76 MEMOIRS OP THE CARNEGIE MUSEUM. 



42. Cheirodon madeirae, sp. nov. (Plate XIII, fig. 1.) 



6847, C. M., one, 34 mm. San Joaquin, Bolivia. Sept. 4, 1909. Haseman. 



A small-mouthed species, without color-markings. 



Head 4; depth 3; D. 11; A. 23; scales 10 + 24; ten scales between dorsal 

 and ventrals; eye 2.4 in the head; depth of caudal peduncle nearly equal to its 

 length. 



Moderately compressed; preventral area rounded, with a median series of 

 twelve scales; predorsal area rounded, with a median series of eleven scales; 

 occipital process extending about one-seventh to the dorsal; skull convex; frontal 

 fontanel a little longer than broad, less than half the length of the parietal; mouth 

 minute, maxillary about half the length of the eye; premaxillary with five teeth, 

 maxillary with two; mandible with broad, seven-pointed teeth, the median point 

 being a little the longer; cheeks covered by the third suborbital, leaving a narrow 

 naked wedge behind; postorbitals nearly covering the entire postorbital area. 

 Gill-rakers 7 + 11. 



Origin of dorsal equidistant from tip of snout and base of caudal; origin of 

 anal under posterior part of dorsal. Caudal peduncle with about nine weak 

 interhsemals ; ventrals not reaching anal; the pectorals reaching beyond origin of 

 ventrals. Scales as in other species of the genus. No color-markings. 



43. Cheirodon piaba Lutken. (Plate XIII, fig. 2; Plate XVII, figs. 5-6.) 

 Cheirodon piaba Lutken, Oevers. Dan. Selsk. No. 3, 1874, p. 134 (Rio das Velhas); 



Velhas-Flodens Fiske, 1875, p. xiv and p. 219, fig. on p. 221 (Rio das Velhas); 



Eigenmann & Eigenmann, Proc. U. S. Nat. Mus., Vol. XIV, 1891, p. 54; XJlrey, 



Ann. N. Y. Acad. Sci., Vol. VIII, 1895, p. 291; Eigenmann, Reports Princeton 



Univ. Exped. Patagonia, Vol. Ill, 1910, p. 429. 

 Tetragonopterus bellottii Ulrey {non Steindachner) : in part, Ann. N. Y. Acad. Sci., 



Vol. VIII, 1895, p. 286 (Santarem). 

 Cheirodon insignis Ulrey {non Steindachner) : in part, I. c. 291 (Brazil) ; Eigenmann 



& Kennedy, Proc. Acad. Nat. Sci. Phila., 1903, p. 515 (Arroyo Trementina & 



Arroyo Pypucu). 

 Cheirodon calliurus Boulenger, Boll. Mus. Torino, Vol. XV, 1900, p. 370 (Caranda- 



sinho near Corumba. San Lorenzo, Prov. Jujuy, Argentina); Eigenmann, 



Reports Princeton Univ. Exped. Patagonia, Vol. Ill, 1910, p. 429. 

 Cheirodon interruptus Eigenmann & Kennedy (non Jenyns), Proc. Acad. Nat. Sci. 



Phila., 1903, p. 514 (C'ampo Grande; brook near Arroyo Trementina); 



Ann. Carnegie Mus., Vol. IV, 1907, p. 126 (Puerto Max); Eigenmann & Ogle, 



Proc. U. S. Nat. Mus., Vol. XXXIII, 1907, p. 9. 



