2. SYNONATnUS. 169 



with a slight swelling in the middle. Shields without spines. Body 

 half as long as the tail. Vent below the middle of the dorsal fin, 

 which stands on six rings. Caudal fin rudimental. Egg-pouch ex- 

 tending over eighteen rings. 

 Zanzibar ; China. 



«, b. Several adult specimens (types). Zanzibar. From Lieut.-Col. 



Playfair's Collection. 

 c. Adult. China. Presented by Vice-Admiral Sir E. Belcher. 



B. Operctdum crossed by a ridge in its entire length. 



28. Syngnathus grayi. 



Halicampus conspicillatus, Kaup, Lophobr. p. 22 (not Jenyns). 



gi'ayii, Kaup, ibid. 



Syngnathus koilomatodon, Bleek. Act. Soc. Sc. Indo-Neerl. v. Japan, 

 V. p. 10, tab. 1. fig. 1 (young). 



D. 20. Osseous rings 18-1-35. 



Base of the dorsal fin elevated. The length of the snout is less 

 than one-half of that of the head ; it is provided with series of 

 minute spines ; forehead rather high, its profile abruptly descending 

 towards the snout. Occiput and neck elevated into a crest ; eyes 

 large, prominent ; edge of the orbit rough. Operculum with ra- 

 diating striae, and a strong ridge bent upwards ; humerus with a 

 trihedral prominence. Body not deeper than broad ; shields with- 

 out spines, but the ventral edges of the caudal rings forming the 

 pouch are horizontally dilated. Tail one-half longer than the body. 

 Vent below the middle of the dorsal fin, which stands on four rings. 

 Caudal fin very small. Egg-pouch at least half as long as the tail. 

 A deep-brown spot on the side of the fourth body-ring. 



Japan ; Australia ? 



a. Six inches long : type of the species. (The original label, indi- 



cating the locality of this specimen, is lost.) 



b. Four inches long : type of S. hoilomatodon. Nagasaki. From 



Dr. Bleeker's Collection. 



Dr. Kaup has confounded this fish with the common S. coiispicil- 

 latus of Jenyns. 



29. Syngnathus tetrophthalmus. 



Syngnathus andersonii, Bleek. Nat. Tyds. Ned. Ind. xv. 1858, p. 466. 

 tetrophthalmus, Bleek. Nat. Tyds. Ned. Ind. xv. 1858, p. 467. 



D. 20. Osseous rings lG-17-1- 27-28. 



Operculum crossed by a faint but distinct ridge*. Head and 

 snout short, the latter turned iipwards, and as long as the postorbital 

 part of the head. A ridge along the median line of the nuchal 

 shields. Body scarcely deeper than broad, with the ridges very i)ro- 

 miiient ; shields without spines. Tail twice as long as the trunk 

 (without head). Dorsal fin commencing slightly in advance of the 



* Tliis has been overlooked hr Bleeker. 



