ZOOLOGY. 



27 N., long. 170 W; the other about a day's sail 

 from the Marquesas Group. 



THE SMALL. SPINED DOCTOR-FISH. 

 (Acanthurus Subarmatus, N. Sp.) 



This species may be regarded as a link between the 

 Chaetodon and Acanthurus genera ; since it possesses 

 only in a very rudimental form, the spine on the side of 

 the tail which distinguishes the latter from the former 

 family of fishes. 



Rays of the dorsal fin 33, 9 spinous. Pectoral 15. 

 Anal 23, 3 spinous. Body compressed, covered with 

 small scales. A very minute spine on either side of 

 the tail. Entire length of the specimen, five inches ; 

 depth, two and a half. Colour, dull-gray ; five vertical 

 black bands on the sides and tail. 



Taken on the coral reefs at Raiatea, Society Isles. 



THE ALBACORE. 

 (Scomber Germo ?) 



The albacore which came under our notice so fre- 

 quently during the voyage, bears some resemblance to 



