85 



g'ttudinaliter costellatd, infra fere mut'icd ; costellis dhtantibus, 

 murtcatts, squamuUferis, sųuamulis distaiitibus, subrecurvis, lon- 

 gioribus; margine dorsali recto, postico rectiusculo, subdeclivi, 

 ventrah subventricoso : long. 775, alt, (ad partem posticam) 

 S- 5 poli. X i / 



Hab. apud Puerto Portrero. 



Dredged from sandy mud at a depth.of thirteen fathoms.— G. B. S. 



PiNNA SQUAMiFERA. Pinna testd sublanceolatd, corned, costellis 

 paucis squamiferis longitudinaliter radiatd, sąuamis subdistanti- 

 bus, majonbus, latiusculis, subrejlexis, rotundatis, hy alinis ; mar- 

 gine dorsali recto, postico ventraliąue rotundatis, continuis ; ared 

 ventrah riigosd : long. 6; alt. (ad partem posticam) 3- poli. 



Hab. ad Caput Bonae Spei G. B. S. 



Pinna Afra. Pinna testd lanceolatd, corned, subradiatim costel- 

 lata et fusco pictd ; costellis subobsoletis, postice squamuliferis, 

 squamulis latiusculis, laxis, sparsis; margine dorsali ventraliaue 

 txqualibus, postico brevi, subrotundato : long. 6-, alt. (ad partem 

 posticam) 2-5 poli. 



Hab. ad Caput Bonae Spei.— Comraunicavit Dom. Ed. Verreaux. 

 —G. B. S, 



Mr. Gray exhibited specimens of two Corals, vvhich he re^arded 

 as the types of two genera not previously distinguislied. He cha- 

 ractenzed them as folio vvs : 



Errina. 

 Corallium solidum, calcareura, durum. 



Cellul^ tubulares, prominentes, superne longitudinaliter fissse, ad 

 apices ramorum undiąue sparss : fossa profunda minima seepe 

 sub basm cellularum šita. 

 Polypus adhuc incognitus. 



The type of tliis genus is the Millepora aspera of Esper (Supp.. i 

 t. 18. Lam., ii. p, 201.). f \ ff ' 



It is probable that the Mill. tubulifera, Lam., and the Mill. pin- 

 nata, Lj., are also referrible to it. 



Anthopora. 



Corallium duium, lapidosum ; superficie granulosS, scabrd. vix 



porosa. 

 Cellults sparsae, subcylindricae, supra concavje 6-radiatae, infra 

 6-lamellosae ; lamellis in centro stylifero coadunatis ; stylo vix 

 prommente ; suleis aliąuibus minoribus inter radios. 

 The outer coat of the coral is hard and stony, and the centre of 

 its branches is cellular, and formed of six-rayed branching stars. 

 Ihe stars are elongate, tubular, and chambered, likę those of Pocil- 

 lopora, 



This genus agrees in the number of the platės of the cells, the 

 centrai style, and the solidity of the coral, uith M. de Blainville's 



