CTENOTRYPAUCHEN 341 



Here described from a good specimen, 69 millimeters long, 

 collected by R. C. McGregor at Cagayancillo, one of the Ca- 

 gayan Islands in the Sulu Sea. Jordan and Richardson had 

 a specimen collected by Mr. McGregor at the same time and 

 place. 



This species has been collected at only two other places, as 

 far as I know. Bleeker had two specimens, 113 and 127 milli- 

 meters long, from a salt-water river at Sungi-duri, Borneo. 

 McGregor was the next to collect it, and Hora states (1924) 

 that Dr. Annandale "recently obtained two fine examples of the 

 same species in the Tale Sap, Siam." 



Genus 77. CTENOTRYPAUCHEN Steindachner 



Ctenotrypauchen STEINDACHNER, Sitzsungsber. Akad. Wiss. Wien 55 

 (1867) 530. 



This species has been collected at only two other places, as 

 separated by the structure of the ventral fins and the high, comb- 

 like keel, or sharp ridge, along the median line of the back 

 part of head ; the small ventrals are more or less notched, with 

 four or five rays, and form a sort of funnel; the many-rayed 

 second dorsal and anal are confluent with caudal; the minute 

 eyes scarcely visible; two rows of teeth in each jaw. 



A small genus, with one species each in China, Japan, and 

 the East Indies. 



172. CTENOTRYPAUCHEN MICROCEPHALUS (Bleeker) 



Trypauchen microcephalus BLEEKER, Dert. Bijdr. Vischf. Borneo, Act. 

 Soc. Sci. Indo-Neerl. 8 (1860) 62; GUNTHER, Cat. Fishes Brit. 

 Mus. 3 (1861) 137. 



Dorsal VI, 1-45 to 50 ; anal I, 43 to 44 ; scales in a longitudinal 

 series, 65 ; ventral, 1 to 4. 



The body laterally compressed, its depth nearly 9 times in 

 length ; the large head more strongly compressed than the trunk, 

 with a sharp ridge along median line above, 6.33 times in 

 length, its depth greater than that of body, or its own breadth, 

 the latter twice in its own length; the snout steeply inclined, 

 3.66 times in head; the eyes minute, covered with skin, the in- 

 terorbital elevated, 2.2 times in snout; the skin of head deeply 

 pitted, giving it a reticulated appearance; the mouth strongly 

 oblique, the chin and lower jaw very prominent, projecting, 

 the posterior angle of maxillary extending beyond eye; there 



