker ? MS. Brit. Mus. 



Hub. Singapore. 



Larger and more ovate than Ciilti'n)iS medius. 



Species 25. (Mus. Sowerby.) 



Cultellus scalpellum. Cul. testd elongatd, tenui, 

 epid.ermide nitenti, subviridi, indutd ; latere antico 

 producto, rotundo; latere postico elongato, attenuate, 

 acuminata; marr/ine dorsali recto ; margine ventrali 

 concexo, utrinque acclivi. 



The scALrEL Cultellus. Shell elongated, covered 

 with a thin, shining, greenish epidermis; anterior 

 side produced, rounded ; posterior side elongated, 

 attenuated, acuminated; dorsal margin straight; 

 ventral margin convex, sloped upwards at each 

 end. 



SowEr.nv. 



Hab. Red Sea. 



Of the general form and aspect of Cultellus cultellus, 

 but with the anterior end produced as in Cultellus 



Species 26. (Mus. Sowerby.) 



Cultellus lucidus. Cul. testd compressd, ovatd, tenui, 

 epider7nidc nitenti, Jlavido-sitbviridi indutd , fasciis 

 purpureis latis radiatd ; ad terminum posticum. 

 suhtruncatd ; margine dorsali post umbones convexd, 

 ared sithnarginali compressd. 



The lucid Cultellus. Shell compressed, ovate, thin, 

 covered with a shining, thin, yellow-greenish 

 epidermis, rayed with broad purple bands ; partly 

 truncated at the hinder extremity ; dorsal margin 

 convex behind the umbones, with a submarginal 

 comjjressed area. 



Conrad ? MS. Brit. Mus. 



Hab. — ? 



