yjQ The Philippine Journal of Science i«« 



while in the other they are broken out but were originally in a 

 single row also. 



This is a delicate and slender eel with small head and weak 

 jaws, snout convex and rather bluntly pointed; posterior nos- 

 trils partly below front margin of eyes; lateral line prominent, 

 the pores beginning on neck; tail deeper than trunk. 



Color uniform brown, paler on belly, much paler on throat; 

 fins pale yellow brown, or else hyaline from the action of the 

 preservative. , 



No. 130, Bureau of Science collection, from Cavite, has the 

 following dimensions: Length, 444 millimeters; depth, 8; head, 

 26; trunk, 138; tail, 280; eye, 2.5; snout, about 5; gape, nearly 

 9 ; pectoral, 8. ' 



I have also placed here a specimen from the University of the 

 Philippines, supposed to have been collected at Cavite likewise, 

 which has a single instead of a double row of teeth on the vomer, 

 but which otherwise agrees with No. 130; its dimensions are as 

 follows: Length, 284 millimeters; head, 18; trunk, 84; tail, 182; 

 depth, 5.25. 



My material is slenderer than the specimens described by 

 Bleeker and others; they state the depth to be from 42 to 48 

 times in the length. As elsewhere noted, the teeth of the inter- 

 maxillary plate are exceedingly variable as well as subject to nu- 

 merous accidents, while the teeth occurring in two or more rows 

 are prone to individual variations and irregularities. 



Hitherto known only from Java and Sumatra ; it lives in the 

 sea and in brackish water. 

 Ophichthns manilensis sp. nov. Plate 5. 



Depth 51.69 to 54.2, head 17.68 to 16.6 in length; head 5 

 to 5.4 in trunk, the latter a trifle more than twice in tail; head 

 and trunk together 1.73 to 1.75 in tail, which is 0.63 of total 

 length. Eyes full, somewhat elliptical, 2 or 2.4 times in snout 

 and 12.4 to 15.2 in head ; snout 6.2 to 6.3 in head, its tip rounded ; 

 mouth large, extending beyond eyes, 3.1 to 3.4 in head; pectorals 

 large and rounded in life, 3.4 to 3.87 in head; origin of dorsal 

 over the beginning of the last fourth of pectoral. 



An elongate and very slender eel but with the body full and 

 rounded, the tail bulkier and deeper than the trunk, its trans- 

 verse diameter equal to its depth ; dorsal and anal fins low, less 

 than half the depth of body; lateral line starting on nape; pos- 

 terior nostrils just forward of a vertical line from eyes. Max- 

 illary teeth in one row or in two rows on posterior part ; teeth 

 of lower jaw in one row ; teeth on vomer in two rows or with 



