f)94 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



to VeraCrnz. New Haven, common on oysters, living, but perhaps intro- 

 duced from Virginia. New York Harbor, on oysters, (S. Smitli). Fort 

 Macon, North Carolina (Yarrow). Georgia (Couper). Tampa Bay, Flor- 

 ida (Conrad, Jewett). Texas (Kcemer). Near Vera Cruz (coll. T. Salt, in 

 Y^ale museum). 



MODIOLARIA NianA Loven. Plate XXXI, fig. 236. (p. 433.) 



Ofvei's. af Kongl. Vet.-Akad., Forhandl., vol. iii, p. 187, 1846 ; Morcb, Naturhist. 

 Bidrag, Gronland, p. 93, 1857; H. and A.Adams, Genera, vol. ii, p. 515, 1858 ; 

 Gould, Invert., ed. ii, p. 190, figs. 487, 488. Modiola nigra Gray, Appendix to 

 Parr;y-'s Voyage, p. 244, 1824 ; Hanley, Recent Shells, p. 242. Mi/film discrepans 

 Stimpsou, Shells of New England, p. 12, 1851 (not of European authors). 

 Modiola nexa Gould, Invert., ed. i, p. 128, fig. 86 (young). 



Circumpolar : Greenland, southward to Long Island ; Spitzbergen, 

 southward to Great Britain and Holland; Behring's Straits, southward 

 to Okhotsk. Not uncommon and of good size in Vineyard Sound, 10 

 to 15 fathoms, off" Gay Head, etc. ; common in Casco Bay and Bay of 

 Fundy, of large size, low-water to GO fathoms ; Stonington, Connecticut, 

 in stomach of cod, (Linsley). 



Fossil in the Post-PIioceue of Maine, Canada, Labrador, and Northern 

 Europe. 

 MoDiOLARiA DiscoES Beck. 



Lov6n, Ofvers. af Kongl. Vet.-Akad. Forhandl., vol. iii, p. 187, 1846 ; Gould, Invert., 

 ed. ii, p. 83, figs. 489, 490. Mytihts discors 1^111116, Syst. Nat., ed. xii,p. 1159; 

 Stinipson, Shells of New England, p. 12, (mom Gould, ed.i). Mytilus discrepans 

 Montagu, Test. Brit., p. 169. Modiola discrepans 'LiUvaAxck, P^r\\va. sans Vert., ed. 

 ii, vol. vii,p. 23; Gould, Invert., ed. i, p. 129, fig. 83. Modiola Iwvigata Gray, 

 Appendix to Parry's Second Voyage, j). 245. Mytilus levigafus Stimpson, Shells 

 of New England, p. 12. Modiolaria Iwvigata Lov6n, op. cit., p. 187, 1846 ; Stimp- 

 sou, Check-List, p. 2, 1860 ; this Report, p. 509. 



Circumpolar: Greenland, southward to Long Island; Finmark, 

 southward to Great Britain; Beliring's Straits, southward to Paget 

 Sound. Yery common in Casco Bay and Bay of Fundy, low-water to 

 100 fathoms; not uncommon in Massachusetts Bay; rare and local 

 south of Cape Cod. Saint George's Bank and vicinity, common, (S. I. 

 Smith, Packard). Gardiner's Baj^, Long Island, rare, (S. Smith). North 

 of Hebrides, in 530 fathoms, (t. Jeffreys). 



Fossil in the Post-Pliocene of Canada, Greenland, and Northern 

 Europe. I am unable to separate M. Iwvigata, as a species, from the 

 ordinary New England form, usually referred to M. discors, the differ- 

 ences being due chiefly to age. Tlie common European form of discors 

 shows more differences, but is probably only a dwarf variety of the 

 same species. 

 MoDiOLAEiA CORRUGATA Morch. Plate XXXI, fig. 235. (p. 509.) 



Op. cit., p. 94, 1857; Stimpson, Check-List, Smithsonian Inst., p. 2, 1860; Gould, 

 Invert., ed. ii, p. 193, fig. 491. 'Mytilus corrugatus Stimpson, Shells of New 

 Eugland, p. 12, 1851. Mytilus discors Gould, Invert., ed. i, p. 130, fig. 84 {non 

 Linue, sp.). 



Long Island to Greenland and Northern Europe. Off" Martha's Vine- 



I 



