488 CAEANGID-S:. 



pi. 42. f. 2 ; Bleek. Verh. Batav. Genootsch. xxiii. Chcetod. p. 29 ; 



Pei.vs, JViegm. Arch. 1855, p. 247. 

 Monodactylus rhombeus, Cant. Catal. p. 172. 

 Psettus argenteus, Richards. Voy. Ereb. ^ Te)-r. Fishes, p. 57. pi. 35. 



f. 1-3. 



D. J. A. ^. L. lat. 75. Vert. 9/14. 



The height of the body is Ig in its length (without fins) ; the 

 diameter of the eye is nearly one-third the length of the head. 

 Silvery : a blackish ocular band, indistinct in mature specimens. 



From the Red Sea, through all the Indian Seas, to the coasts of 

 Australia and Polynesia. 



a. Half-grown. Moluccas. Purchased of Mr. Frank. 



h. Adult : skeleton. Amboyna. Purchased of Mr. Frank. 



c, d. Skins. Malayan Peninsula. From Dr. Cantor's Collection. 



e. Half-grown. Ceylon. Presented by Sir A. Smith. 



/. Half-grown. Purchased of Mr. Frank. 



g. Half-grown. Australia. 



h. Adult : skin. Australia. 



i. Adult. From the Museum of Economic Geology. 



Tc. Half- grown. From the Collection of the Zoological Society. 



I. Adult. From the Haslar Collection, 



The skeleton is very similar to that of the preceding species, but 

 less compressed and elevated ; it differs chiefly in the following points : 

 the interior of the lateral ridges on the upper surface of the skull is 

 scarcel_; visible ; the mandibula is very low. I do not find oiore than 

 nine abdominal vertebrae, one of the anterior ones not being developed, 

 apparently owing to the short longitudinal diameter of this portion ; 

 its length is to that of the caudal portion as 1 : 2-1. The posterior 

 intemeurals and interhsemals are feeble, and leave free spaces between 

 them. The first haemal anil interhacmal are also united to a strong 

 bone, but it is much shorter than the vertebral column ; it is infe- 

 riorly dilated into a triangular plate with a slight ridge. The ribs 

 are of moderate strength and length. 



3. Psettus falciformis. 



Monodactylus falciformis, Lac^p. iii. pp. 131, 132, 133. 

 Psettus commersonii, Cu>\ Hf Val. vii. p. 250. 



D. i-. A. ^. 



29 29 



Scales very small. The ht'ght of the body is If in its length 

 (without fins) ; the diameter of the eye is 2i in the length of the 

 head. Silvery. 



Red Sea ; Sea of Vanicolo ; Chinese Sea. 



a. Adult : bad state. Red Sea. Purchased of Mr. Frank. 

 h. Adult : stuff'cd. 



c. Adult : skin. 



d. Adult : skin. Purchased of Mr. Warwick. 



