ZOOLOGY OF FK1{ NANDO NORONIIA. 



569 



liemarJi:s. 



Of the present collection, it may be stated that the facies is 

 West-Indian. Chondrilla pliyllodes, Sdt., has as yet only been 

 chronicled by that author, and that, too, from the " Antilles " 

 (Grundziige Spong.-F. atlantisch. Gebietes, p. 26). " ^oly- 

 therses'' was the name given by Duchassaing and Michelotti 

 to this transformed, sponge-like body which they dredged in the 

 Caribbean Sea, and whose constituent parts have been above 

 noticed. Both sorts of the Officinal Sponge, viz. the "Best 

 Turkey " and the " Honeycomb " of Commerce, are plentiful, as 

 they are in the West Indies generally. The Calcisponge, 

 Leuconia sacculata, is a new species. 



MADREPORARIA. 



By Prof. P. Martin Duncan, M.B. (Loud.), E.E.S., &c. 



Section MADEEPORARIA APOROSA. 

 Family A s t R ^ i d iE, Ud. Sf H. 

 Subfamily AsTRjiiDiE reptantes. 



AsTRANGiA soLiTARiA, Lesueuv, sp., Verrlll, Bull. Mus. Comp. 

 Zodl. No. 3 ; Fourlales, 1871, 111. Cat. Mus. Comp. Zobl. p. 79. 



A specimen mucli covered with Nullipores. The corallites 

 smaller than the Florida types, and the so-called " pali " not 

 united before the second and third cycles of septa. The form is 

 allied to Astrangia Dance and to A. Ilichelint. It may be con- 

 sidered as a small variety of the Floridan species. 



Subfamily AsTRiEiuiE ciESPiTos.E. 

 MussA, sp. — A worn specimen of a species. 



Subfamily ASTRiEIUiE AaGLOMERATiU FISSIPARANTES. 



Favia conferta, Verrlll, 18G7, Irans. Connect. Acad. vol. i., 

 in Hartfs Collection of Corals from the Abrolhos Reef, Brazil, 

 p. 355 (1868). 



This species is remarkable for its elongated calices due to 

 fissiparity, and for their closeness. Often a ridge separates the 



J.INN. JOURN. — zoology, VOL. XX. 43 



