85. I'ELOXROJ'HDS. 



321 



Month oblique, wide, the maxillary extending beyond the vertical 

 from the centre of the eye. Infraorbital l)ones very broad, espe- 

 cially the third, which is very large, although it does not quite reach 

 the pra^opercular margin. The last dorsal ray is vertically abov^e 

 the origin of the anal fin. The last six or eight anal rays arc short, 



only half as long as the ray preceding them. Caudal deeply forked. 

 Pectoral long, shorter than the head, and not reaching the root of 

 the ventrals. Scales thin, with numerous radiating striaj. There 

 are six longitudinal series of scales between the lateral Kne and the 

 root of the ventral fin. Uniform silvery. 

 Lake Nyassa. 



a. Skin, 20 inches long, type of the species. Presented by Dr. Kirk. 

 6. Skin, young. Presented by Dr. Kirk. 



2. Pelotroph'us microceplialTis. 



Giinth. I. c. 



D. 13. A. 19. V. 9-10. L. lat. 47. L. transv. 9/5. 



The height of the body is a little more than the length of the head, 

 which, is two-elevenths of the total (without caudal). The diameter 

 of the eye is one-fifth (in young examples) or one-eighth (in old 

 ones) of the length of the head, and about one-half of that of the 

 snout. Mouth oblique, rather wide, the maxillary extending some- 

 what behind the vertical from the centre of the eye. Infraorbital 

 bone, not reaching the pneopercular margin. The last dorsal ray is 

 vertically above the anterior anal rays. The last six anal rays very 

 short ; caudal fin deeply iorked. Pectoral fin of moderate length, 

 nearly as long as the head, terminating at a great distance from the 

 ventral. Scales rather thin, with numerous radiating stria3. There arc 

 two longitudinal series of scales between the lateral line and tbe root 

 of the ventral fin. The cutaneous sheath of each scale blackish. 



Lake Nyassa. 



a. Skin, 15 inches long, type of the species. Presented by Dr. Kirk. 

 h-c. Skins, 11-14 inches long. Presented by Dr. Kirk. 

 VOL. VII, y 



