EHAMDIA. 133 



Here described from a large series of specimens, including the types of the species, 

 measuring from 95 to 280 mm. in total length. 



Pimelodus haronis-miillcri, Trosch., 1865 {Ehcmidia haronis-mulleri, Jord. & Everm. 

 Bull. U.S. Nat. Mus. xlvii. 1896, p. 151), is probably identical with P. guafemalensis. 



8. Rhamdia godmani. (Tab. xxi. fig. 1.) 



Pimelodus godmani, Giintli. Cat. Fish. v. p. 121 (1864) '. 



Rhamdia godmani, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 152'. 



? Rhamdia sacrificii, Barbour & Cole, Bull. Mus. Comp. Zool. 1. 1906, p. 156^ t. 2'. 



Depth of bod}' about 6 in the length, length of head 4 to 4i. Breadth of head Ij-H in its length, length of 

 snout 2| to 24, diameter of oj'e 5i to 7, interorbital width 2|- to 31. Lower jaw a little shorter than 

 the upper ; width of mouth about | the width of head. Maxillary barbel extending about to origin of 

 adipose fin. Head covered with smooth skin ; occipital process extending about -| of the distance from 

 its base to the origin of dorsal. 7 to 9 gill-rakers on the lower part of the anterior arch. Dorsal I 6 

 (exceptionally I 5); spine slender, fin rounded. Length of adipose fin 2| to .3 in the length of the fish. 

 Anal 11-13. Humeral process not extending beyond the middle of pectoral spine, which is 4 to | the 

 length of the fin and |- to | the length of head. Ventrals inserted behind the last dorsal ray, extending 

 I to I of the distance from their base to the origin of anal. Caudal deeply notched. Least depth of 

 caudal peduncle 2 to 2| in the length of head or 14 to 2 in the distance from anal to base of caudal. 

 Brownish ; dorsal dusky, with a pale band. 



Hah. Mexico 1 (iS'«/^<?), Yucatan 3 ; Guatemal.\, Baja Vera Paz ^ [Godman & Salviii), 

 Eio Motagua ^ (Salvin). 



Here described from eight specimens, including the types of the species, measuring 

 from 150 to 270 mm. in total length. 



'&^ 



9. Kliamdia microptera. (Tab. XXIII. fig. 3.) 



Pimelodus micropterus, Giiuth. Cat. Fish. v. p. 124 (1864) \ 



Rhamdia microptera, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 153 ^ 



Depth of body 6| in the length, length of head 4|. Breadth of head 1^ in the length, length of snout 24-, 

 diameter of eye 6, interorbital width 3. Jaws nearly equal anteriorly ; width of mouth rather more 

 than f the width of head. Maxillary barbel extending to middle of dorsal fin. Head covered with 

 smooth skin; occipital process extending -j of the distance from its base to the origin of dorsal. 7 gill- 

 rakers on the lower part of the anterior arch. Dorsal I G ; spine slender, fin rounded. Length of 

 adipose fin 2J in the length of the fish. Anal 13. Humeral process extending nearly to tip of pectoral 

 spine, which is | the length of the fin and Jr the length of head. Ventrals inserted behind the last dorsal 

 ray, extending ^ of the distance from their base to the origin of anal. Caudal deeply notched. Least 

 depth of caudal peduncle 21 in the length of head and l-i in the distance from anal to base of caudal. 

 Dark greyish ; fins dusky. 



Ilab. Guatemala, Rio San Geronimo ^ (Godman & Salvin). 



Here described from the type, a specimen measuring 170 mm. in total length. 



10. Rhamdia managuensis. (Tab. XXI. fig. 2.) 



Pimelodus managuensis, Giinth. Trans. Zool. Soc. vi. 1868, t. 474 \ 



Rhamdia managuensis, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 153 '. 



