C ALYPTRiE A. 



Species 7. (Fig. 7 a and 7 b, Mus. Cuming.) 



CalyptRjEA Auamsii. Calyp. testa suborbiculari, soli- 

 diusculd, depresso-conicd, concentrice plicato-laminaid, 

 vertice obtusd, radiatim dense lirato-striatd, str'm 

 valde acutis, conferlk, undulatis ; appendice interna 

 prominente ; valvd basali tenia, stibobscurd. 



Adams's Calyptr.i;a. Shell nearly orbicular, rather 

 solid, depressed, conical, concentrically plicatcly la- 

 minated, obtuse at the top, radiately densely ridge- 

 striated, strias very sharp, close set, waved, internal 

 appendage prominent ; basal valve thin, rather ob- 

 scure. 



Caiyptraa depressa, Adams and Reeve (not of Lamarck), 

 Moll. Voy. Samarang, p. 70. pi. 11. f. 2 a, b. 



Hab. Dalegucte, Island of Zebu, Philippines (on masses 

 of coral, buried in sand at a depth of from two to 

 four feet) ; Cuming. 



Detached specimens of this species, collected by Sir Ed- 

 ward Belcher in the China Sea, and described by Mr. 

 Adams and myself in the ' Mollusca of the Voyage of the 

 Samarang,' under a name which I find has been used by 

 Lamarck in reference to a fossil species, prove identical 

 with the specimen before me collected by Mr. Cuming on 

 its native coral at the Philippine Islands. Fig. 7 b re- 

 presents a piece sawn from a block of coral with the thin 

 basal plate in the centre; and Fig. 7 a represents the shell 

 detached from it to show the interior. 



Species 8. (Fig. 8 a and 8 i, Mus. Cuming.) 



Calyptr^a alveolata. Calyp. testa suborbiculari, sor- 

 dide alba, depresso-convexd, vertice acute rostratd, ver- 

 tice sublaterali, radiatim liratd et striata, liris fiexuo- 

 sis, valde irregularibm, undlque compresso-squamatis, 

 concentrice hie illic tenuefimbriatd; appendice interna 

 subextensd. 



The honeycombed Calyptr^a. Shell somewhat orbi- 

 cular, dull-white, depressly convex, sharply beaked 

 at the top, top rather lateral, radiately ridged and 

 striated, ridges flexuous, very irregular, everywhere 



compressly scaled, concentrically thinly fimbriated 

 here and there; internal appendage rather extended. 



A. Adams, MS. Mus. Cuming. 



Hab. Galapagos islands ; Cuming. 



The ridged sculpture in this species has a peculiar 

 wildly flexuous character, and is laterally compressed and 

 raised into scales throughout, interrupted at intervals with 

 fine concentric laminar frills. 



Fig. 9 a and 9 4. (Mus. Curaing.) 

 This transparent and elaborately carved shell, collected 

 by Mr. Cuming, at Baclayan, Island of Eohol, Philippines, 

 appears to be a variety, of more regular and delicate growth, 

 of the preceding species from the Galapagos Islands. The 

 general form, especially as regards the vertex, is the same, 

 and the idea of sculpture, though difi^erently developed, is 

 similar. 



Species 10. (Mus. Cuming.) 



Calyptr^a tectum-Sinense. Calyp. tedd orbiciilari, 

 pellitcido-albd, depressa, lamellis tenuibus concentricin 

 numerosis pectdiariter contabulatd, lamellis striis dense 

 radiatis, vertice recto; appendice interna subpromi- 

 nente. 



The Chinese-roof CALYPTR;y,A. SheU orbicular, trans- 

 parent-white, depressed, peculiarly roofed with nume- 

 rous concentric lamellifi, which are densely rayed with 

 stria;, vertex straight ; internal appendix rather pro- 

 minent. 



Lamarck, Anim. sans vert. vol. vii. p. 624. 



Patella teclmn-Sinetise, Chemnitz. 



Hab. Island of Capul, Philippines (abundant under stones 

 at low-water) ; Cuming. 



The peculiar succession of raised lamellas with which 

 this species is roofed, giving an appearance to the shell 

 which suggested to the old French uatm-alists the name 

 of Le Toit Chinois, has been so often figured that I have 

 deemed it siiflicient to give the under surface and interior. 



December, 1858. 



