HISTORY OF THE FISHES OF MASSACHUSETTS. 291 



commences at the posterior superior angle of the operculum, and, curving downwards 

 and backwards a few scales, pursues a straight course to the tail. 

 y'^The dorsal fin is subquadrangular ; it arises at the middle of the body, not 

 including the caudal fin. The first rays are simple. 



The pectorals are just back of the inferior posterior angle of the operculum ; their 

 .height is less than the length of the head. 



The ventrals are situated beneath the middle of the dorsal fin ; they are as high as 

 the pectorals. 



The anal fin is equal in height to the pectorals; it is rounded when expanded. 

 The first two rays are simple; the others are branched; the posterior rays are the 

 shortest. 



The caudal fin is deeply lunated ; the rays are articulated. 

 The fin rays are as follows: D. 14-16. P. 18. V. 10. A. 9. C. 18. 

 Length, fifteen inches. 



Remarks. During the spring and autumn this species is frequently met with in 

 Boston market, and in a mild winter they may be found there at almost any time. 

 They are most commonly brought here from Charles River, Watertown ; and sometimes 

 attain the weight of five pounds. They are of but little value. Occasionally they are 

 brought into the city by the cart-load, and sold as the Mullet. 



New Hampshire, PECK. Massachusetts, LESUEUR, STORER. New York, Pennsyl- 

 vania, CUVIER. 



CATOSTOMUS GIBBOSUS, Lesueur. 

 The Chub Sucker. 

 (PLATE XXII. FIG. 4.) 



Catostomus gibbosus, Chub Sucker, LESUEUR, Journ. Acad. Nat. Sc., I. p. 92, fig. 



" " Gibbous Sucker, STORER, Report, p. 88. 



" " Cuv. et VAL., Hist. Nat. Poiss., xvii. p. 443. 



" " STORER, Mem. Amer. Acad., New Series, n. p. 420. 



" " " Synopsis, p. 168. 



Ldbeo gibbosus, Gibbous Chub Sucker, DEKAY, Report, p. 194, pi. 32, fig. 101. 

 Catostomus tuberculatus, LESUEUR, Journ. Acad. Nat. Sc., i. p. 92, fig. 



" " STORER, Report, p. 85. 



" Horned Sucker, DEKAT, Report, p. 199, pi. 31, fig. 97. 



" " Cuv. et VAL., Hist. Nat. Poiss., xvn. p. 444. 



Color. The back and upper portion of the sides of this species, when first caught, 



