34 Annals of the Carnegie Museum. 



Pcecilocharax bovalii 10 gen. et sp. nov. 



(Native names Guabia and Wabeak.') 



Types, 43 mm. cf and 40 mm. ?. ( No. n 36 Carnegie Museum 

 Catalog Fishes. ) Creek at Savannah Landing. 



Cotypes, over two hundred and twenty specimens, Creek at Savannah 

 Landing. (C. M. C. No. 1137, a-z\ I. U. Cat. No. 1 1686.) 



Cotypes, 3 specimens, 34-45 mm. Holmia. (C. M. C. No. 1138, 

 a ; I. U. Cat. No. 11671.) 



Cotype, 1 specimen, 38 mm. Two hours below Holmia. (C. M. 

 C. No. 11390. ) 



Cotypes, 63 specimens, 22-47 mm. Creek at Tukeit. (C. M. C. 

 No. 1040, a-z ; I. U. Cat. No. 11672.) 



Head 3-3.5 ; depth 3.2-3.3 ; D. 16 ; A. 11 ; scales 27-30, 9 be- 

 tween dorsal and ventral ; 6 with pores ; eye equal to the snout, 3.5-4 

 in the head ; interorbital almost equal to the eye. 



Compressed, ventral profile gently and evenly arched. Dorsal out- 

 line rather steep to near the dorsal fin. Preventral and predorsal areas 

 narrowly rounded, scaled. 



Occipital process short, the fontanel large, oval, separated from the 

 small frontal fontanel by a convex bridge on a level with the rest of the 

 skull ; suborbitals narrow, leaving most of the cheek naked. Mouth 

 small, maxillary-premaxillary border 2.8 in the head; maxillary not 

 quite equal to the eye. Teeth all long, tricuspid, in a single series, 

 about eleven teeth in the premaxillary, about five teeth in the maxillary 



Gillrakers 7 -f 9, about equal to the pupil. 



Origin of dorsal nearer snout than caudal, its rays of nearly uniform 

 height, none prolonged. Anal considerably shorter than the dorsal, its 

 middle rays highest, reaching in the male to middle of caudal ; origin 

 <of anal under one of the last four dorsal rays ; origin of ventrals and 

 dorsal equidistant from snout ; tips of ventrals reaching to the anal in 

 male, the ventrals slightly shorter in the female. Pectorals not quite 

 reaching ventrals. 



10 I take pleasure in naming this species for the family Bovalius. Dr. Bovalius was 

 for several years in charge of the Essequibo Exploration Company, stationed at Holmia 

 on the Guiana Plateau. His brother Dr. Ed. Bovalius is at present in charge of the 

 Company's interests at Tumatumari. 



Except for the kindly help of Dr. Edwin Bovalius and Mr. G. Linnell my trip from 

 Tumatumari to the Kaieteur and beyond would have been practically impossible. 



