146 



TEANSACTIONS OF THE 



[Mar. 13 



I am under obligations to Dr. Basbford Dean, of the Depart- 

 ment of Biology, Columbia College, for material assistance in 

 determining the following anatomical descrijjtion of the Suna- 

 pee saibling : — 



Two specimens of 1 pound and 3 pounds respectively, were 

 carefully examined. 



FIN RAY FORMULA. 



DENTITION . ♦ 



(feebly developed as in the Irish charrs) 

 1 lb. specimen. 3 lb. specimen. 



Maxillary (superior and inf.) 

 13 and 14 



Pre or Intermaxillary 



4 and 5 

 Vomerine (very small) 



6 in number 

 Palatines (right and left) 



12 and 13 

 Glossal, 

 two rows of 4 



GILL R.\KERS. 

 (slender and longer than in the brook trout.) 



18 in lirst row 

 18 in second row 



16 



4 and 3 



2 and lai'ger 



13 and 13 

 5 and 4 



1 lb- specimen. 

 45 (small and short) 



9 on each side. 



PYLORIC CCECA. 



BRANCHIOSTEGALS. 



3 lb. specimen. 

 52 



lu young specimens, the gill-cover overlaps tbe root of the 

 pectoral ; not in adults. There are spots on tbe dorsal fin, and 

 attention should be called to a post-ventral dermal appendage . 



