28 CATALOGUE OF FISH. 



Length of the head measured to the base of the pectoral, 0-75 

 in. Of pectoral, 036 in. To anus, 254 in. Length of tail, 

 4-65 in. 



China (British Museum). Macassar (Leyden Museum). 



? Quid Sphagebranchus catostomus, Bl. cd Schn. Syst. p. 536. 

 Rostro acuto cirrhis 4, capite poris 2^erfarato ? 



Habitat in mari insulam " Otahaite " amhiente. 



Genus 20. CALLECHELYS, Kaup. 



Short oval head, straight depressed snout, and very short man- 

 dible. Fore nostril tube dependent; the liinder one situated under 

 the eye, and furnished with a small flap. No pectorals. Highly- 

 developed dorsal ; less expanded anal. Only a solitary nasal tooth, 

 which is large, elongated, blunt, and inclined backwards. Eight 

 teeth implanted in the elliptical palatine bone, which are short, 

 slender, and curved. About 10 vomerines, of wliich the 6 anterior 

 ones are stouter, and are ranged in two rows. Twenty-four teeth 

 stand on the entire border of the mandible. 



56. Callechelts Guichenoti, fig. 13. 



This handsome eel is named in honour of a man to whom I owe 

 a deep debt of gratitude for the friendly assiduity with which he 

 furthered my labours in the Paris Museum. 



The whole body is dotted and freckled with black, on a dark blue, 

 or perhaps greenish, ground-colour. Towards the end of the tail, 

 the black predominates. Fins white, with a broadish irregular 

 black border. 



Whole length, 18-70 in. Length of tail, 6-90 in. 



Otahaite. (Paris Museum by M. Dubois.) 



Genus 21. ICWYEYKVU^, Barnaville. 



Destitute of all the fins. Snout elongated like that of a dog- 

 fish, with a short pointed mandible. Towards the beginning of the 

 under plane of the snout are situated the very singular large, 

 round, outwardly-dentated tubes of the fore nostrils, whose borders, 

 like the unfolded bud of a flower, are curved inwards. The hinder 

 nostril opens in a slit of the inner lip. Eyes situated over the 

 middle of the jaws. Body destitute of fins, showing in place thereof 

 a sunken cutaneous furrow. Lateral line very distinct, and fur- 

 nished with pores, which are placed widely distant from each other. 

 Teeth very fine, small, and incurved. Nasal teeth placed in the 

 middle of a slit of the rostral skin. Vomerines one-ranked. 



