Jordan and Ever mann. Fishes of North America. 2829 



Zygoneetes hemhalli, JORDAN, Proc. U. S. Nat. Mus. 1879, 237, San Sebastian River, Flor- 

 ida. (Type, No. 23449. Coll. Dr. James A.Henshall.) 



To the synonymy of Fundulus cingulatus add : 



Zygoneetes rubrifrons, JORDAN, Proc. TJ. S. Nat. Mus. 1879, 237, San Sebastian River, Flor- 

 ida. (Type, No. 23450. Coll. Dr. James A.Henshall.) 



Zygoneetes auroguttatus, HAY, Proc. TJ. S. Nat. Mus. 1885, 556, Westville, Florida. (Type, 

 No. 37362. Coll. Mann & Davison.) 



An examination of a large amount of material recently collected in Flor- 

 ida by Drs. Evormann and Kendall shows that the synonymy of these 

 species should stand as indicated above. 



Examination of the type of Gambusia arlingtonia shows it to be the 

 young of the form hitherto known as Z. henshalli, which, from an exami- 

 nation of the type and other specimens, proves to be the female of Fundu- 

 lus chrysotus. The dorsal in Gamlusia arlingtonia is not inserted so far 

 back as the sixth anal ray, but is rather over the third or fourth. Both 

 G. arlingtonia and Z. henshalli, agree with descriptions of F. chrysotus except 

 in coloration. Both are females, as shown by form of anal fin. All speci- 

 mens examined of the henshalli form are females, as shown in part by dis- 

 section and by the form of the anal fin. All specimens examined of the 

 form agreeing with descriptions of F. chrysotus prove to be males, as shown 

 partly by dissection and by the form of the anal fin. Front series of teeth 

 much enlarged in all; anal fin usually with 11 rays. 



The type of Z. rubrifrons difters from that of Z. henshalli in having a 

 heavier head, really longer snout, mandible more oblique, giving the 

 muzzle a truncated appearance, and the slope of the back to the snout 

 beginning farther forward. 



The type of Z. rubrifrons agrees with the description of F. cingulatus, 

 except in the number of anal rays, there being 10 instead of 8, as given 

 in the description, which is a redescription of the type of F. cingulatus. 

 Cuvier & Valenciennes, however, give 10 anal rays in the original descrip- 

 tion. Specimens in the United States National Museum labeled Zygoneetes 

 cinffulatus, from Pensacola, Florida, agree with the type of Z. rubrifrons, 

 with the exception of 1 specimen, which has 11 anal rays. 



National Museum specimens collected by Dr. Shufeldt at New Orleans, 

 labelled Zygoneetes chrysotus, contain both the Z. henshalli and Z. chrysotus 

 forms, i. e., those with pearly spots and no cross bars (females) and those 

 with dark cross bars (males) that is, male and female of Fundulus chry- 

 sotus. Comparison of specimens collected at Tampa and Welaka, Florida, 

 reveal 2 color forms. Most of those from Tampa have the heavier head, 

 truncated muzzle, and outlines of F. cingulatus. The 2 color forms are 

 those with dark cross bars, all males as shown by dissection and form of 

 anal fin. and those with no cross bars and no pearly spots, which are all 

 females. The majority of individuals have 10 anal rays each. 



Most* of the Welaka specimens have more slender and pointed head, pre- 

 orbital less deep, really shorter snout, and the curve of the body toward 

 the snout beginning farther back than in the preceding, and the majority 

 have each 11 anal rays. The 2 color forms represent the 2 sexes females 

 with pearly spots and no cross bars, and males with dark cross bars and 

 many with small brown spots. 



