ATHEEIXA. 



to 



Depth of body 4§ to G^ times in total length, length of head 4 to 4| 

 times. Snont rounded, shorter than eye, which equals length of post- 

 orbital part of head and width of interorbital region ; latter flat, with 

 a low median keel ; lower jaw slightly projecting ; mouth extending to 

 below anterior fourth of eye ; teeth small, conical, in a narrow band. 

 Gill-rakers nearly as long as gill-laminae, 16-20 on lower part of 

 anterior arch. Dorsals VI-V1II, I 11-13; second dorsal widely 

 separated from first, originating above anterior third of anal. Anal I 

 12-13. Pectoral shorter than head, extending to above root of ventral, 

 which is in advance of first dorsal. Caudal deeply forked. Caudal 

 peduncle 2 to 3 times as long as deep. Scales smooth, 43-49 in 

 longitudinal series, 20-26 round body in front of ventral fins (not more 

 than 24 in var. wgyptia, Blgr.). Yellowish, with a silvery lateral stripe 



Atherina mochon, var. cef/ypt!a. 

 Egypt (F. N.). 



running along the fourth or fifth row of scales below the spinous dorsal 

 fin ; upper half of body with dark brown dots, which may be crowded 

 round the edges of the scales or form small blotches on the back ; 

 fins white. 



Total length 120 millim. (North African specimens do not exceed 75). 



Mediterranean, in some parts of North Africa and Southern Europe 

 in fresh-water lakes. — Types in Paris Museum. 



1-6. Ad. 



7-1 6. Ad. & hgr. 

 17-26. Ad. & hgr. 

 27-36. Ad. & hgr. 

 37-66. Ad. & hgr. 

 67-72, 73. Ad. & hgr. 



Mediterranean Coast oE Egypt. 



L. Menzaleh. 



Nr. Ghet-el-Nassara, L. Menzaleh. 



Gemil, near L. Menzaleh. 



L. Temsah, near Suez. 



Algeria. 



Dr. Riippell (P.). 

 L. Loat, Esq. (C). 



Sir R. Owen (P.). 

 Sir L. Playfair (P.). 



