33. fCLACOCEPHALTTB. 173 



haemal spine. The pubio bone is as feeble as the ventral fin itself; 

 it is composed on each side of two narrow laminae, forming together 

 a channel. 



All the teeth form raHier broad villiform bands ; in both th^ jaws 

 they extend to the posterior extremity of the bone ; those of the 

 vomer are arranged in a triangular patch with emargiuate hinder side. 



2. Rhyptdcns arenatosr 



Cuv. <^ Vol. iii. p. 65, pi. 45. 



One continuous dorsal. Greyish brown, punctulated with brown. 

 Coast of Brazil ; Jamaica. 



a. Half-grown. Jamaica. From Dr. Pamell's Collection. 



b, c. Half-grown : skins. Trinidad. Presented by J. B. Richardson, 



Esq. 



3. Bhypticns macnlatiis. 



MU>r. lekthyol S. Carol, p. 39. pi. 6. f. 2. 



D. 2 I 25. A. ^. Cffic. pylor. 4. 



The two dorsal spines separated from the soft portion. Olive- 

 brown with whitish spots. (Holbr.) 

 Cape Remain (coast of S. Carolina). 



4. Rhypticus bicolor. 



Smecticus bicolor, Valenc. I. c. p. 307. pi. 2. f. 2. 



D. 10 I 21. A.^. 



Crimson, marbled with lighter ; all the fins black. 

 Galapagos Archipelago. 



33. AULACOCEPHALTJS. 



Atdacocephalus, Temm. 8f ScMeg. Faun. Japon. p. 15. 



Seven branchiostegals. All the teeth villiform ; without canines ; 

 palatines?; tongue?. One dorsal, with nine spines, the anal fin 

 with three. Operculum with tliree points ; praeoperculum strongly 

 serrated at the lower limb. Scales small. 



Indian Ocean. 



1. Anlacocephalns schlegeliL 

 A\ilacocephalus, sp., Fctun, Japon. p. 15. pi. 5. f. 2. 

 D. K A. -?-. 



■"' 13' "" 10 



The height of the body is 3|| in the total length, the length of the 

 head is more than one-third of it. Sub- and interoperculum den- 

 ticulated ; suprascapula pointed. Violet ; on each side of the back 



