38 SQLAMiPINNKS. 



slender spurious interneiu-als. Each neural and intferneural of the 

 spinous dorsal is dilated into a transparent lamella, which in the 

 latter is broad enough to touch that of the spine next to it. The 

 anterior haemal and interhsemal spines show the same structure as 

 in Chcetodon meyeri. 



3. Chelmo lonprostris. 



Chaetodon longirostris, Broassonet. 



Chelmon longirostris, Cmv. <§• Val. vii. p. 89. pi. 175 ; Blcek. Vorhand. 

 Batav. Genootsch. xxiii. Chatod. p. 20. 



D. ^. A. ^. L. lat. 75. L. transv. 1?. 



The length of the snout is much more than one-half of that of 

 the head. A large triangular black patch covering the neck, the 

 upper surface of the head, and the side downwards to the level of the 

 inferior margin of the eye ; a round black spot at the posterior angle 

 of the anal fin ; caudal blackish. 



From Isle de France to Polynesia. 



a. Adult. Amboyna. Purchased of Mr. Frank. 



h. Adult : stuffed. Purchased. 



c. Adult : not good state. Old Collection. 



4. Chelmo pelta. 

 D. ^. A. -i. L. lat. 40. L. transv. 8/19. 



iy 15 



The length of the snout is not quite one-half that of the head. 

 Fniform reddish-brown, blackish on the sjiinous dorsal, a darker band 

 from the origin of the dorsal to the eye. 



Hah. ? 



a. From the Collection of the Zoological Society. 



Description of the specimen. — The height of the body is one-half 

 of the total length, the length of the head one-third. The upper 

 profile descends abniptly fi'om the origui of the dorsal fin, and is 

 concave. The snout is relatively shorter than in Ch. rostratus, 

 forming not quite one-half of the length of the head. The width 

 between the eyes is less than the length of their diameter. The 

 praeoperculum has the angle rounded and minutely serrated. The 

 dorsal spines are very strong and long, with the membrane between 

 deeply notched ; they increase in length to the fourth, which is 1| 

 in the length of the head ; the following spines gradually become 

 shorter to the last, which is rather shorter than the first ray. The 

 basal half only of the soft dorsal is covered with scales ; it is not 

 elevated, and has the upper margin nearly entirely vertically situated. 

 . The caudal is tiimcated. The second anal s])ine is stronger, but 

 scarcely longer than the third, and 1^ hi the length of the head. 

 The soft portion of the anal is much higher than the corresponding 

 pai't of the opposite fin, and covered with scales on the basal half 

 only. The ventral fins reach to the origin of the anal ; the pectorals 



