ACANTHOPLEURA. 225 



C. granatus Reeve (pi. 48, figs. 29, 30). Shell oblong-ovate ; 

 valves strongly, roughly grained, especially at the sides ; umbos 

 smooth ; dirty ash or stone color, grains blackish, umbonal eminence 

 blotched with black ; ligament horny, jet black. Habitat -- ? 

 (Reeve.} 



The figured type, according to Carpenter, has lost its anterior 

 valve and girdle spines. The tail-valve should be examined in order 

 to tell whether it is a specimen of spiniger or of borbonica, but I am 

 disposed to believe it the former. 



Fig. 28, of pi. 48 is drawn from a large specimen belonging prob- 

 ably to the granatus form. The dorsum has a green band flanked 

 by creamy-flesh colored wider bands, more or less suffused with 

 green. The surface is very strongly granulated. 



Reeve's C. CUNNINGHAMI, to which piceus Rv. non Gmel. and 

 obesm Shuttlw. may be added, probably represents a variety char- 

 acterized by the large size, fine girdle-spines, etc. 



C. cunninghami Reeve (pi. 49, figs. 33, 34). Shell oblong-ovate, 

 valves rather thick, concentrically ridged throughout, radiated from 

 the umbones with raised stria? ; posterior terminal valve retusely 

 umbonated ; lateral areas scarcely distinguished ; greenish-black, 

 valves longitudinally painted in the middle with a brown band ; 

 ligament horny. (Reeve.) 



Australia. 



Conch. Icon., t. 27, f.181, Oct. 1847." C. 

 magnificus Gray?" Sows. Conch. Illustr., p. 2, fig. 52 (not 

 described.) 



The identity of the undescribed C. magnificus (Gray) Sowb. non 

 Desh., with Reeve's 0. cunninghami, is evident, the figures being 

 extremely similar. 



Carpenter gives the following notes on the type : " One specimen, 

 marked by Baird (and rightly, I think) to be the same as piceus 

 Rve. The valves are remarkably well grown, in quiet waters, and 

 the sculpture is rather differently developed in consequence. The 

 girdle has dried in around the valves, and the hairs are worn off 

 except in the sutures, where they are short, crowded and black. 

 Reeve's figure is very good except that the jugular parts appear too 

 decided; they are simply worn smooth. The mucro is elevated, 

 central, posterior slope convex; jugular area eroded; central areas 

 wrinkle-granose, rugulse radiating forward, more or less inter- 

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