NEW SPECIES OF CALYPTRAIDA. 20) 
the passages are so very gradual, it is difficult to come to a satisfactory conclusion from 
an unassisted description, however well written it may be. 
13. CaLypTR&A SORDIDA. 
Tab. XXVIII. Fig. 2. 
Cal. testd subconicd, sordide luted, longitudinaliter subradiatd ; apice turbinato ; cyatho de- 
presso, subtrigono, haud profundo. 
Diam. + poll., lat. ,%, alt. 52,. 
Hab. ad Panamam. 
This species, the inside and outside of which are of a sordid yellow, is generally 
covered externally with coral or other marine adhesions. The plate is spoon-shaped. 
Found on stones, on a sandy bottom, at a depth of twelve fathoms. 
14. Caryrrreza Uneuris. 
Tab. XXVIII. Fig. 3. 
Cal. testd tenui, conicd, corrugatd, fuscd ; apice subturbinato ; cyatho depresso, subtrigono. 
Diam. 4; poll., alt. =3,. 
Hab. ad Valparaiso. 
The plate is spoon-shaped, but not so shallow as that of Cal. sordida. 
Found on shells at a depth of from seven to forty-five fathoms. 
15. Caryprrea Licuen. 
Tab. XXVIII. Fig. 4. 
Cal. testéi albidd, interdum pallidé fusco sparsd, subdiaphand, subturbinatd, orbiculaté, 
complanatd. 
Diam. £ poll., alt. 2. 
Hab. in sinu Guayaquil. (Island of Muerte.) 
Found on dead shells in sandy mud, at a depth of eleven fathoms. 
16. CaLyprra#a MAMILLARIS. 
Tab. XXVIII. Fig. 5. 
Cal. testd albidd, subconicd ; apice subpurpureo, mamillari. 
Diam. 53, poll., alt. 34. 
Hab. in sinu Guayaquil. (Island of Muerte.) 
This pretty species varies. It is sometimes milk-white, with the mamillary apex of 
a brownish purple, and with the inside sometimes of that colour, sometimes white, and 
sometimes yellowish. In other individuals the white is mottled with purplish brown 
stripes and spots. 
Found on dead shells in sandy mud, at a depth of eleven fathoms. 
