19. DAKHU8. 85 



B. Scales of moderate size or large, forty or less in the lateral line. 



More than three and a half longitudinal series between the late- 

 ral line and the origin of the dorsal tin. 



1. Snout with pores or tubercles. 



a. Asiatic, p. 97. 



b, African, p. 98. 



2. Snout without pores or tubercles. 



a. African, p. 98. 



b. West Asiatic, p. 109. 



c. Indian. 



aa. The third dorsal ray is strong and serrated, p. 110. 

 bb. The third dorsal ray is strong, but smooth, p. 126. 

 cc. The third dorsal ray is not enlarged, p. 128. 



C. Scales large; three and a half longitudinal series between the 



lateral line and the origin of the dorsal fin. 



1. Indian. 



a. The third dorsal ray is enlarged and smooth, p. 129. 



b. No osseous dorsal ray, p. 133. 



2. African, p. 134. 



II. Normally two barbels. 



A. L. lat. 48-55. Eastern Asia, p. 135. 



B. L. lat 34-40. India and East Asiatic Islands. 



1. No osseous dorsal ray. India and East Asiatic Islands, p. 130. 



2. An osseous dorsal ray ; barbels simple. East-Indian archi- 



pelago, p. 137. 



3. Barbels fringed. East-Indian archipelago, p. 138. 



C. L. lat. 32 or less. 



1. Snout without tubercles. 



a. Mouth extending beyond the vertical from the front mar- 



gin of the orbit. East-Indian archipelago (Hampala), p. 139. 



b. Mouth narrow. 

 a. Asiatic. 



aa. The third dorsal ray is osseous and serrated, p. 140 

 bb. The third dorsal ray is osseous and smooth, p. 141. 

 cc. No osseous dorsal ray, p. 146. 

 /3. African, p. 148. 



2. Snout with tubercles. Africa ( Varicorhinus) p. 148. 



III. Barbels none. East Indies. 



A. L. lat. 34-35. East-Indian archipelago (with Siam), p. 149. 



B. L. lat. less than 30. East-Indian continent (with Ceylon), p. 151. 



