310 CYPRINODONTID^. 



of the dorsal and anal fins in moderate number. Origin of the dorsal 

 fin in advance of that of the anal. Sexes not differentiated by modi- 

 fication of the anal fin. Intestinal tract? 



Southern parts of North America and Central America. 



For the knowledge of this genus and its species we depend entirely 

 on the accounts given by Gii'ard, which are not only most incom- 

 plete, but which prove so frequently to be incorrect: one thing 

 appears to be certain, that he has united in it species which can 

 hardly be kept together in the same natural genus. 



1. Lucauia veuusta. 



Limia venusta, Girard, U. S. 8p Mex, Bound. Ichthyol. p. 71, pi. 39. 



figs. 20-23. 

 Lucania venusta, Girard, Proc. Acad. Nat. Sc. Philad. 1859, p. 118. 



D. 13. A. 11. V. 6. 



The height of the body is about equal to the length of the head, 

 and two-sevenths of the total (without caudal). The origin of the 

 dorsal is midway between the extremity of the snout and the base 

 of the caudal. Origin of the anal opposite the middle of the dorsal. 

 Eeddish brown ; fins immaculate. {Girard.) 



Texas. 



7. HAPLOCHILUS*. 



Aplocheilus, McClell. Ind. Cypr. As, Res. xix. pp.301, 426. 

 Panchax, Cttv. ^ Val. xviii. p. 380. 



Zygonectes, Ac/assiz, in Sillim. Amer. Jmtrn. 1854, xvii. p. 353. 

 Micristius, Gill, Canad. Nat. 8f Geol. 1865, August. 



Snout flat, both jaws being much depressed. Bones of the mandible 

 firmly united ; upper jaw protractile ; both jaws with a narrow band 

 of villiform teeth t. Body oblong, depressed anteriorly, compressed 

 posteriorly. Dorsal fin short, commencing behind the origin of the 

 anal, which is more or less elongate. Intestinal tract but slightly 

 convoluted ; air-bladder present. 



East Indies ; tropical Africa ; temperate and tropical America. 



The species may be geographically arranged : 



a. Indian species, p. 311. 

 /3. African species, p. 312. 

 y. American species, p. 314. 



* 1. Aplocheilus melastigmus, McClell. Ind. Cyprin. pp. 301, 427. — Calcutta. 

 — D.7. A. 22. 



2. Aplocheilus, sp., McClell. I. c. pi. 55. fig. 4 ; A. macclellandii, Bleek. 



Cypr. p. 487 (name only). — Bengal. 



3. Fundulus cingulatus, C. # V. xviii. p. 197.— United States.— D. 8. A. 10. 

 Panchax pictum, C. ^ V., has proved to be identical with Betta trifasciata ; 



sefe Eleeker, Cyprin. p. 489. 

 t The vomerine teeth of Panchax are minute and rudimental, not offering a 

 character on which a genus may be founded. In one out of three specimens, 

 they are entirely absent. 



