appears to be its northern limit. Captain Atwood found it abundant 

 at Provincetown, in 1856. 



Family PLEURONECTID^. 



18. Pleuronectes glaber (Storer) Gill. Smooth Flounder, 

 Fool-fish, Christmas Fish. Platessa glabra Storer, Hist. Fish. 

 Mass., 1867, p. 199, pi. xxxi, fig. 1. Euchalarodus Putnami Gill, Proc. 

 Acad. Nat. Sci., Phila., 1864; Putnam, in Storer's Hist. Fish. Mass., 

 1867, p. 279. Specimens from Salem Harbor, Nov. 15, 1872, are in the 

 Museum of the Peabody Acad, of Science, as well as several others 

 collected by Mr. Walker, bet^vveen 1868 and 1874. The Fish Commis- 

 sion obtained young specimens of about two and a half inches, at 

 Beverly bridge, in August, 1877. Others in the collection of the 

 Essex Institute were taken in Salem Harbor, Nov. 15, 1872, measuring 

 from three to four inches. The species appears in Salem Harbor in 

 abundance in late December and early January, coming u.p into 

 shallow water to spawn. Dr. Bean has demonstrated the fact, that 

 Euchalarodus Putnami Gill, is the male of this species. In every par- 

 ticular except in dentition this species exactly corresponds with Pleu- 

 ronecter passer and P. flesus of Europe. 



19. Pseudopleiironectes americanus (Walb.) Gill. thxT- 

 nsH. Platessa plana Storer, Hist. Fish. Mass., 1867, p. 195, pi. xxx, 

 fig. 2. A very common resident species, occurring in winter and 

 summer on muddy bottoms in shoal water. 



20. Limanda ferruginea (^Storer) Goode & Bean. Rusty Floun- 

 der. Platessa ferruginea Storer, Hist. Fish. Mass., 1867, p. 198, pi. 

 xxx, fig. 4. Platessa rostrata H. R. Storer, Boston Journ. Nat. Hist. 

 V, 1, 1857, p. 268, pi. viii, fig. 2. A common resident species inhab- 

 iting the deep waters of the bay in summer, and approaching the 

 shores in winter. H. R. Storer's species from Labrador is not 

 distinct from this. 



21. Glyptocephalus cynoglossus (Linn.) Gill. Craig Floun- 

 der. Glyptocephalus cynoglossus Gill, Proc. Acad. Nat. Sci., Phil., 

 1873, p. 361. Glyptocephalus acadianus Gill, 1. c. A common resident 

 species inhabiting the deepest part of the bay, but never discovered 

 until 1877, when the U. S. Fish Commission found them in great 

 abundance ofi' Salem. 



22. Lophopsetta maculata (Mitch.) Gill. Spotted Sand 

 Flounder. Pleuronectes maculatus Storer, Hist. Fish. Mass., 1867, 

 p. 204, pi. xxxi, fig. 4. The Essex Institute museum has a specimen 

 from Salem Harbor, by S. L. Walker, in July, 1870, and several spec- 

 imens were obtained by the U. S. Fish Commission in 1878, in Glouces- 

 ter Harbor, and at Milk Island. Storer knew it only from Province- 



