3, 8YMBRANCHtrS. 15 



Ophicardia xanthognatha, Richards. I. c. 



Apt(irigia saccogularis, Basilcwsky, Notiv. Mem. Soc. Nat. Mosc. x. 

 1805, p. 247, tab. 8. fig. 2. 



nigTotuaculata, Badlewsky, I. c. p. 248, tab. 2. fig. 2. 



immaculata, Basileivsky, 1. c. 



Tail narrow, tapering into a point. Vert. 100/88. 

 East-Indian archipelago ; Continent from Siam to Northern 

 China. Chinese Islands and Japan. 



or. Adult. Batavia. From Dr. Cantor's Collection. 



h. Large specimen, 35 inches long. Borneo. 



c. Half-grown. Borneo. 



f?-/7. Half-grown. Sarawak. Presented by the Marquis Doria, 



li, i. Half-grown. East-Indian archipelago. 



k, 1. Adult and young. Siam. 



m, n, o-p. Adult and half-grown. Formosa. From Consul Swin- 



hoe's Collection. 

 q, 7'-s. Half-grown. Chusan. From Dr. Cantor's Collection. T}'pos 



of S. (jrammicus. 

 t, u-v. Half-grown and young. China. 

 w. Half-grown. Hong Kong. From the Haslar Collection. 

 a?. Adult. Ningpo. Purchased of Mr. Cuming. 

 y-z. Half-grown. North China. Purchased of Mr. Jamrach, 

 o, /3, y-^. Adult, half-grown, and young. Japan. 

 e. HaLf-grown, Presented by Sir A. Smith. 



3. SYMBRANCHUS. 



Symbranchus, Block. 

 Unibrancliapertura, Lacep. 

 Ophisternon, M' Clcllancl. 

 Tetrabranchus, Sleeker. 



Body naked. Four branchial arches with well-developed giUs. 

 No accessory breathing-sac. " Gill-membrane free from the isthmus. 

 Palatine teeth in a band. 



Tropical America, East Indies to Australia. 



1. Symbranchus mannoratus. 



Mursena, sp., Gronov. Zoophyl. p. 39. no. 162. 



Synbranclius marmoratus, Bl. ix. p. 87, tab. 418; Bl. Schn. p. 524 j 



Kaup, Apod. p. 122. 

 immacidatus, Bl. ix. p. 87, tab. 419. fig. I j Bl. Schn. p. -'524, 



tab. 103. fig. 1 ; Kaup, Apod. p. 122. 



transversalis, Bl. Schn. p. 87. 



Unibranchapertura marmorata, Lacep. v. p. G-^S. 



immaculata, Lacep. v. p. 658. ■ 



grisea, Lacep. v. p. 658. 



lineata, Lacep. v. p. 658. 



Synbranchus fuliginosus, lianzani, Not\ Comm. Ac. Sclent. Lid. 



Bonon. iv. 1840, p. 75, tab. 11. fig. 1. 



