68 M0EMYRIM5. 



The following is a list of the specimens examined : — 



3 Lower Nile.— Euppell, 1833. 



2 Lower Nile. — Griinther's M. geoffroyi. 

 1 Nile near Cairo. — Loat, 18.3.99. 



1 Bought in Boulak Fish Bazar, Cairo. — Loat, 20.3.99. 



3 Bern Souef.— Loat, 1-17.9.99. 



3 Between Beni Souef and Biba. — Loat, 6.9.99. 



1 Biba.— Loat, 28.8.99. 



2 Lahun, on the Bahr-el-Yusuf, Fayum. — Loat, 5.10.99. 

 14 At regulators near Luxor.— Loat, 23.10.00, 3-10.11.00. 



2 Khartum.— Petherick, 1862. 



1 Nur-ed-Daim, White Nile.— Loat, 6.1.01. 

 5 Fashoda.— Loat, 18.3.01. 



2 Mouth of Lake No.— Loat, 25.2.01. 



The result of counting the dorsal and anal fin-rays in these forty specimens is, for 

 the former, 77, 84, 90 once, 76, 78, 86, 89 twice, 79, 83, 87, 88 three times, 80, 81, 

 82, 85 four times ; for the latter, 21 once, 20 ten times, 18 thirteen times, 19 sixteen 

 times. The two specimens from the Lower Nile, which on account of the low number 

 of dorsal rays (76, 78) I previously referred to Peters's M. longirostris, I must now 

 unite with M. caschive. They may be regarded as establishing a passage between the 

 latter and M. kannume *. 



Kaschive and Eischuve are Arabic names attributed to this fish by Hasselquist and 

 Eiippell. Other names are given above, under the head of M. kannume. 



Both M. caschive and M. kannume are the Oxyrhynchus of ancient Egypt : sacred 

 fish, and as such not used as articles of food. Wilkinson regards the Oxyrhynchus as 

 the same fish as the Mizdeh. 



4. MORMYRUS NILOTICUS. 

 (Plate XL fig. 2.) 



Centriscus niloticus, Bloch, Schneider Syst. p. 113, pi. xxx. fig. 1 (1801). 

 Mormyrus geoffroyi, Cuvier & Valenciennes, Hist. Poiss. xix. p. 240 (1846). 

 Mormyrus niloticus, Boulenger, Proc. Zool. Soc. 1898, p. 816. 



It is very doubtful whether the specimens answering to the description and figure 

 of Schneider are anything more than individuals of M. caschive in which the snout 

 instead of being bent downwards is directed straight forward, its upper profile being 



* As pointed out in my last Eeport on the Fishes of Lake Tanganyika (Tr. Zool. Soc. xvii. 1906, p. 546), 

 M. longirostris, which is known from the Zambesi, the Congo, and Lake Tanganyika, is so closely related to 

 M. caschive that it should perhaps be regarded as merely a variety of the Nile species. The dorsal rays 

 number 71 to 75. 



