85 



gitudinaliter costellatd, infra fere muttcd ; costelUs dhtantibus, 

 muricatis, squamuliferis, squamulis dlstantibus, subrecurvis, lon- 

 gioribus ; margine dorsali recto, postico rectiusculo, subdectivi, 

 ventrali subventricoso : long. 7"75, alt, {ad partem posticam) 

 3-5 poll. 



Hab. apud Puerto Portrero. 



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



Pinna squamifera. Pinna testa sublanceolatd, corned, costellis 

 paucis squamiferis longitudinaliter radiatd, squamis subdistanti- 

 bus, majoribus, latiusculis, subreflexis, rotundatis, hyalinis ; mar- 

 gine dorsali recto, postico ventralique rotundatis, continuis ; area 

 ventrali rugosd: long. &', alt. (ad partem posticani) Z' poll. 



Hab. ad Caput Bonae Spei. — G. B. S. 



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

 latd et fusco pictd ; costellis subobsoletis, postice squamuliferis, 

 squamulis latiusculis, laxis, sjiarsis; margine dorsali ventralique 

 cequalibus, postico brevi, subrotundato : long. Q', alt. {ad partem 

 posticam) 2'5 poll. 



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

 — G. B. S. 



Mr. Gray exhibited specimens of two Corals, which he regarded 

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

 racterized them as follows : 



Errina. 



CoralUum solidum, calcareum, durum. 



Cellule^ tubulares, promiuentes, superne longitudinaliter fissae, ad 

 apices ramorum undique sparsce : fossa profunda minima ssepe 

 sub basin cellularum sita. 

 Polypus adhuc incognitas. 



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

 t. 18. Lam., ii. p. 201.). 



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

 nata, Ej., are also referrible to it. 



Anthopora. 



CoralUum durum, lapidosum ; superficie granulosa, scabra, vix 



porosa. 

 Cellules sparsae, subcylindricae, supra concavae G-radiatae, infra 

 6-lamellos3e ; lamellis in centre stylifero coadunatis ; stylo vix 

 prominente ; sulcis aliquibus 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. 

 The stars are elongate, tubular, and chambered, like those of Pocil- 

 lopora. 



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

 central style, and the solidity of the coral, with M. de Blainville's 



