Ceplmlopterus hypostonius. — Etheneis liuiaia. 411 



fin, at only half an inch behind the eye. I would submit also to Mr. Ben- 

 nett's notice the substitute for teeth with which the edges of both lips are 

 provided, in the form of a " pave" of flattened semi-transparent oblong 

 hexagonal bony substances. Several Rays have a structure somewhat 

 similar, but I have never yet seen that any authour has adverted to it, 

 although it is assuredly deserving of attention, as well for its suitableness 

 to the animal's wants, as for its regularity and beauty *. 



The next object to be mentioned is an Echeneis, which it seems to me 

 cannot with propriety be considered as Ech. J^'aucrates, and, if not, must 

 be regarded as a new species undescribed. Of this I send two specimens, 

 the intestines of one of which I was obliged to have taken out, on ac- 

 count of the degree of putrescence they came into before I had finished 

 the notes and sketch I took of it. This individual was a male, and mea- 

 sured 325 inches from the apex of its inferior jaw to the tip of the upper 

 portion of the caudal fin. The other was an inch and a half longer, but 

 from the flabbiness and light colour, and mottled appearance of the skin, 

 I supposed it to be an old one or else in a sickly state, and therefore a less 

 perfect specimen of the proper colour of the species than the shorter one ; 

 especially as one or two others in a very healthy state that I have seen 

 were exactly of the same dark hue with the latter. My chief reasons for 

 considering it as a distinct species from Ech. Naucrates are that the 

 Naturalists, whose works I have been able to consult, agree in assigning 

 the foUowins: characters to 



* The several Fishes forwarded by Dr. Bancroft were exhibited at the 

 Meeting of the Committee of Science and Correspondence of the Zoological 

 Society on September 27, 1831. Of this exhibition a notice was published in 

 the " Proceedings" of the Committee (Part I, p. 134), together with characters 

 of the new species. 



That of the Cephalopterus is as follows : 



Cephalopterus Hypostomus. C'eph. l<Eris ; ore infero ; pinnarum pec- 

 inralium margine antico declivi recto ; sjiiraculis in Jossd sub bast anticu 

 pinnarum pectoraliiim positis. 



Tab. SiJPPf.. L. 



