CLAE1AS. 291 



6 Bahr Tamiyeh, Fayum.— Loat, 6.10.99. 



1 Nile between Abu Tig and Assiut.— Loat, 1.12.99. 



2 Assiut.— Loat, 6.12.99. 



16 Nile at Luxor.— Loat, 22-29.10.00. 



24 At a regulator near Luxor.— Loat, 8.10.00-12.11.00. 



28 Nile between Luxor and Assuan. — Loat, 9-10.00. 



18 Assuan.— Loat, 7-30.9.00. 



3 Island of'Arko.— Loat, 16.4.00. 



3 Khartum.— Petherick, 1862. (Types of C. macracanthus.) 



4 Khartum. — Petherick, 1862. 



3 Karkoj, Blue Nile.— Loat, 7.12.01. 

 1 Fashoda.— Loat, 20.3.01. 



4 Gharb-el-Aish.— Loat, 5-14.4.01. 



1 Bahr Zeraf.— Capt. Flower, 25.3.00. 



3 Gondokoro.— Petherick, 1862. 



1 Gondokoro.— Loat, 16.2.02. 



1 Tsutyaba, L. Albert.— Budgett, 8.8.02. 



1 L. Albert Edward.— Moore, 1900. 



2 Gallaland, 130 m. west of Omo R.— Dr. Donaldson Smith, 1900. 



1 Sire River, at its junction with L. Abaia, 3000 feet.— Zapkiro, 4.9.05. 



1 Lake Chad.— Capt. Gosling, 1904. 



1 Niger.— Dalton, 1863. (Type of C. xenodon.) 



1 Abo, S. Nigeria. — Dr. Ansorge, 1902. 



1 Agberi, S. Nigeria. — Dr. Ansorge, 1902. 



1 Monsembe, Upper Congo.— Rev. J. H. Weeks, 1900. 



1 Upoto, Upper Congo.— Capt. Wilverth, 1897. 



3 Upper Congo. — Brussels University, 1899. 



v Fig. 26. 



Malformed head of Clarias lazera. 



The specimen from the Birket Karun presents a curious malformation. The head, 

 which is one-fourth of the total length without the caudal fin, is spherically swollen in 

 the frontal region, as shown in the above figure. 



2p2 



