68 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



muraena; and the type by subsequent designation of Bleeker is 

 therefore Ophisoma acuta Swainson, 1839, vol. 2, p. 396, which 

 equals Muraena balearica De la Roche). 



Ophisoma Swainson, 1839, op. cit., vol. 2, p. 334 (type O. acuta Swainson 

 =RIuraena balearica De la Roche, by subsequent designation of 

 Bleeker, 1864; see explanation under Ariosoma above). 



Congermuraena Kaup, 1856, Cat. Apodal Fishes, p. 71 (type Muraena 

 balearica De la Roche, by subsequent designation of Bleeker, 

 1864). 



Congrellus Ogilby, 1898, Proc. Linn. Soc. New South Wales, vol. 23, 

 p. 288 (type by original designation Muraena balearica De la 

 Roche ) . 



Upper lip with a flange, which is rather narrow and not developed 

 into a wide flap. No facial excavations above the upper lip. Bony facial 

 canals not sending processes into the flange of the upper lip. Teeth 

 pointed, not forming a cutting edge. Dorsal inserted over gill openings. 

 Snout pointed, somewhat longer than eye. Posterior nostril in advance 

 of eye, with which it is not in contact; a tubed pore above the posterior 

 nostril but not in contact with it. 



Key to Eastern Tropical Pacific Species 



la. Head and trunk 1.42 in tail; cleft of mouth 4 in head; maxillary 

 teeth in a single irregular row; mandibular teeth in a single row 

 posteriorly, medially in two rows and anteriorly in three rows; 6 to 

 8 teeth grouped at head of vomer and 2 or 3 small teeth on the 

 shaft (Coast of Colombia) A . vomerina, ntw sptcits. 



lb. Head and trunk 1.85 in tail ; cleft of mouth 3.4 to 3.8 in head ; teeth 

 in jaws in villiform bands; vomerine teeth in an elongate triangular 

 patch on head and shaft of the vomer (Cape San Lucas to northern 

 Colombia) A. gilberti (Ogilby). 



Ariosoma vomerina, new species 

 Plate 8 



Holotype. — AHF no. 10. 



Type locality. — Station 856-38, Port Utria, Colombia, dredged in 

 15-30 fms., mud and sand bottom, February 25, 1938. 



