10 Dr. A. Giinther on the 



cans, again, seems to be a different fish, as it is stated to have 

 pterygoid teeth (Liitken, Vid. Medd. Kjob. 1874, pp. 193- 

 199). 



In very young specimens, i. e. in specimens from 6 to 8 

 inches long, the maxillary barbel reaches to the root of the 

 caudal, whilst it reaches only to the anal fin in specimens 10 

 inches long, and in older examples it is still shorter (cf. Stein- 

 dachner, SB. Ak. Wien, lxxiv. 1877, pp. 599-602). 



20. Piramutana macrospila, sp. n. (PL II.) 

 D. 1/6. A. 11. 



Closely allied to Piramutana pantherina and Piramutana 

 albicans. Head granulated above ; occipital process longer 

 than broad, extending to the dorsal scute. An elliptical patch 

 of pterygoid teeth (PI. II. D) ; vomerine teeth none. Eye ot 

 moderate size, half the width of the interorbital space; upper jaw 

 longer than the lower; the maxillary barbel reaches to the origin 

 of the anal fin. Adipose fin much longer than the dorsal ; but 

 the distance between the two fins is less than the length of the 

 dorsal. Dorsal spine rather longer than that of the pectoral 

 fin, but shorter than the head. Body with four or five longi- 

 tudinal series of round blackish spots ; also the upperside of 

 the head and the dorsal fin are spotted. 



One specimen, 15 inches long. 



21. Pimelodus macidatus, Lac. 



22. Pimelodus gracilis, Val. 



23. Pimelodus labrosus, Kroy., Ltk. 



24. Pimelodus platanus , sp. n. 

 D. 1/6. A. 12. P. 1/13. 



Head covered with thin skin above ; occipital process nar- 

 row ; no praxlorsal scute. Adipose fin rather high, its length 

 being two ninths of the total (without caudal) and equal to 

 its distance from the fifth dorsal ray. Maxillary barbels ex- 

 tending to the origin of the adipose fin, the outer ones of the 

 mandible beyond the root of the pectoral. 



The height of the body is rather less than the total length 

 (without caudal) ; the length of the head a little more than 

 one fourth ; snout rather long and spatulate, with the upper 

 jaw much projecting beyond the lower. The eye occupies 

 nearly the middle of the length of the head, has free orbital 

 margins, and is about half of the width of the interorbital 

 space ; its diameter is one ninth of the length of the head. 



