DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA. 421 
and three-fourths in the base of the former, and in that interval are three scales ; its 
length is less than that of the first. The ventral equals the distance of the hinder 
margin of the orbit from the snout. The tubes of the lateral line have slender branches 
diverging from them, generally directed obliquely upwards. The larger scales have six 
radiating strie. The colour is light greenish brown above, with an indistinct silvery 
spot at the centre of each scale. Below the lateral line, especially between it and the 
anal fin, the colour is rose. The dorsal fins covered with spots of the colour of the 
back. ‘The others are immaculate. 
Two specimens, the longest of which is 74 inches long, were collected by Capt. Dow 
on the Pacific coast of Central America. 
47, CHRYSOPHRYS CALAMUS. 
A fine example, 16 inches long, has lately been sent by Capt. Dow from Panama. 
49, CIRRHITICHTHYS RiVULATUS. (Plate LXXXVL. fig. 4.) 
Cirrhites rivulatus, Valenc. Voy. Vénus, Poiss. p. 309, pl. 3. fig. 1 (bad). 
D, iq A. GL. lat. 47. L. transv. 6/14. 
The height of the body is contained thrice in the total length (without caudal), the 
length of the head twice and two-thirds. The snout is of moderate extent, compressed 
and rather elevated ; the maxillary extends beyond the front margin of the eye.  Inter- 
orbital space deeply concave, and half as wide as the orbit; a low longitudinal median 
crest on the crown of the head. Preoperculum finely serrated behind. The fourth. 
fifth, and sixth dorsal spines are the longest, two-sevenths of the length of the head, all 
are of moderate strength. Seven simple pectoral rays, none of which extend so far 
backwards as the ventral fin. The second anal spine is longer, but scarcely stronger, 
than the third. Brownish, with transverse dark brown bands and spots, all of which 
are edged with light blue, There are two of these bands on the head crossing the 
_preoperculum ; five on the body and tail, composed of large, more or less confluent, 
round spots ; especially the third and fourth terminate above each in a pair of large 
spots, the first pair occupying the end of the spinous and commencement of the soft 
dorsal, the second the basal portion of the end of the soft dorsal. Caudal and anal fins 
with similar ocellated spots; a brown band across the inner side of the root of the 
pectoral. ; 
A single example of this beautiful species, 5 inches long, was obtained by Capt. Dow 
at Panama. The typical specimen was obtained at the Galapagos Islands. 
51, PoLYNEMUS MELANOPOMA, 
Ginth. Proc. Zool. Soc. 1864, p. 148, 
Dy. Blsrpmthaceen du lat, 73. 
Nine free pectoral appendages, the longest of which extends to the vent. Preoper- 
