TILAPIA. 



515 



Measurements (in millimetres). 



Total length 



„ (without caudal) . . . 



Greatest depth of body . 



Length of head 



Width of head 



Length of snout 



Diameter of eye 



Interorbital width 



Length of last dorsal spine 



„ longest soft dorsal ray 



„ third anal spine 



„ longest soft anal ray . 



„ pectoral 



110 



100 



90 



80 



33 



29 



33 



28 



16 



15 



8 



7 



11 



10 



8 



7 



11 



12 



17 



17 



11 



11 



16 



17 



30 



27 



64 



22 



22 



11 



5 



8 



5 



9 



12 



10 



12 



21 



Lake Victoria. Seven specimens were obtained at Bunjako by Mr. E. Degen, 

 5-14.11.05. 



A female with large eggs in the ovaries has the mouth filled with embryos measuring 

 8 or 9 millimetres and provided with a large yolk-sac* 



This species has been named after Mr. James Martin, Transport Officer in the 

 Uganda Protectorate, in recognition of much assistance rendered to Mr. Degen. 



2. TILAPIA LACRIMOSA. 



(Plate XCI. fig. 3.) 



Boulenger, Ann. & Mag. N. H. (7) xvii. 1906, p. 450. 



Depth of body twice and a half to three times in the total length, length of head 

 three to three and one-fifth times. Profile of snout straight or slightly convex; 

 diameter of eye equal to the length of the snout and to the interorbital width, once 

 and a half to once and two-thirds the least width of the praeorbital, and three and 

 one-third to three and a half times in the length of the head ; mouth moderately 



3u2 



