328 MEMOIRS OF THE CARNEGIE MUSEUM 



Six specimens,'"' 45-51 mm. Mud-flats below Wismar. (C. M. Cat. No. 

 1316a-&; I. U. Cat. No. 11815.) 



Twenty-seven specimens/" 44-66 mm. Tumatumari. (C. M. Cat. No. 

 1317a-e; I. U. Cat. No. 11812.) 



Seventeen specimens," 43-59 mm. Crab Falls. (C. M. Cat. No. 1318a-e; 

 I. U. Cat. No. 11819.) 



Seven specimens,'- 41-57 mm. Christianburg. (C. M. Cat. No. 1319«-6; 

 I. U. Cat. No. 11816.) 



Two specimens, « 35 and 57 mm. Rockstone. (C. M. Cat. No. 1320a; 

 I. U. Cat. No. 11817.) 



Head 3.7-3.8; depth 3+; D. 11; A. 20 or 21; scales 5-32-3.5; eye 2.75-3; 

 interorbital slightly greater than eye. 



Brassy, fins dusky. A very large and very conspicuous, vertically oval, black 

 spot, bordered behind with rusty or milk-white, occupies all of the base of the 

 caudal. 



185. Mcenkhausia coUetti (Steindachner) . 

 Tetragonopterus collettii Steindachner, "Flussfische Siidamerika's," iv, 1882, 



33, pi. 7, fig. 3 (Obidos; Hyavary). — Eigenmann and Eigenmann, Proc. 



U. S. Nat. Mus., XIV, 1891, 53.— Ulrey, Ann. N. Y. Acad. Sci., VIII, 1895, 



281. 

 Mcenkhausia collettii Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 



1910, 438. 



Nineteen specimens, 43-58 mm. Wismar. (C. M. Cat. No. 1325a-e; I. U. 

 Cat. No. 11804.) 



Five specimens, 34-39 mm. Alalali. (C. M. Cat. No. 1326a-&; I. U. Cat. 

 No. 11807.) 



One hundred and twenty-six specimens, 40-61 mm. Rockstone. (C. M. Cat. 

 No. \?,21a-z; I. U. Cat. No. 11810.) 



Twelve specimens, 37-59 mm. Cluck Island at Rockstone. (C. M. Cat. 

 No. 1328a-c; I. U. Cat. No. 11800.) 



Five specimens, 41-56 mm. Crab Falls. (C. M. Cat. No. 1329a-6; I. U. 

 Cat. No. 11808.) 



=' One of these has the lateral line interrupted. 



*" Out of twenty-four in condition to be examined two have the lateral line complete on both sides; two 

 have it complete on one side; fourteen have the lateral line incomplete, developed on from eleven to twenty- 

 three scales, and in the remaining six it is interrupted. 



<i Lateral line developed on from twelve to twenty scales. 



■•^ Lateral line developed on from nine to eleven scales. 



" Lateral line incomplete. 



