LOl'HOBRANCHII. 25 



Genus 3. CORYTHOICHTHYS, Kp. 



Diagn. — Body tolerably long, but tbe fins not much developed, 

 the tail-fin especially being diminutive. Snout half the 

 length of the head, which is elevated, rising from the laig 

 orbits. The dorsal fin commences in the concavity of the 

 tail over the anus, and is not placed on an elevation as in 

 Hippocampus or Trachyrhynchxs ; but the projecting edge 

 of the caudal border next the dorsal fin renders the breadth 

 of the fish there greater than elsewhere. Light cross-bars 

 vary the body. 



1. Corythoichthys albirostris, Heckel. 



Diagn. — Rostral crest medial and interrupted. Body-rings 12, 

 tail-rings 29 ; dorsal fin standing on 5 rings, four of which 

 belong to the tail. 



Descr. — Snout half the length of the distance between the 

 fore border of the orbit and the base of the pectoral fin. Colour 

 yellowish-brown, with 14 blackish cross-bars. Lower part of 

 the gill-cover brown with blue stripes. 



Rad.—P. 12 ; D. 2/ ; A. 2 or 3 ; C. 10. 



Length of the body 2*67 inches, of the tail 3*30 inches, of the 

 dorsal tin O'o' inch. 



Mexico, Bahia. One female specimen exists in the Vienna 

 Museum ; and the Museum of Stuttgard contains a male and 

 female procured by M. Blanschet. This pah are speckled with 

 dusky and light colours, and dotted with white. The small 

 intermediate scales are bordered with white, and all the three 

 examples have a white snout. 



2. Corythoichthys fasciatus, Gray. 



Syngnathus fasciatus, Gray, Ind. Zool. 89. f. 2. 

 Syngnathus hsematopterus, Bleeker, Descr. Pise. p. 34. 

 Syngnathus pictus, Hernpr. fy Ehrenb. {Berl. 8f Paris Mus.) 



Diagn. — Gill-cover divided into two dissimilar parts. Dorsal fin 

 standing on 5 rings, all of them belonging to the tail. Back 

 concave, with sharp borders, which form a projecting spine 

 on each ring. Belly broad and round, with a medial lon- 

 gitudinal keel. There are 17 rings before the dorsal fin, and 

 35 rings in the tail. The lateral line is straight and inter- 

 rupted. 



