eigenmann: the cheirodontin^. 17 



q. Premaxillary teeth but little expanded toward the tips, pointed, the median point a little 

 the larger; mandibulary teeth much expanded at the tip, with a small basal notch on 

 each side and three median points of about the same size; third suborbital in contact 



with the preopercle below; fontanel short 20. Holesthes Eigenmann. 



qq. Teeth of the upper and lower jaws similar; maxillary with a few broad-tipped teeth; 

 third suborbital in contact with the preopercle below. Caudal in the male naked or 

 with a row of scales reaching to the tip of the rays just below the shortest ones at the 

 middle 21. Odontostilbe Cope. 



Genus Grundulus'' Valenciennes. 

 Grundulus Valenciennes, Hist. Nat. Poiss., Vol. XVIII, 1846, p. 216. 

 Ctenocharax Regan, Ann. & Mag. Nat. Hist. (7), Vol. XX, 1907, p. 402. 



Type: Poecilia bogotensis Humboldt. 



Cyprinodontoid fishes, reaching a length of about 80 mm., found on the 

 eastern highlands of Colombia. 



Teeth all recurved, conical, in a single series on greater part of maxillar}^, on 

 premaxillary and mandible; third suborbital in the largest specimens a little wider 

 than the naked area around its convex border, narrower than the naked area in 

 the young; postorbital area naked; mouth small, maxillary just about reaching 

 the orbit; eye comparatively small, placed high; a wide naked strip from dorsal 

 to head, and another along middle of belly; dorsal placed behind the middle; origin 

 of ventrals near the middle; anal short; no adipose fin; pectorals not nearly 

 reaching ventrals; lateral line short; scales with very many faint, diverging radial 

 strise; no pseudo tympanum. Gill-rakers about 8 + 10, very short, about one-third 

 as long as eye; a few feeble interhaemals appearing as caudal fulcra; a larger num- 

 ber of interneurals, but equally feeble. 



1. Grundulus bogotensis (Humboldt). (Plate II, fig. 1.) 

 Native name "Guapuche." 

 Poecilia bogotensis Humboldt, Recherches sur les Poissons Fluviatiles, in Rec. 

 d'Observations, Zoologie et Anat. Comp., Vol. II, 1821, pp. 154 and 159, 

 pi. XLV, fig. 1. 

 Ctenocharax bogotensis Regan, Ann. and Mag. Nat. Hist. (7), Vol. XX, 1907, p. 

 403 (Bogota). 

 Range : The rivers of the plains of Bogota and northward in the streams of 

 Santander. 



5084, C. M., 12843, I. U. M., over one thousand specimens, largest 80 mm. 

 North of Bogota at Puente de Suba. Eigenmann. 



' Probably from, Grundules, an appellation of the Lares. 



