8. DIAGKAMMA. 319 



1. Diagramma gibbosum. 



Diagramma gibbosus, (^Hombr, Sc Jacq.) Guichen. Voy. Pole Sud, Poiss. 

 p. 46. pi. 5. f. 2. 



D. 15. A. K 



18 8 



The height of the body is 2| in the total length, the length of 

 the head nearly four times. The distance of the caudal fin from the 

 dorsal is longer than the height of the tail beneath the end of the 

 dorsal (according to the figure). Dorsal fin notched, with strong 

 spines ; caudalis subtruncated ; the second anal spine much longer 

 and stronger than the third ; the fourth dorsal spine longest. Uni- 

 form greenish. (Guichen.) 



Samoa (Polynesia?). 



2. Diagramma crassispiuum. 

 Riippell, N. W. Fische, p. 125. taf. 30. f. 4. 



The height of the body is 2-2 in the total length, the length 

 of the head 3f ; the distance between the dorsal and caudal fins is 

 much longer than the height of the tail below the end of the doi-sal 

 (according to the figure). Dorsal fin notched, with strong spines ; 

 the fourth dorsal spine longest, 2^ in the height of the body ; the 

 second anal spine much longer and stronger than the third. Caudalis 

 truncated. Uniform blackish; fins black. {Rupp.) 



Red Sea. 



3. Diagramma afl&ne. (Plate XIX. fig. A.) 



? Diagramma crassispinum, Bleek, Verh. Batav. Genootsch. xxiii. 

 Scicen. p. 26 (not Rilpp.). 



D. Ji. A. |-. L. lat. 45. L. transv. 9/16. 



The height of the body is 2| in the total length, the length of the 

 head 3f ; the distance between the dorsal and caudal fins is less 

 than the height of the tail below the end of the dorsal. Dorsal fin 

 notched, with strong spines, the fourth of which is the strongest, 2i 

 in the height of the bodj' ; the second anal spine much longer and 

 stronger than the third. Caudalis slightly convex. Uniform brownish ; 

 the dorsal, anal, and ventral fins black. 



Coasts of N.W. Australia ; East Indian Archipelago. 



a. Adult : very bad state. N.W. Australia. Presented by Sir J. 



Richardson. 

 h. Adult. From the Haslar Collection. 



c. Adult. From the Haslar Collection. 



d. Adult : deformed. Moluccas. Purchased of Mr. Frank. 



e. Fine specimen. Purchased of Mr. Frank. 



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



g. Half-grown. Madras. Presented by J. C. Jerdon, Esq, 



h. Fine specimen. China. Presented by Capt. Sir E. Belcher. 



Description. — This species is closely allied to D. crassispinum, 



