ON SOME NEW SPECIES OF AMERICAN AND AFRICAN FISHES. 



403 



Total length 8 in. 6 lin. ; end muzzle to base of caudal 6.75 in. ; same to base of anal 

 4.5; same to base of pectoral 2.2. 



Habitat. Near Parimaribo, Dutch Guiana. Dr. Hcring, Mus. Academy Nat. Sciences. 



Chirostoma beryllinum, sf. NOV. 



Form of body shorter than usual ; posterior margin of first dorsal far in advance of 

 second dorsal, and just in front of opposite first anal ray ; last anal a little behind last ray 

 of second dorsal ; tips of ventrals opposite first ray of first dorsal. Head 4.25 times to base 

 of caudal. Orbit large, one-third head ; mouth small, mandible slightly longer, curve 

 forming a quadrant. Greatest depth (in front of anal) six times in length to basis of 

 caudal. 



Scales large, ten longitudinal, thirty-six transverse rows ; lateral line represented by a 

 pore on the anterior part of the posterior field of each scale, except on the caudal peduncle, 

 where there is a groove. The anterior separated portion of the line is on two adjacent 

 scries of 5 — 4 scales each, lladial formula D. V, last well developed; I. 11. C. 17, deeply 

 furcate; A. I. 18; V. I. 5, four interior twice furcate; P. 15 acuminate. 



Total length 2.5 inches; end muzzle to base of first dorsal 1.06 inches. 



Color. Bright pale olive, a silver band from axilla to caudal on two half rows of scales, 

 leaden margined above ; basis of anal leaden. Sides of head silvery. 



Habitat. The only specimen I possess of this species I procured in the Potomac Iliver, 

 at Washington, D. C. 



GOBIUS DOLICHOCEPnAUTS. 



Intermediate between G. banana, C. V., and G. mcxicanus, Gthr. lladial formula D. 

 6—11, A. 1—10. 



Scales 68 in lateral line, 2l" rows between second dorsal and anal ; those in front of 

 dorsal fin minute ; head entirely naked. Caudal fin rounded, not elongate, one-sixth of 

 length. No canine teeth. Interorbital width equal diameter of eye, which enters head 

 5.5 times, and enters 2.2 in muzzle. End of maxilla opposite anterior margin of orbit. 

 Ventrals shorter than pectorals, falling far short of vent, with broad anterior connecting 

 membrane. Breadth of head greater than depth, and more than half length of head ; 

 depth of body one-sixth of total. Yellow olive above, with black marbling on the sides. 

 Spot at upper origin of pectoral, and upper angle operculum ; top of muzzle and edge of 

 lip black. First dorsal faintly, caudal strongly barred with black; second dorsal with 

 rows of black spots on each ray. Fins and surface below, yellowish. 



