53. PIMELODUS. 129 



27. Pimelodus pentlandii. 



Pimelodus pentlandii, Cuv. fy Vol. xv. p. 183. pi. 435 (adipose fin too 

 long). 



D. 1/6. A. 12. P. 1/9. V. 6. 



Head covered with thin skin above ; occipital process very short. 

 Adipose fin long, its length being contained four times and two-thirds 

 in the total (without caudal) ; it is not much longer than its dis- 

 tance from the dorsal. Maxillary barbels extending on to the root 

 of the ventral, the outer ones of the mandible to the middle of the 

 pectoral. 



The height of the body is contained five times and two-thirds in 

 the total length (without caudal), the length of the head four times. 

 The lower jaw is scarcely shorter than the upper ; the band of inter- 

 maxillary teeth is about seven times as broad as long. The diameter 

 of the eye is two-fifths of the width of the interorbital space. Dorsal 

 fin with the spine very feeble, somewhat higher than long. Pectoral 

 spine slightly serrated along both qdges, two-fifths of the length of 

 the head. Caudal fin cleft to the base. Coloration uniform ; dorsal 

 blackish, with a rnore or less distinct whitish band across the basal 

 portion. 



High Peru. 



a-b. Two of the typical specimens, 11 inches long. From Mr. Pent- 

 land's Collection. 



A skeleton in Hyrtl's Collection, named P. pentlanati, has 16 

 abdominal and 24 caudal vertebras (Denkschr. Acad.Wiss.Wien. 1 859, 

 xvi. p. 16). 



28. ?imelodus humilis. 

 D. 1/6. A. 12. P. 1/9. V. 6. 



Head covered with thin skin above ; occipital process very short. 

 Adipose fin long, its length being contained four times in the total 

 (without caudal) ; its distance from the dorsal "'s two-thirds of its 

 length. Maxillary barbels extending on to the root of the ventral, 

 the outer ones of the mandible to that of the pectoral. 



The height of the body is contained six times and a third in the 

 total length (without caudal), the length of the head four times and 

 two-thirds. Upper jaw a little longer than the lower ; the band of 

 intermaxillary teeth is eight times as broad as long ; the diameter of 

 the eye is one-half of the width of the interorbital space, and one- 

 sixth of the length of the head ; the eye occupies the third sixth of 

 the latter. Dorsal fin with the spine very feeble, rather higher than 

 long. Pectoral spine slightly serrated along both edges, two-fifths 

 of the length of the hea.d. Caudal fin cleft to the base, with the 

 upper lobe more pointed than the lower. Coloration uniform ; dorsal 

 blackish, with a whitish band across its basal portion. 



Venezuela. 



«, b-c. Seven inches long. 



