166 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



extended ventral and the anal origin. The length of the middle caudal 

 ray measured from its anatomical origin is one-half the length of the 

 head. The caudal fin is nearly truncate when expanded, with the tips 

 very slightly produced. Scales about 100 to the anatomical origin of 

 the middle caudal rays. Between the lateral line and the origin of the 

 spinous dorsal fin there are about 16 or 17 scales, and about 30 below. 



Radial formula: D. XI, 17; A. 111,12; V. 1,5; gill-rakers, 3+9; scales, 

 16-100-30. 



The general color is violet-brown, with obscure bluish-white blotches 

 on the head and the body. A large dark blotch about twice as large as 

 the eye under the middle of the spinous dorsal. The margins of the 

 soft dorsal, anal, and caudal are dark ; the middle of the soft dorsal, 

 anal, and caudal obscurely yellowish. The pectoral is dark in its ante- 

 rior third, elsewhere yellowish. Ventrals dark. 



In coloration this species resembles greatly Bermudan specimens of 

 Trisotropis undulosus in the British Museum, but that species has a large 

 number (ca. 34) of gill-rakers. 



Measurements. 



TRISOTROPIS BONACf POEV. 



Current number of specimen 



liOcality 



Length to origin of middle caudal rays 



Body : 



Greatest height 



Greatest width 



Height at ventrals 



Least height of tail 



Length ol caudal peduncle 



Head: 



Greatest length to end of opercular flap 



Longest gill-raker . 



Greatest width 



Width of interorbital area 



Length of snout 



Length of operculum lo end of flap 



Length of maxillary 



Length of mandible 



Distance from snout to orbit 



Diametei- of orbit 



Dorswl (spinous) : 



Distance from snout 



Length of base 



Longest spine (foiirth) 



Length of first spine 



Length of second spine 



Length of last spine (tenth) , 



Dorsal (soft) : 



Length of base , 



Length of antecedent spine 



Length of first ray 



Length of longest ray , 



Length of last ray 



Anal : 



Distance from snout 



Length of base , 



Length of first spine 



Length of second spine 



Length of third spme 



Length of first ray 



Length of longest ray 



Length of last ray 



29991. 

 Jamaica, W. I. 



Millime- 

 ters. 



100 ths of 

 length. 



435 



137 

 54 



130 

 50 

 50 



168 

 16 

 65 

 30 

 36 

 65 

 68 

 87 

 44 

 21 



162 

 116 

 53 

 22 

 41 

 46 



118 

 40 

 51 

 55 

 32 



280 

 85 

 11 

 25 

 36 

 56 

 61 

 33 



314 

 12J 

 30 



Hi 



Hi 



38.6 



3.7 

 15 



7 



8.3 

 15 



15.6 

 20 

 10.2 



5 



37.2 



26f 



12.2 

 5.1 

 9.5 



10.6 



9.2 

 11.7 

 12.6 



7.4 



64.4 



19.5 



2.6 



5.7 



8.3 

 12.9 

 14 



7.7 



