48 LOPHOBRANCHII. 



2. Leptonotus semistriatns, Kp. 



Diagn. — Under the interrupted lateral line 19 cross stripes ; 

 above that line yellow spots with black borders. 



Descr. — Snout longer than the head, and when measured 

 from the fore angle of the eye, equal in length to the distance 

 from thence to the base of the pectoral fin. Body-rings 19. 

 Tail-rings 48. Dorsal standing on 1 rings, whereof three be- 

 long to the body. Colour yellowish-brown, the belly whitish. 



Rad.— P. 12; D.38; A. 3; CIO. 



Entire length 9 - 34 inches ; length of head 1 "46 inch ; of the 

 snout - 85 inch; of the tail 5"32 inches. Its greatest height is 

 - 67 inch, and its breadth O20 inch. 



The specimen is in the British Museum ; its origin is not 

 noted. 



Genus 7. SIPHONOSTOMUS, Rafnesque. 



Diagn. — Pectoral ring cleft on its ventral aspect in the middle 

 of its length. 



Descr. — A long and pretty thick fish, with a greatly compressed 

 snout, exceeding the head in length, and projecting evenly in 

 the plane of the forehead. The species inhabits the European 

 and African seas. 



1. Siphonostomus pyrois, Bonaparte. 



Siphonostomus pyrois, Bonap. Cat. Meth. p. 90. sp. 800. t. 5. 



f. 40. 

 Svngnathus pyrois, Risso, Hist. Nat. p. 180. 

 Svngnathus pelagicus, Risso, Ichth. de Nice, 63. 3. 



Diagn. — Snout the shortest and highest of the genus. The 

 space between the front of the orbit and the extremity of 

 the flat gill-cover bears a proportion to the length of the 

 snout up to the leaf-like prolongation of its lower piece, of 

 one to one and a half. 



Descr. — It has a higher hind-head than the other specie, and 

 the forehead is rough, but not concave. The seven edges of the 

 body are not toothed, and the dorsal fin standing on 8 caudal 

 rings is supported by from 31 to 34 rays. There are 17 body- 

 rings, or 18 if the pectoral ring be included, and the tail is com- 

 posed of 35 rings. This species is less slim than Rondeleti. 



