i i etal tl ea lal 
NEW SPECIES OF CALYPTRAID. 197 
6. Cyatho hemiconico, longitudinaliter quasi diviso. (Calyptraa, Less.) 
2. CALYPTREA CORRUGATA. 
Tab. XXVII. Fig. 2. 
Cal. testd subalbidd, suborbiculari, subdepressd, corrugatd, intus nitente ; cyatho concentrice 
lineato, producto ; epidermide fuscd. 
Diam. 2 poll., alt. -8,. 
Hab. in Americi Centrali. (Guacomayo.) 
Found under stones at a depth of fourteen fathoms. 
3. CALYPTREHA VARIA. 
Tab. XXVII. Fig. 3. 
Cal. testa albidd, suborbiculari, crassiusculd, longitudinaliter creberrimé striatd ; cyatho con- 
centrice lineato, crassiusculo, producto. 
Diam. 14 poll., alt. max. 3, alt. min. 2. 
Hab. in Oceano Pacifico. (Lord Hood’s Island, the Gallapagos, and the Island of 
Muerte in the Bay of Guayaquil.) 
This is a very variable species allied to Cal. equestris, Lam., and taking almost every 
shape which a Calyptrea can assume. It differs in thickness according to locality and 
circumstances. The thickest individuals were found at the Gallapagos and Lord Hood’s 
Island ; at the former place on shells, at the latter on the reefs. ‘Those from Muerte 
are the thinnest and the most depressed. 
4. CALYPTREA CEPACEA. 
Tab. XXVII. Fig. 4. 
Cal. testd alba, suborbiculari, subconcavd, tenui, diaphand, striis numerosis subcorrugata, 
intus nitente ; cyathi terminationibus lanceolatis. 
Long. 1+; poll., lat. 14, alt. 2. 
Hab. in sinu Guayaquil. (Island of Muerte.) 
This was dredged up, adhering to dead shells, from sandy mud at a depth of eleven 
fathoms, by Mr. Cuming. Besides other differences, the terminating points of the 
divided cyathus are much more lanceolate than they are in Cal. varia. 
5. CALYPTREA CORNEA. 
Tab. XXVII. Fig. 5. 
Cal. testé suborbiculari, complanatd, albidd, subdiaphand, concentricé lineatd et radiatim 
striatd, ints nitente. 
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