PETROCEPHALUS. 49 



a level with lower border of eye ; eye large, longer than snout, f to f 

 interorbital width. Dorsal 29-33, originating above 3rd to 10th ray of 

 anal, its length IJ to 2 times in its distance from head. Anal 31-37, 

 equally distant from base of ventral and from base of caudal. Pectoral 

 pointed, f to | length of head, twice as long as ventral, and extending 

 beyond base of latter. Caudal with pointed lobes. Caudal peduncle 

 2i to 3 times as long as deep, f to | length of head, 39-50 scales 

 in lateral line, ^2-ih ^^^ transverse series on body, jlj{j| in transverse 

 series between dorsal and anal, 10-12 round caudal peduncle. Silvery, 

 greyish on the back; extremity of anterior dorsal rays brownish or 

 blackish. 



Total length 195 millim, 



Nile and Chad Basins, Niger. 



1-3. Ad. & hgr. Lower Nile. J. Petlierick, Esq. (C). 



4. Skel. „ „ 



5. „ „ Dr. Riippell (C). 

 0-8. Ad. Rosetta Nile, near Barraoe. L. Loat, Esq. (C). 

 9. Ad. Nile S. of Cairo. „ 



10-10. Ad. & liftT. Wasta, Lower Nile. 



20-23. Ad. & hgr. Beni «ouef, „ „ • 



24-29. Ad. & hgr. Sanliur, „ „ 



30-31. Ad. Lahnn, Bahr Yiisiif, Faynm. „ 



32-34. Ad. Between Assiout and Abu Tig. „ 



35-37. Ad. Luxor. „ 



38—40. Yg. Begulator near Luxor. „ 



41. Hgr. Between Luxor and Assuan. „ 



42-45. Ad. Near Assuan. „ 



40-53. Ad. & hgr. Khartum. J. Petherick, Esq. (C). 



54. Hgr. Oindurnian. L. Loat, Esq. (C). 



55-00. Ad, AVad Medine, Blue Nile. „ 



OL Ad. Kosaires, „ Capt. S. Flower (P.). 



02-05. Ad. & hgr. Between Khartuniand Sobat R. Mr. P. C. Zaphiro (0.) ; 



W.N. McMillan, Esq.(P.). 



06. Hgr. Fashoda, White Nile. L. Loat, Esq. (C). 



07. Ad. Tewfikyeh, „ „ 



68-09. Ad. Yo R., Lake Chad. Capt. G. B. Goring (P.). 



70. Ad. Jebba, Ui)per Niger. Capt. G. F. Abadie (P.). 



2. PETROCEPHALUS SAUVAGIL 



AIor7nt/n/s {P etroC' phalus) sanvayii, Bouleng. Ann. & Mag. N. H. (5) xix. 1887, 



p. 149. 

 Moniiynis r>/j>niioi<Ies (non Geoff r.), Perugia, Ann. Mus, Geneva, xxx. 1891, p. 976. 

 VOL. I. jfi 



