1920.] NATURAL SCIENCES OF PHILADELPHIA 133 



pharyngeal teeth 5, 4, 2-2, 4, 5; gill-rakers 4 + 16. Body elongate, 

 compressed, dorsal outhne nearly straight, ventral profile strongly 

 curved; abdomen compressed, pro- and post-ventral edge distinctly 

 carinated; head moderate, its dorsal outline fallen from the back; 

 interorbital space nearly straight; snout pointed anteriorly; mouth 

 terminal, oblique, maxillary scarcely reaching a vertical through 

 anterior border of nostril; jaws subequal, the lower more or less 

 projecting beyond the upper; anterior edge of lower jaw rather 

 sharp; eye large, anterior; nostrils close together, in font of the 

 eye above, the anterior in a short tube; pharygneal teeth slender, 

 canine-like; gill-rakers setiform, slender and long. Dorsal fin in- 

 serted nearer tip of snout than base of caudal, armed with two smooth 

 spines, first spine nearly half as long as the second, anterior ray the 

 longest; pectoral elongate, scarcely reaching the root of the ventral; 

 origin of ventral in advance of that of the dorsal, rather slender, 

 not reaching the vent; anal fin high, elongate, entirely behind the 

 dorsal, anterior ray the longest; caudal peduncle long, strongly 

 compressed, its depth 2.43 in head; caudal fin strongly forked, tip 

 of each lobe sharply pointed. Body covered with thin cycloid 

 scales; lateral line continuous, abruptly bending downwards above 

 the pectoral, thence extends backwards making a weak curve, run- 

 ning along the lower half of the tail. Color in alcohol grayish above, 

 belly and lower parts of sides silvery; fins whitish; caudal fin gray. 

 Total length 93 mm. 



Type, No. 49,953, A. N. S. P. Ako, collection of Eiji Matsuda. 



Differs distinctly from Cultriculus kneri in having 45 scales in the 

 lateral line. 



39. Oryzias latipes (Temminck & Schlegel). 



Kizan Island, Giran (abundant); Lake Candidius (15); Taiko, 

 Giran (4). 



40. Gambusia affinis (Baird & Girard). 



This American species was originally brought from Texas to 

 Hawaii, by Mr. Alvin Scale. Collected from rice -fields at Kwarenko. 

 As a result of artificial propagations enforced by the Government for 

 the purpose of extirpation of mosquitoes the present species is be- 

 coming very common in streams and stagnant pools of Formosa. 



41. Fluta alba (Zuiew). 



Shori, Toyen (1); Ako (2). 



42. Anguilla mauritiana Bennett. 



One from Ako and 5 from Shinkaiyen, Daito. 



