112 



Annals of tlie South African Museum. 



10. A transverse groove behind orbits, head rounded. Eyes 

 prominent and with a pronounced ridge over them. 

 D. xxxii-xxxiv 4-6, A. ii 21-24, V. i 2-3 



11. Dorsal with membranes of anterior spines notched, espe- 

 cially between 3rd and 4th spines. A transverse groove 

 behind orbits. Orbital tentacles very pronounced and 

 heavily fringed. Aspect fierce. D. xxxii-xxxv 5-6, 

 A. ii 22-24, V. i 3 



C. cottoides. 



C. tauru*. 



12. Dorsal low in anterior third, subequal posteriorly ; soft 

 rays nearly twice as high as spines. A slight trans- 

 verse groove behind orbits. Posterior nostrils prominent. 



D. xxxiv 9, A. ii 26, V. i 3 C. latipinnis. 



13. Anterior spines of dorsal erect and strong, further apart 

 individually, especially the 3rd and 4th, the remainder 

 generally subequal. Soft rays more elevated than spines. 

 Lips with perpendicular corrugations. D. xxxii-xxxiv 



10-14, A. ii 27, V. i 3 C. rolntttiix. 



14. Dorsal with 1st spine weak and generally shorter than 

 2nd ; membranes of soft rays transparent. Upper jaw 

 very protractile and its lip developed into a membranous 

 expansion. D. xxxix-xli 2-3, A. ii 24-27, V. i 2 . . C. vemistri*. 



15. Dorsal low anteriorly. Barbels on snout and chin. 



D. xxxix-xli 4-7, A. ii 27-29, V. i 2-3 C. capcnxi*. 



16. Dorsal with only one soft ray. Spines low anteriorly, 

 gradually increasing to about twice the height of the 1st. 

 Body slender and about uniform in depth for the greater 



part of its length. D. xliv-xlvi 1, A. ii 26-28, V. i 2 . . C. dorsalis. 



17. Dorsal joined to caudal by a membrane forming a deep 

 notch between them : first four spines a little further 

 apart individually. Body elongate. D. xlviii-xlix 3 -4, 



A. ii 33-36, V. i 3 



C. anguillaris. 



18. Similar to preceding, but head more pointed. Snout 

 conical. Longitudinal bands on body. D. xli-xliv 2-3, 

 A. ii 31, V. i 3 C. striatus. 



(2) No orbital tcntm-lcs. 



19. Dorsal with a notch between spinous and soft-rayed 

 portions. First 3 spines a little apart from others, 1st 

 and 2nd close together. Head blunt. D. xxix 9-10, 



A. ii 23-24, V. i 3 



C. brachycephalits. 



20. Dorsal with first 3 spines erect, strong, higher than suc- 

 ceeding and slightly further apart individually ; anterior 

 soft rays about 1 times height of adjacent spines. Scales 

 relatively distinct. D. xxxi-xxxiii 5-6, A. ii 21-24, V. 1 3 . . C. graminis. 



