180. Bathytroctes. 



181. Platjtroctes. 



liv. „ apus. 



182. Xenodermichthys. 



183. Leptoderma. 



184. Halosaurus. 



185. Nemiclitliys. 



186. Synaphobranchus. 



Iv. ,, pinnatus. 



187. Uroconger. 



Ivi. „ vicinus. 



188. Gymnomurasna. 

 Ivii. Diodon maculatus. 



189. Chilomycterus. 



IV. List of Oenera and Species common to the Mediteeeanean and Indian Fauntt, excluding the 



Atlantic. 



190. Lates. 



191. Diagramma. 



192. Crenidens. 



Iviii. „ forskalii. 



193. Uranoscopus. 



194. Lepidotrigla. 



195. Cristiceps. 



196. Synaptura. 



197. Odonto.stomus. 



198. Saurenclielys. 



To sum up : if we estimate the number of Indian genera of marine fishes at 

 350, and of species at 1200, then over 56 per cent, of the genera and close on 5 

 per cent, of the species are also found in the Atlantic-Mediterranean region. 



This does not include the Cephalochordate forms Amphioxus and Amjm- 

 metron. 



AmpJiioxus occurs in the tropical and temperate parts of the Atlantic, in 

 the Mediterranean, off the Indian and Ceylon coasts, and in the tropical and 

 temperate parts of the Pacific. 



Asyvimetron has only been found (1) in the West Indies and (2) off the 

 south-eastern coast of Papua. In the latter locality a species has recently 

 been discovered by Dr. Arthur Willey, who was at once attracted by the 

 singular fact of geographical distribution thus revealed. 



