322 CYPEINODONTID^ 



of the length of the head. Snout broad, obtuse, with the lower jaw 

 slightly projecting beyond the upper ; mandible longer than the eye. 

 The diameter of the eye is less than the length of the snoTit, one- 

 fourth of that of the head, and one-half of the Avidth of the inter- 

 orbital space. The origin of the dorsal fin is midway between the 

 extremity of the caudal and the anterior or posterior margin of the 

 orbit, and corresponds to the sixteenth scale of the lateral hne. The 

 first anal ray corresponds to the third of the dorsal. Dorsal and 

 anal fins subquadrangular, of moderate height, the latter fin being 

 scarcely higher than long. Caudal fin subtruncate. Brownish above 

 and on the sides, each scale darker on the tip ; an indistinct dark 

 band along the middle of the tail. Fins immaculate, anal with the 

 lower margin whitish. 

 Guatemala. 



a-c. Males, 2| inches long. Lake of Atitlan. From Mr. Salvin's 

 Collection. 



7. Fundulus catenatus. 

 Poecilia catenata, Storer, Synopsis p. 178. 



I). 14. A. 15. V. 5. L. lat. 44. L. tranBv. 12. 

 The height of the body is contained five times in the total length 

 ^ without caudal), the length of the head thrice and two-thirds; the 

 oiameter of the eye is somewhat less than the length of the snout, 

 tiw^o-thirds of the width of the interorbital space, and one-fourth of 

 the length of the head. Dorsal fin as high as long ; its origin being 

 nearer to the extremity of the caudal than to that of the snout, and 

 in advance of that of the anal. Anal fin large, much deeper than 

 long (in a femaK). A brown line runs along each series of scales. 

 Alabama; Tennessee. 



We have had opportunity of examining only the female sex of 

 this species. 



8. Fundulus raajaUs. 



Mayfisch, Schoepf, Schrift. Gcs. Ntrf, Fi-eumJ. \\\i. p. 173. 



Cobitis majalis, Art., Walb. p. 12. 



Poecilia majalis, Bl. Schn. p. 453. 



Esox flavulus, Mitch. Lit. 4* Phil. Trans. Nero York, i. p. 439, pi. 4. 



Cvprinodon flavulus, Valenc. in Humb. Obs. Zool. ii. p. 164, pi. 52. 



"tigs. 3, 6, & 7. 

 Hydrarg}'ra trifasciata, Storer, Jotirn. Soc. Nat. Hist. Boston, i. 1837, 



p. 417. 

 flavula, Storer, Mem. Amer. Ac. v. pi. 25. figs. 5 & 6 ; Baird, 



Ninth Smithson. Report, 1855, p. 344. 

 Fundulus fasciatus, Dekay, New York Faun. Fish. p. 216, pi. 31. fig. 98 

 Hydrargyra majalis, Ciiv. 8f Val. xviii. p. 207. 



B. 6. D. 13-16. A. 11. V. 6. L. lat. 35. L. transv. 13. 



The height of the body is one-fourth of the total length (without 



caudal), the length of the head two-sevenths. Head low, and rather 



elongate, with the snout produced, the lower jaw scarcely projecting 



beyond the upper ; mandible longer than the eye. The width of 



