NO. 4 IVIYERS AND WADE : NEW GENERA AND SPECIES OF EELS 67 



edge of nostril in contact with anterior border of eye, its edge slightly 

 raised, but not tubular. Just above the nostril is a large, well-developed 

 pore, with a diameter of slightly less than half that of the posterior nos- 

 tril ; the edge of the pore is in contact with the edge of the nostril. Upper 

 jaw only slightly projecting beyond tip of lower jaw. Upper lip with a 

 broad flange, developed into a high rounded flap, upturned against the 

 side of the snout and in its highest part reaching the lower edge of the 

 posterior nostril, and covering a hollowed-out area. The anterior end of 

 the flange is joined to the snout well above the mouth, on the same plane 

 as the upper edge of the anterior nostril. From this point the dorsal edge 

 of the flange curves upward until it reaches the lower edge of the posterior 

 nostril, then downward to the point at which the posterior end joins the 

 upper lip at a vertical through the pupil of the eye. The hollowed-out 

 area hidden by the flange flap is followed by a smaller, fully visible hollow 

 directly below the eye; this second hollow is separated from the first by a 

 slightly inclined, vertical partition. Lower lip with a broad flange, longer 

 than the upper but not developed into an extensive flap. 



Maxillaiy teeth in three irregular rows, closely united to the head of 

 the shaft of the vomer. Vomerine teeth in a roughly oblong patch, nar- 

 rower posteriorly. Premaxillary teeth in a semicircular patch anterior to 

 the symphysis of the lower jaw, and separated from the vomerine teeth 

 by a slight groove. Mandibular teeth in a narrow band. All teeth small, 

 pointed, fairly close set and subequal; in appearance they are villiform. 

 Tongue well developed, edges free anteriorly and laterally. 



Color light yellowish brown; back and sides peppered with minute 

 dark specks. Under sides of the head, except for tip of lower jaw, edge of 

 the upper lip, and an area between the jaws under the center of the eye, 

 without the dark specks. Distal half of lip flanges colorless. Dorsal fin 

 with a dark distal border anteriorly, becoming only a faint dark line on 

 the remainder of the fin. Anal and pectoral fins colorless. 



Genus ARIOSOMA Swainson 



Ariosoma Swainson, 1838, Nat. Hist. Fishes, Amphibians and Reptiles, 

 vol. 1, p. 220; — 1839, op. cit., vol. 2, p. 196 (no species men- 

 tioned ; this genus is evidently the same one which Swainson calls 

 Ophisoma in his second volume, and we therefore hold that its 

 type was designated by Bleeker, 1864, Atlas Ichthyologique, vol. 

 4, p. 20, when he indicated that Ariosoma=Ophisoma=Conger- 



