778 MR. C. TATE REGAN ON ASIATIC [NoV. 9, 



Jificracanth'us Sauvage, fi'om the Ogowe, with III 7 dorsal and 

 IV 23 anal rays, appears to be closely allied to Ctenops and Betta, 

 but differs in having only 4 soft rays in the pelvic fin. 



Sy7iopsis of the Species. 



I. All the raj's of the dorsal and anal fius articulated 

 {Parophiocephal'us) . 

 a. Anal with 26 to 30 rays. 



Mrtxillarj' extending beyond middle of eye 1. macrostowa. 



Maxillary not extending bej'ond anterior edge of eye 2. unimaculata. 



h. Anal with 34 to 37 rays 3. hellica. 



II. Anal tin with one to four spines {Betta). 



A. All the rays of the dorsal fin flexible, articulated ; 

 maxillar\' extending to below nostrils or anterior 

 edge of eye. 



1. Anal with I 27 rays 4. alcarensis. 



2. Anal with II 25-29 rays. 



Length of head 3 to -Si (adult) in the length of the fish 5. pugnn.v. 



Length of head 3^ (young) to 3f (adult) in the length of the 



hsh 6. cinaJiatoides. 



3. Anal with II 21-24 rays T.fusca. 



li. First dorsal ray a more or less pungent spine. 



1. Maxillary extending to below anterior part of 



eye 8. hleelceri. 



2. Maxillary extending to below posterior nostril or 



anterior edge of eye. 



Anal with I 20 rays; 26 scales in a longitudinal series; 

 diameter of eye 4 in the length of head (in a specimen of 

 42mm.) 9. trifasciata. 



Anal with I 23 rays; 28 scales in a longitudinal series; 

 diameter of eye 3 in the length of head (in a specimen of 

 50 mm.) 10. maerophtludhia. 



Anal with II 20-22 rays ; 28 or 29 scales in a longitudinal 

 series ; diameter of eye 3^ to Z\ in the length of head (in 

 specimens of 50 to 60 mm.) 11. tcstiiata. 



Anal with III 21 rays; 30 scales in a longitudinal series; 

 diameter of eye 3| in the length of head (in a specimen 

 of 47 mm.) 12. riihra. 



3. Maxillary extending to the vertical from between 



the nostrils. 



Anal with II-IV 22-24 rays 13. sflendens. 



Anal with II 30 rays \^. fascicda. 



1. Betta macrostoma, sp. n. (Plate LXXVIII. fig. 3.) 



Depth of body 4 in the length, length of head 3. Snout 

 slightly longer than eye, the diameter of which is 4g in the 

 length of head ; interorbital width 24- in the length of head. 

 Maxillary extending a little beyond the middle of eye. Dorsal 11. 

 Anal 26. 32 scales in a longitudinal series. Two blackish 

 longitudinal bands from eye to caudal fin ; dorsal with series of 

 dark spots and with a large black ocellus near' the base posteriorly; 

 caudal with two blackish cross-bars ; other fins dusky. 



Hab. Sarawak. 



A single specimen, 80 mm. in total length, collected by 

 Dr. C. Hose. 



