NEW FISHES 



217 



Coloration in Life. — Above and on sides light olive-yellow, 

 vermiculated and spotted above with slate-blue; orbit with seven 

 radiating bluish stripes, the anterior one extending forward to mouth, 

 the two lower ones running obliquely across cheeks and opercles ; 

 sides with twelve rather narrow bluish transverse bars, not extending 

 on ventral or dorsal surfaces; a blackish humeral spot, slightlv smaller 

 than eye ; back crossed by four broad pinkish bands, the first beginning 

 behind the humeral spots ; ventral surfaces light yellow^, immaculate ; 

 fins olive, without spots, caudal fin and ventral disc edged wnth orange. 



There is considerable variation in the coloration. The collection 

 contains two small specimens which show five broad dark cross-bars, 

 as in A. zebra \ and some of the other specimens show faint traces of 

 the same markings. 



The young have all the mandibular incisors tridentate, as in the 

 adults of A. zebra. The small specimens collected by the Albatross 

 at Duncan Island and referred by Dr. Gilbert to A. zebra., were evi- 

 dently too young to show the specific characters of the teeth. 



Allied to A. zebra., differing in the truncate, unnotchcd median 

 mandibular teeth and somewhat in coloration. 



Numerous specimens were secured at Tagus and Iguana Coves, 

 Albemarle Island. 



MEASUREMENTS OF Arbaciosci truucata. 



Length in mm 



Head 



Depth 



Width of Head 



Eye 



Interorbital Width 



Pectoral 



Length of Disc 



Depth of Caudal Peduncle .. 

 Length of Caudal Peduncle 

 Caudal 



38 



30 

 19 

 27 



5 



8 



12 



27 



9 

 10 



17 



MALACOCTENUS ZONOGASTER sp. nov. 

 rl. XV. 



Labrisoniis delalandi Gilbert, Proc. U. S. Nat. Mus., xiii, p. 452, 1890, 

 Albemarle Island. 



Type. — Cat. No. 6352 Leland Stanford Jr. University Museum. 

 Iguana Cove, Albemarle Island. 



Diagnosis. — Dorsal spines XXI or XXII, first spine higher than 

 second, one and one half in eye ; whole lower surface heavily barred 

 and spotted with dark brown. 



