GUPPY GULF OF PARI A. 
125 
15a. Crepidula cerithicola n. sp. 
Smooth; usually very convex externally, almost hemispher- 
ical, somewhat irregular in figure, marked with radiating flames 
or interrupted stripes of reddish brown which are generally vis- 
ible internally through the shining subtransparent shell. Dia- 
meter of a large example about 8 millimeters. Inhabits the 
outside of Cerithium caudatum Sow. which is abundant in the 
shallow water off Gaspari. It is probably a variety of Cr. joorcel- 
lana ; but it is a very marked form which has been modified in 
accordance with the exigencies of its station. 
Calyptrea Lamarck 
16. O. auriculata Chemn. Reeve, C. I. Crucibulum 15. 
C. cuvieri Desh in Cuv. Regne An. pi. xlviii., f. 4. 
17. C. uncinata Reeve, C. I. Calyptrea 17. 
Trochita Schumacher 
18. Tr. candeana Orb., Moll. Cuba, vol. ii., p. 190 
pi. xxiv., f. 28, 29. 
Pileopsis Lamarck. 
19. “P. antiquata Linn. 
Patella mitrula Gmelin. 
Capulus lamellosus Chenu, Conch, vol. i., p. 329, 
f. 2377. 
Order Cjecivje. 
Caecum Fleming. 
20. C. formulosum Mn, Journ. Linn. Soc. vol. x. 
p. 258, pi. viii., f. 4. 
21. C. plironim uxn. Folin (C. regulate Carp.?) 
A well-defined and simple natural genus, but which (alas!) 
has not escaped the rage for superfluous nomenclature, generic- 
ally and specifically. 
21a. Meioceras xiitidtixxi Stimpson 
