894 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



The young are produced iu early summer, when about one-third of an 

 inch long.* 



{Reterandria patrueUs B. & G. Proc. Acad. Nat. Sci. Phila. 1853, 390; Grd. U. S. 

 Mex, Bound. Surv. Iclitli. 72: Gambusia speeiosa, graciliti Grd. Proc. Acad. Nat. Sci. 

 PMla. 1859, 121 : Heterandria affinis B. & G. 1. c. 390: Gambnma humilis and affinis Gthr. 

 vi, 335, 336: Heterandria holhrooli Agassiz MSS. ; Girard, Proc. Acad. Nat. Sci. Philii. 

 1859, 61; Giiuther, vi, 334: Haplochilus melanops Cope^ Proc. Amer. PMl. Soc. Phihi. 

 1870, 457: Zygonectea atrilatus Jor. & Brayt. Bull. U. S. Nat. Mus. xii, 84, 1878.) 



Pages 345, 346. Oamhnsia humilis and Gamhima affinis may lie suj)- 

 pressed as identical with G. patnielis. 



Page 346. After Gambusia nohilis add : 



566 {h). G. seisilis Grd. 



Brown, sides with dark specks; vertical fins speckled. Ventrals very 

 small, not reaching vent; anal rather large. Head 5 in total length. 

 D. 9; A. 10. L. 2^ inches. Chihuahua River. 



(Girard, Proc. Acad. Nat. Sci. Phiia. 18.-9, 121.) 



Page 347. Under MolUenesia latiinnna read: 



"Eye greater than snout, 2 in head, If to 2 in interorbital width." 

 "Caudal-membrane dark orange, with black dots." "D. 14 or 15; A. 



8." 



Page 347. After MolUenesia latiinnna add: 



567 {h). M. lineolata. (Grd.) J. & G. 



Color of M. latijpinna, the sides with five dark half-bars. Eye small, 

 3^ to 3^ in head. Dorsal fin rather small, its rays 13 (rarely 14) in 

 number; otherwise essentially as in 31. latipimia, of which it may be a 

 variety. Marshes and lagoons of Louisiana and Texas. 



(Pwcilia lineolata Grd. U. S. Mex. Bound. Surv. Ichth. 1859, 70: lAmia pceciloides Grd. 

 1. c. 70.) 



Page 352. Instead of Esox salmoneus read : 

 S^d. E. usnbrosiis Kirt. 



The Esox vittatus and E. salmoneus appear, from Rafinesque's manu- 

 script notes, to have been mythical. 



Page 355. Instead of Murccna melanotis, which is not yet known tc) 

 occur in our waters, substitute: 

 57§. M. retifera Goode & Bean MSS. 



Body moderately stout, somewhat compressed. Teeth of upper jaw 



* Among the genera of Cyprinodonts, only those which have the anal fin in the male 

 modified are Imotvn to be viviparous. The others (Cyprinodon, Funduhis, Zygonectes, 

 etc.) are probahlj^ all oviparous. 



