Occasional Papers of the Mtisemn of Zoology 3 



Scales covering the entire tail of the fish, as well as a tri- 

 angular thoracic area, with its apex opposite the middle of the 

 pectoral fin ; none above, below and before this scaly area ; 

 scales becoming smaller toward margin of scaly area. Each 

 scale small, round, and imbricate, with dentate margins ; in 55 

 transverse series. Dorsal rays, V, 14; anal, 11. Spinous dor- 

 sal reduced not only in the number of rays, but also in size: 

 the first two spines, the longest, not quite two-thirds as long 

 as the interspace between the two dorsals, which is about as 

 long as the first dorsal base. Anal inserted posteriorly, its 

 origin equidistant from isthmus and from base of caudal. 



I'ody crossed by about seven dark shades, or irregular ver- 

 tical bars, which become wider and doubled posteriorly. Head 

 with conspicuous spots. Dorsal spines blackish ; second dorsal 

 and anal fins with dark spots ; caudal with a dark base ; paired 

 fins clear. 



^leasurements of type in millimeters (being made by use 

 of an eye-piece micrometer, the measurements are of the hor- 

 izontal projection of each structure) : total length to caudal, 

 15.0 mm.; greatest depth of body, 2.8; least depth of caudal 

 peduncle, 1.5; length of head, 4.8; depth of head, 2.'/; width 

 of head, 1.9; width of bony interorbital, 0.6; width of sub- 

 orbital, 0.5; length of orbit, 1.2; length of snout, i.o; length 

 of upper jaw, 1.5; distance from tip of snout to origin of 

 dorsal, 6.2; length of first or second dorsal spine, 1.7; distance 

 between origins of dorsal fins, 2.7; height of second dorsal, 

 2.1; snout to origin of anal fin, 9.8; length of first anal ray, 

 I.I ; length of longest anal ray, 1.8; snout to insertion of ven- 

 tral, 4.8 ; length of ventral, 3.0. 



