0. DORTICHTHTS. 179 



5. UROCAMPUS. 



Body elongate, compressed, with distinct longitudinal ridges ; the 

 upper edge of the trunk continuous with that of the tail ; lateral line 

 continuous with lower caudal edge. Tail elongate, quadrangular, 

 tapering. Pectoral and caudal fins developed ; the dorsal is placed 

 entirely on the tail, at a great distance behind the vent. 



Manchuria. 



1 . Urocampus nanus. 



D. 15. Osseous rings ll+''>^^- 



Snout as long as the remaining part of the head, scarcely lower 

 than the forehead ; the supraorbital edges converge in front to form 

 the median ridge of the snout. Occiput and nuchal shields with a 

 slight ridge ; operculum smooth and thin. The length of the head 

 is ccmtained twice and two-thirds in its distance from the vent. 

 Osseous rings of the body thin, smooth, flexible, with the ridges well 

 developed, without spines. Tail tapering, very thin, twice as long 

 as the body. Dorsal fin occiipj-ing from the ninth to the twelfth 

 tail-rings ; pectoral and caudal fins very small ; anal none. 



Manchuria. 

 a. Female, 90 millims. long. Presented by A. Adams, Esq. 



0. DORYICHTHYS *. 



Dorjrhamphus, Choeroichthys, Doryichthys, et Micropliis, Kattp. 

 Belonichthys, Peters. 



Body with the ridges well developed. Pectoral and caudal fius 

 present. Dorsal fin long or of moderate length, opposite to the vent. 

 Humeral bones firmly united. Males with the lower edges of the 

 abdomen dUated, the dilated parts forming a broad groove for the 

 reception of the ova. 



Tropical seas ; some species living in fresh water. 



The species may be arranged thus :- — 



A. Lateral line interrupted. 



a. Dorsal fin with more than 60 rays, p. 180. 



b. Dorsal fin with less than 00 rays, p. 180. 



B. Lateral line passing into the lower edge of the tail. 



a. Dorsal nn with more than 60 rays, p. 181. 



b. Dorsal fin with less than 60 rays. 

 cc. Tail longer than body, p. 181. 

 13. Body longer than tail, p. 182. 



* 1 . Doryichthys pristipeUis, Kaup, Lophobr. p. 58.- — Hab. — ? 



2. Syngnathus deocata, Ham. Buck. Fish. Gang. p. 14; Gray. Ind. Zo'f. c 



fig. — Rivers of Northern Bengal and Beliar. 

 .'5. Microphis jagorii, Pcterf,, Monaf^ber. Ak. Wiss. Berlin, 18GS. p. 280. — 

 Samar.— D. 37. Om. rings 21 -f-LT). 



