MÉMOIRE SUR LES SCIÉNOÏDES ET LES SILLAGINÖÏDES. 51 



Johnius Cantori Blkr. 



Descriptio Cantoriana sequens. 



«The length of the head is 4j in the total, its vertical diameter at the 

 occiput 1 of the length. The oblique diameter of the eye is oh in the 

 length of the head; the distance from the muzzle is less than the oblique 

 diameter. The verlical diameter in front of the dorsal fin equals the length 

 of the head. The dislance from the orbit, a cross the infraorbitals, exceeds 

 i of the diameter of the eye. The anterior teelh of the exlernal series of 

 the upper jaw are rather long and closely set; the rest are scarcely longer 

 than the rather hroad internal series of velvety teeth. Under the symphysis 

 of the lower jaw appear five pores. The lnwer part of the rounded margin 

 of the preopercle is dislinctly and distanlly toothed. The opercle terminates 

 in two flat spines. The lateral line is distinct ; on each scale appears a 

 small longiludinal tube from whence proceed an upper and lower oblique 

 process. Most of the scales of the sides have each a central oblique line. 

 The second anal spine is rather slrong, longitudinally radiated and f of the 

 lenght of the first ray. The caudal fin is rhomboidal somewhal rounded at 

 the point. — Head above and back dark greyish green, ligliter, silvery, on 

 the cheeks, opercles and sides, the scales minulely dolted wilh black, not, 

 however, sufficiently to influence the general colour; abdomen silvery; mem- 

 brane of dorsal spines transparent wilh black margin ; belween the anterior 

 six spines dolted ihroughout, and rather largely wilh black and brown ; be- 

 lween the four posterior spines the central part of the membrane wilhoul 

 dols; membrane of dorsal rays, caudal and anal yellowish while, minutely 

 dotled wilh brown and black, their marginal porlion blacki?h; pectorals and 

 ventrals vvhitish, the latter dolted wilh black, particularly tow^rds the mar- 

 gin. Iris silvery, dolled with black ; upper orbital half bluish black. B. 7. 

 1). 10 -i/23 P. 19. V. 1/5. A. 2/7. C. 5/17/5." 

 Syn Johnius maculatus BI. Schn. Var ? Cant., Cat. Mal. Fish. p. 68 (nee 



BI. Schn.). 

 Hab. Pinang, in mari. 

 Longitudo speciminis unici descripti. «5 inch." 



Rem. M. Günther a déja fait la remarque que Ie poisson décrit par Can- 

 tor soit probablemcnt d'une espèce fort-différente du Johnius maculatus BI. 



38* 



