200 MR. BRODERIP’S DESCRIPTIONS OF SOME 
10. CaLyprR#A HISPIDA. 
Tab. XXVII. Fig. 10. 
Cal. testé subovatd, subconicd, albd strigis maculisque subpurpureo-fuscis varia, striis fre- 
quentibus et spinis tubularibus erectis hispidd; limbo crenulato; apice turbinato ; 
cyatho subdepresso. 
Diam. +2 poll., lat. 2,, alt. =3,. 
Hab. in sinu Guayaquil. (Island of Muerte.) 
This elegant species, the circumference of whose somewhat depressed cup is free 
with the exception of one part, where it adheres laterally, was found on dead shells in 
sandy mud at a depth of twelve fathoms. 
11. CatyprreA MACULATA. 
Tab. XXVII. Fig. 11. 
Cal. testé ovatd, albidd purpureo-fusco maculatd, longitudinaliter rugosa ; limbo serrato ; 
apice subturbinato, subincurvo. 
Diams+ poll, lat... alt. s. 
Hab. in sinu Guayaquil. (Island of Muerte.) 
The external contour of this shell, more especially in the position of the subturbi- 
nated apex, much resembles that of Ancylus. The circumference of the cup is free, ex- 
cepting at one point, where it adheres laterally throughout its length. 
Found in sandy mud on dead shells, at a depth of eleven fathoms. 
12. CaLypTR#A SERRATA. 
Tab. XXVIII. Fig. 1. 
Cal. testd suborbiculari, alba, subpurpureo vel fusco interdum fucaté vel strigatd, costis lon- 
gitudinalibus prominentibus rugosis ; limbo serrato ; apice subturbinato ; cyatho valde 
depresso. 
Diam. + poll., lat. =5,, alt. =3,. 
Hab. ad Real Llejos et Muerte. 
Var. testa alba. 
Found on dead shells in a muddy bottom, at the depth of from six to eleven fathoms. 
There is a variety entirely white. 
Subgenus SypHopaTE.ia, Less. ? 
Cyatho seu potius lamina interna subtrigona, subcirculari, latere dextro replicato. 
I think it very probable that the five following species belong to M. Lesson’s sub- 
genus Syphopatella ; but no reference is given in the ‘ Zoologie’, and in a family where 
