482 Mr. G. A. Boulenger on new 



measurements between the skulls of the type-specimen of 

 R. damarensis and the present subspecies : — 



JR. damarensis, R. d. variant, 



2 (skull imperfect). J. 



mrn. mm. 



Total length of skull 1 13 



Basal length 99 



Condylo-basal length 105 



Greatest width , 56 



Anterior edge of orbit to gnatkion 57 53 



Posterior „ „ „ . . 86 81 



Length of nasals 23-5 19 



Width „ „ 105 10 



Least width between orbits 41 38 



Upper cheek-teeth 38'6 39 



Length of palate in middle line .... 55 52 - 5 



Greatest width of palate 18 - 5 18*5 



Tip of nasals to gnathion 32 32 



Anterior part of interparietal suture 



to gnathion 89 84 



In the skull of R. damarensis variant there is a very well- 

 marked interparietal suture. 



Mr. Varian has very kindly presented the above specimen, 

 which includes skin, skull, and entire skeleton, to the British 

 Museum of Natural History. 



LIX. — Descriptions of Five new Cichlid Fishes from Africa. 

 By G. A. Boulenger, F.R.S. 



(Published by permission of the Trustees of the British Museum.) 



Tilapia steindachneri. 



Depth of body nearly equal to length of head, 2^ to 3 

 times in total length. Head a little more than twice as long 

 as broad ; snout with convex upper profile, as long as broad 

 or a little longer than broad, as long as postocular part of 

 head ; eye 3§ (young) to 4^ times in length of head, equal 

 to interorbital width or to suborbital depth ; mouth moderate, 

 about § width of head, extending to between nostril and eye; 

 teeth small, in 3 series, 40 to 60 in duter row of upper jaw ; 

 4 series of scales on the cheek, width of scaly part equal to 

 or a little less than diameter of eye. Gill-rakers short, 12 to 

 14 on lower part of anterior arch. Dorsal XLV-XV 12—13 ; 

 spines equal in length from the sixth or seventh, ^ to not 

 quite £ length of head ; longest soft rays about £ length of 



