90 MUK.3£NID^. 



77. Ophichthys gracilis. 

 Opliisuraphis gracilis, Kaiq), Apod. p. 29. 

 Body slender ; tail rounded, longer than the body. Fins none. 

 Anterior nostrils not denticulated. "The punctiform eyes are si- 

 tuated nearer to the poiut of the snout." l^o vomerine teeth (?). 

 Length to the angle of the mouth 0-24 inch, to the giU-openiug 

 0-(;7 inch, to the anus 4-02 inches; length of tail 5-81. {Kaup.) 



Hab. ? 



78. Ophichthys acutirostris. 



Ichthyapus acutirostris, Brk. de Baniciilh; Hev. Zool. 1847, p. 219; 

 Kaiip, Apod. p. 28. 



Body slender, tail rounded, longer than the body ; fins none. 

 The border of the anterior nostril is deuticidated ; it is at the lower 

 side of the snout. Eye over the middle of the jaws. Length to 

 the gill-opening 0-79 inch, to the anus 4' 14 inches ; length of tail 

 4-92 inches. 



Open sea, under the equator. 



Ninth Group. PTYOBRANCHINA. 



22. MOEINGUA. 



Moringua, Gray, Zool. Misc. p. 9. 



Raitaboura, Grai/, I. c. 



Ptyobranchus, 31' Clell. Cede. Jouni. Nat. Hist. v. p. 200. 



Aphthalmichthys, Kaup, Apod. p. 105. 



Pseudomoriugua, &c., Bleek. Atl. Ichth. Mur. p. 14. 



Body scaleless, cylindrical, with the trunk much longer than the 

 tail. Pectorals none or small ; vertical fins but little developed, 

 limited to the tail. Posterior nostrils in front of the small eye. 

 Cleft of the mouth narrow. Teeth uniserial. Heart placed far 

 behind the branchifc. Gill-openings rather narrow, inferior. 



East Indies ; Feejee Islands ; Japan. 



1. Moringua raitaborua. 



Miu'fena raitaborua, Ham. Buch. Fish. Gam/, pp. 25, .364. 

 Rataboura hamiltonii, Gray, Zool. Misc. p. U. 



hardwickii, Gray, I. c. ; and III. Ind. Zool. c. fig. 



Ptyobranclius arundinaceus, M' Clell. Calc. Journ. Nat. Hist. v. p. 2U0, 



pi. 10. fig. 1. 



guthriauus, M' Clell. I. c. p. 201, pi. 10. fiir. 2. 



. erytlireus, M' Clell. I.e. pi. 9. fig. .3 (half-grown). 



multidentata, M'' Clell. I. c. pi. 9. fig. 4 (half-gi-own). 



brevis, M' Clell. I. c. p. 223 (young). 



parvidentata, 31' Clell. I. c. p. 202, pi. 9. fig. 5. 



gracilis, M' Clell. I. c. pi. 9. fig. 6 (yoiuig). 



Anguilla (Moiiugua) raitaborua, Ca7it. Nat. Tyds. Ned. Ind. iv. p. 228, 



tab. 1. 

 Moringua raitaborua, Bleel;. Verh. Bat. Gen. xxv. Beny. &(■ Hind. 



p. 154; Kaup), Apod. p. 10(i. 



