ADAM SIELL A.— Plate II. 



The admired Adamsiella. Shell openly deeply um- 

 bilicated, oblong-conical, whitish, interruptedly three- 

 banded mth red-brown, conspicuously spotted be- 

 neath the sutures, whorls rounded, minutely decus- 

 sately striated, longitudinal strise the stronger, last 

 whorl a little uncoiled, lip conspicuously flatly frilled. 



Cyclostoma mirandum, Contr. to Conch, no. 1. p. 4. 

 Adamsiella miranda, Pfeiifer. 



Ilab. Jamaica. 



Resembling the preceding species in colouring, but with 

 the last whorl more loosely coiled, while the decussation is 

 diit'erent. Here the spiral strife are almost obsolete, and 

 the longitudinal striae have the ap]iearance of fine silken 

 cords. 



Fig. 15 and IG. (ilus. Cuming.) 



The shells here figured represent respectively Professor 

 C. B. Adams' Cyclostoma (Adamsiella) serriferum and 

 conceidricum, both of which alleged species Dr. Pfeifl'er 

 refers to A. Grayana. 



Species 17. (Mus. Cuming.) 



Adamsiella xanthostoma. Adams, testa aperle pro- 

 fundi wubllicatd, srtbacuminato-turritd, cinereo-fiisces- 

 cente, arifractibus rotundatis, spiraliter obtuse liratis, 

 longitudinaHter dense minutissime siriatis, labro callose 

 plano-jimhriato, aurantio-luteo . 



The yellow-mouth Adamsiella. Shell openly deeply 

 innbilicated, rather acuminately turreted, light ash- 

 brown, whorls rounded, spirally obtusely ridged, 

 longitudinally densely very minutely striated, lip cal- 

 lously flatly fimbriated, orange-yellow. 



Cyclostoma xantliostoma, Sowerby, Thesaurus Conch. 

 p. 144. pi. 29. f. 175. 

 Cyclostoma tenuistriatum, Adams. 

 Choanopoma xanthostoma. Gray. 

 Adamsiella xanthostoma, Pfeifl'er. 



Hah. Jamaica. 



Of a more acuminately turreted form than usual in the 

 genus ; this shell is further distinguished by the prominence 

 of its spiral ridges and orange-yellow lip. 



