402 Annals of the South African Museum. 



striated, 30-34 , 3-4 between lateral line and ventral, 14-16 round 



o 



caudal peduncle. 



Colour (of preserved specimens), brown above, yellowish or 

 silvery on sides and belly ; the markings are subject to considerable 

 variation. Usually there are 3 more or less distinct roundish or bar- 

 like spots on the body, the first 2 above the lateral line and situated 

 one in front and one behind base of dorsal, the third is at the base 

 of the caudal fin and is traversed by the lateral line. These spots 

 may sometimes be almost or entirely indistinguishable, or may be 

 reduced to 1 at the base of the caudal only ; they may all 3 be con- 

 nected by a dark band, or the last 2 only may thus be joined, 

 sometimes a narrow dark line only traverses the 3 spots. 



Forty-two specimens, ranging from 54-107 mm. in length, from 

 Dwaars Eiver, Transvaal. 



FIG. 60. Bctrbus trimaculatus. 



Three specimens, ranging from 74-85 mm. in length, from spruit 

 at Pietersburg, Transvaal. 



Three specimens, ranging from 73-96 mm. in length, from Six- 

 mile Spruit, Transvaal. 



Four specimens, ranging from 73-80 mm. in length, from Apjes 

 Eiver, Transvaal. 



Two specimens, 64 mm., 87 mm. in length respectively, from 

 Johannesburg, Transvaal. 



Five specimens, ranging from 71-86 mm. in length, from 

 Thabeni and Letsetelli Eivers, Zoutpansberg District, Transvaal. 



One specimen, 83 mm. in length, from Manzemntonto Eiver, 

 Transvaal (J. S. Hamilton). 



Three specimens, ranging from 70-76 mm. in length, from Sabi 

 Eiver, Transvaal (Major Stevenson Hamilton). 



Numerous specimens, ranging from 40-126 mm. in length, from 

 Ngwanetzi Eiver, Transvaal (J. S. Hamilton). 



