39. POLYCAtrirs. 175 



38. PTYONOTUS*. 



Triglopsis, Girard, Cottoids of N. Amer. in Smithson. Contrib. Knowl. 

 iii. 1852, p. 64 (not Kroyer). 



Head rather broad and depressed, rounded in front ; body sub- 

 cylindrical, compressed posteriorly ; head and body with the skin 

 soft and naked ; lateral lane present. Two dorsals : the second very 

 elevated ; pectorals rounded, with the rays simple ; ventrals thoracic. 

 Jaws and vomer with villiform teeth ; none on the palatine bones. 

 Air-bladder none ; pyloric appendages in small number. 



Lake Ontario. 



1. Ptyonotus thompsonii. 



Triglopsis thompsonii, CHrard, Proc, Bost. Soc. Nat. Hist. iv. 1851, 

 p. 19, and Smiths. Contrib. I. c. p. 65. pi. 2. f. 9, 10, pi. 3. f. 22-25, 

 36-38. 



D. 7 I 18. A. 15. C«c. pylor. 7. 

 Dorsal fins separated from each other. {Glr.) 

 Lake Ontario. 



39. POLYCAULUSt. 



Synanceia, sp., Bl. Schn. p. 194 ; Cuv. 8f Val. iv. p. 440. 



Head broad, rather depressed, with the eyes directed upwards; 

 body subcylindrical anteriorly, compressed posteriorly. Praeoper- 

 culum armed. Scales none. One dorsal with flexible spines and 

 rays ; anal elongate ; pectoral appendages none. Villiform teeth in 

 the jaws only. Branchiostegals seven. 



East Indian Seas. 



1. Polycanlus elongatus. 



? Synanceia uranoscopa, Bl. Schn. p. 195 ; Cuv. &■ Val. iv. p. 458. 

 Synanceia elongata, Cuv. ^ Val. iv. p. 456 ; Bleeker, Verhand. Batav. 



Genootsch. xxii. Sclerop. p. 10. 

 breviceps, Richards. Voy. Sulph. Fishes, p. 71. 



D. 24-25. A. 15. Vert. 10/17. 



Form of the head and position of the eye as in Uranoscopus. The 

 upper surface of the head uneven ; cheek without groove. No vo- 

 merine teeth. Brownish (in spirits), with whitish dots ; pectoral 

 and anal with a broad blackish margin. 



East Indian Seas. 



a. Adult. Java. 



b, c. Adult. Madras. Presented by T. C. Jerdon, Esq. 



d. Half-grown. Madras. Presented by T. C. Jerdon, Esq. 



e. Half-grown. India. Presented by G. E. Waterhouse, Esq. 

 /. Adult. Sea of Pinang. From Dr. Cantor's Collection. 



g, h. Adult : skins. Sea of Pinang. From Dr. Cantor's Collection. 

 ?. Adult. China. Presented by J. R. Beeves, Esq. 



* From TTTvov, a fan, and vHjtos, back. 



t From TToXiJKcawXos, with many stems. (Anal with many rays.) 



