OCR Text |
Show ]867.] DR. j. E. G R A Y O N T H E CALYPTR^IDCE. 747 Shell solki with high, compressed, edged, distant radiating ribs. 2. CALYPTRA ADAMSII, Reeve. Calyptra depressa, Adams & Reeve. rid!p!U^in;Wiith ? 1-°Se' f^P-edged, regular radiating and concen trie ndges, minutely striated between the ridges. Hab. -. ° 3. CALYPTRA ALVEOLATA, A. Adams. c J«T«', ReevT11" °' ""^ ***"• C'^^rensis, Qnoy. C.can- Var 2. Thick, flat. C. varia, Brod. Shell solid, with close, radiating, sharp-edged ribs, and more or less aistinct low concentric ridges. Hab. Philippines ; Galapagos Islands. 4. CALYPTRA EQUESTRIS, Chenu, Man. f. 2322, 2323. Patella equestris, Linn. ? Calyptra papyracea, A. Adams. IC. radiosa, Gould. (Bad state, with another species.) C. scutulum, Reeve. Shell solid with sharp-edged radiating ribs, and small radiating lines between them. ° Hab. Philippines. 5. CALYPTRA STELLA, Reeve. Shell depressed, solid, with very close, flat-topped, radiating ribs which are sometimes alternately smaller Hab. ? 6. CALYPTRA TECTUM-SINENSE, Gray, 1824. Calyptra cepacea, Brod. C. martiniana, C. diaphana, C. scabies, C. domitoria, C tortilis C cornea, C. stallonia, C. cicatricosa, C. ossea, C. saccharimeta, C. balanoides, C. uncinata, C. hipponiceformis, C. porosa C cua-thella, et C.fibulata, Reeve. y C. depressa, Adams & Reeve. Shell thin, very finely, regularly, radiately striated. Var. with expanding concentric lamina. Patella tectum sinensis, Chemn.; Chenu, Man. f. 2324 2325 Hab. Philippine Islands. I am by no means certain that the six species here distinguished are distinct. C. stella seems most distinct from the rest; but there is only one specimen, and Mr. Cuming has mated it with a small specimen of C. equestris. They all seem to live together at the Philippine Islands. |