378 APPENDIX A. 
1. POLYPTERUS BICHIR, Geoffr. 
Two young specimens from Lake Rudolf, both belonging to 
the variety with ten spines, which also occurs in the Upper Nile 
and West Africa. 
2. CHROMIS NILOTICUS, Hasselq. 
Of this widely distributed species, the Bolti of the Nile, three 
specimens were in the collection. 
a. One from Lake Abaya, 24 cm. long; its scales are somewhat 
fewer in number than in typical specimens, viz., 27 along the lateral 
line. D. 48. 
6. One from Lake Stephanie, 16 cm. long. The teeth of this 
specimen are equally small as in the preceding specimen, but 
fewer in number, possibly owing to its younger age and less 
advanced growth of the jaws. D. +43. 
c. A young specimen from Lake Rudolf, 10 cm. long. D. 43. 
3. CHROMIS TRISTRAMI, Gthr. 
Specimens from Lake Rudolf cannot be distinguished from 
the types which were obtained in the oases of the Eastern Sahara. 
The teeth of this species are much broader and larger than those 
of the preceding species. 
a. A rather large specimen, but with the hinder part of the body 
decomposed, from Lake Rudolf (12.8.95). D. 43. 
6. Another, obtained in a dry watercourse some ten miles from 
Lake Rudolf (16.8.95), 15 cm.long. D. 44. 
4. CHROMIS SPILURUS, Giinth. Proc. Zool. Soc. 1894, p. 80. 
This species was discovered by Dr. Gregory in pools remaining 
in dried-up watercourses of North Giriama. Dr. Donaldson Smith 
found this species (30.12.94) under similar conditions near the 
Shebeli River, and (8.12.94) in water-holes near Sheikh Husein. 
All the specimens, those collected by Dr. Gregory as well as by 
Dr. D. Smith, are small, not exceeding 12 cm. in length. 
5. CLARIAS SMITHII, sp. n. 
Claritas lazera, Giinth. Proc. Zool. Soc. 1894, p. 89 (nec C. V.). 
Wi7O—73.. A. 56-02) Vea. 
Vomerine teeth granular, forming a very broad band, nearly 
