SOUTH AlIERICAN CHARACID FISHES — ^WEITZMAN 129 



Material Examined 



This study is based on the examination of the skeletal preparations 

 listed below. All specimens are alizarin preparations unless otherwise 

 noted. In addition, considerable reference has been made to osteo- 

 logical preparations listed in Weitzman (1962, pp. 11-17). The 

 methods of preparing specimens for osteological investigation are the 

 same as those I used earlier (Weitzman, 1954; 1962). 



The osteological drawings of Poecilobrycon harrisoni Eigenmann are 

 based on one specimen (Stanford University 50245), 36.4 mm. in 

 standard length. This specimen, together with eleven others, was 

 found in the collections of the Division of Systematic Biology of 

 Stanford University. These specimens had no data other than 

 "British Guiana, Georgetown." Six additional aquarium-reared 

 specimens (Stanford University 50244), 9.5 to 21.0 mm. in standard 

 length, were stained with alizarin and compared with the specimen 

 used for drawing. Since general proportions and shapes in the osteo- 

 logical drawings were dehneated by optical methods, some distortion 

 can be found in the figures. This is especially noticeable in figures 2-6, 

 wherein the anterior cranial and snout region is somewhat fore- 

 shortened. All illustrations are by the author. 



In the Ust below, CAS refers to the California Academy of Sciences; 

 CAS(IUM) refers to specimens belonging to the CaUfornia Academy 

 of Sciences but previously deposited at Indiana University and still 

 bearing an Indiana University number; SU refers to specimens be- 

 longing to the Division of Systematic Biology, Department of Bio- 

 logical Sciences, Stanford University; USNM refers to the United 

 States National Museum; ANSP refers to the Academy of Natural 

 Sciences of Philadelphia. 



Copeina guttata (Steindachner) : SU 51692, two (of four), SL 56.5-57.0 mm., 

 Peru, creek near Yurimaguas, November 1920, W. R. Allen. 



Copella nattereri (Steindachner): CAS 20743, four (of 35), SL 23.5-35.5 mm., 

 Brazil, State of Pard, Lagoa Grande [probably Lagoa Grande do Javari about 

 35 mi. northwest of Santar^m] July 17, 1924, Carl Ternetz. 



Erythrinus erythrinus (Bloch and Schneider) : SU 57678, four, SL 52.0-99.5 mm., 

 Peru, creek near Yurimaguas, November 1920, W. R. Allen. 



Hoplerythrinus unitaeniatus (Agassiz) : CAS(IU]VI) 17106, one (of four) , SL 97.0 mm. 

 Bolivia, Cuchuela [Cachuela] Esperanza, March 1922, N. E. Pearson; USNM 

 163188, one (of four), SL 86.9 mm., Venezuela, a few miles off Puerto Aya- 

 cucho, "Amazon territory," March 13, 1950, J. A. Rivero. 



Hoplias malabaricus Bloch: CAS(IUM) 17107, five, SL 31.0-108.0 mm., Bolivia, 

 Huachi, at junction of the Ri'o Bopi and Rio Cochabamba [Santa Elena], Rio 

 Beni basin, September-October 1921, N. E. Pearson; SU 3106, one, dry skele- 

 ton, cranium 31 mm. in total length, Brazil, Maraj6 Island, Rio Tocantins, 

 C. F. Hart. 



