BLENNIUS CRINITUS. 137 



viz. : »les excroissances en champignon" of the first and second 

 anal ray. 



6. Poecilia F'tt/K/gpo/Zf , nov. spec. (PI. 2, fig. 4 and 5). 



D. 8. A. 9. V. 5. P. 14 a 15. L. lat. 25—27. L. transv. 9. 



The height of the body is contained nearly four times 

 in the length with caudal fin (thrice without caudal). 

 The narrow part of the tail is half the height of the 

 body. Diameter of the eye one third the length of the 

 head. Distance between the root of the pectoral and the 

 tip of the snout as large as the height of the body. In 

 the females the anal fin 'is nearly opposite to the dorsal, 

 a very little behind ; in the males the anal fin is placed in 

 advance of the dorsal fin and transformed in an intromit- 

 tent organ , having the S^^^ , 4*h and 5*h ray much elongate , 

 and an adipose spooulike appendix on a small distance 

 from the tip of the fin (fig. 5). The second ray of the 

 ventrals is also much elongated and put against the anal fin. 



An outer series of large curved teeth with a band of 

 small conical teeth behind. Both the curved and the coni- 

 cal teeth, especially the former, have a brown colored top , 

 and are somewhat moveable , the underpart of the tooth 

 being inserted on an excrescence of the jawbone with a 

 kind of joint. 



The color of the back and of the tail is a yellowish 

 brown , the belly and the lower surface of the head being 

 silvery. Behind the interorbital region is a dark spot con- 

 tinued in a dark line, running along the median line of 

 the back up to the beginning of the caudal fin. Dark 

 colored lines, running along the margin of the scales, form 

 a dark brown reticulation on the back and the tail. A 

 blackish lateral line. Several specimens have 6 shadowy 

 crossbands on the tail. 



Two of the males with a round black spot (as large as 

 the eye) a little above and behind tlie root of tlie pectoral. 



Length of the largest female , measured with caudal fin 

 35 m.m. 



JVotes from the Leyden Museum , Vol. IX. 



