156 bulletin: museum of comparative zoology. 



roids were numerous and could be seen swimming slowly about near the surface. 

 They took bait readily ; even if a stone was thrown in they swam rapidly to 

 the spot. 



7. Rhamdia sacrificii, sp. nov. 



Plate 2. 



Types. — Two examples, No. 29073, Mus. Comp. Zool. Sacrificial Cenote, 

 near Chichen-Itza, Yucatan, Leon J. Cole. 



Head 4|; D. 1, 6; A. 10. Body stout its entire length; head large, flat, 

 little narrowed forward. Eye very high up, small, its diameter 7J in head. 

 Teeth in bands. The maxillary barbel reaches a little beyond the base of the 

 ventral fins. The mental barbel reaches about three fifths of the distance 

 to the pectoral, and the postmental a little beyond the base of the pec- 

 toral. Origin of spinous dorsal a little posterior to a vertical line from posterior 

 part of base of pectoral fin. Length of base of adipose dorsal fin 2f in total 

 length. The caudal fin is forked ; its lobes are bluntly rounded, almost trun- 

 cate. Ventral fins inserted a little caudad of the posterior limit of the spinous 

 dorsal fin. 



Color uniform dark slaty gray. The larger specimen is slightly more than 

 one foot in length. 



Unlike the preceding species, R. sacrificii appears to be a bottom form, and 

 was never seen at the surface. It also took the bait much less readily. 



8. Blops saurus Linne. 

 Two specimens from the Gulf of Mexico at Progreso. 



9. Sardinella sardina (Poey). 



Seventeen examples from the Gulf of Mexico at Progreso. 



10. Stolephorus brownii (Gmelin). 

 Thirteen specimens from the Gulf of Mexico at Progreso. 



11. Synodus foetens (Linne). 

 Two examples from the Gulf of Mexico. 



12. Fundulus grandis Baird & Girard. 



Eleven examples from La Cienaga near Progreso. 



The largest size mentioned by Garman (Cyprinodonts, p. 97) for this 

 species is six inches. Among this series, however, are several nearly ten inches 

 long. The upper surface of the head is extremely flat : the eye, when seen in 

 side view, has its upper edge elevated above the contour line of the head. It 

 is rather more elevated than is shown in Girard's figure (Mex. Boundary Surv., 

 2, p. 69, pi. 36). 





