80 PROCEEDINGS OF THE ACADEMY OP 



ia others shorter than the palatine. Neither Cuvier nor Richardson could 

 eparate American specimens as a distinct species from the European pike. 



Esox n o b i 1 i o r Thomp. 



Hist. Vermont, and Proc. Bost. Soc. N. H. 1850, 305, where this is rightly 

 stated to be the eslor of Richardson. It is also evidently estor of Agassiz, Am. 

 Journ. Sci. Arts, xvi. p. 308, and formerly of Kirtland, but later correctly 

 named by the latter, Cleveland Annals of Science, 1854, p. 78 ; also E. lucioides, 

 Agass. and Gir., in Frank Forester, by Herbert. Fine specimens from Saginaw 

 Bay, No. 228. A specimeu is in the Academy Museum from the Alleghany River, 

 ia Warren Co., Pa., and another was presented by Thaddeus Norris, from 

 Conneaught Lake, Crawford Co., Pa. The head of the latter measures 12 in. 

 9 1. in length, and 17*6 in circumference at the preopercles. 



The Esoces ohioensis Kirtl , and lineatus and lugubroms of Leseur (C. V. vol. 

 18) can hardly be said to be described, while the vermiculatw of Leseur, and 

 villains and salmoneus of Rafinesque, may be recognized in the localities where 

 first taken, if existing. Leseur's specimens were taken in the Wabash. 



Trutta namayc ush Penn. Saginaw Bay. 



Thymallus tricolor, sp. nov. 



Muzzle slightly rounded in profile, as long as diameter of orbit; under jaw 

 slightly longer. Cranium rather broad above, median ridge strong to nasal 

 region. Eye just one-fourth length to opercular border. End of maxillary not 

 quite reaching middle of pupil. Nares as near the premaxillary border as to 

 the orbit. Superior angle of interoperculum in contact with operculum ; latter 

 twice or more than twice the width of suboperculum. Maxillo-pretnaxillary 

 ancle open, rounded; maxillary little convex; mandible hardly angulated. 

 Head contained in length to base of caudal a little less than five times ; greatest 

 depth four and two-thirds in the same. Teeth, including the palatine, well 

 developed ; those on the vomer few, in one or two transverse rows. Dorsal, 

 origin opposite median point betweeu ventrals and operculum ; length of base 

 equal to from first ray to upper border of preoperculum, or a few lines nearer 

 the orbit; penultimate rays longest, about equal length of head, not quite at- 

 taining the base of the anal ; R. 21, the first nine undivided. P. 16, extending 

 bevond origin of dorsal ; V. 10, under the eighteenth dorsal ray ; A. 13 ; C. 19. 

 Scales extending between longer rays to opposite the edge of the not very deep, 

 rounded emargination. Sc. j 95 8, exposed portion little higher than wide. 

 Br. 8. Pyloric coeca twenty-two, (in one specimen), twelve round the pylorus, 

 and ten in two longitudinal parallel rows immediately beyond. 



Below silvery, above pale brown, every where with blue reflections. Small 

 deep blue spots scattered on the sides, more abundantly anteriorly. Dorsal 

 fin with numerous blue spots, and two and three rows of narrow pinkish purple 

 spots above them ; superior border pink-purple. 



Length to hasp of caudal 8 in. 9 lin. ; to vent 6 in. 5 lin. Length of limb of 

 caudal 1 in. 4 lin. ; base of anal 10i lin. 



The stomach was filled with neuropterus larvae and small twigs of Thuja. 



This genus, first brought to light in the United States by Prof. Miles, is rep- 

 resented in the more northern parts of the Continent by a fine species the T. 

 s j gnifer and in Europe by the widely distributed T. vex il lifer. The 

 present species is intermediate between the two in some respects. The muzzle 

 is shorter, the mouth less angulited, and the eye smaller than in its European 

 convener: the scales are more numerous, and the median froctal ridge is pecu- 

 liar the coloration is different. The head is longer than in the s i g n i f e r of 

 Richardson, and the anterior part of the body more produced ; the eye is con- 

 siderably smaller. Dr. Richardson mentions another high northern species, 

 under the name of Th. t h y m a 1 1 o i d e s, but little of its distinctive character 

 can be ascertained from his description. 



Coreconus sp., from Saginaw Bay, indeterminable. 



[May, 



