69. AMMODYTID.E ARGVROT^NIA. 415 



Head 42; depth about 10. D. GO; A. 28. Newfoundland to Cape Hat- 



teras, abundant. Scarcely dilTerent from A. tohianus of Europe. 



(DcKuy, Now York F;iuua, Fish. 184'i, 317; Giiuther, iv, 366; Storer, Hist. Fish. 

 Mass. ) 



653. A. porsonatMS Grd. — Sand Laxnce. 



Clear hyaline green ; sides silvery. Pectoral fin half lengtli of head, 

 reaching past the front of the dorsal. Lateral folds 130-150. Head 4A ; 

 depth 0. Eye 2 in snout, (! in head. D. 54; A. 24. ^ L. G iuchcs. 

 Monterej' to Alaska, very abundant; probably also a variety of A. 

 tohianus. 



(Giijinl, Proc. Ac. Xat. Sci. Phila. 1856, 137; Guutber, iv, 387.) 



651. A. alascantis Cope. 



Dorsal inserted above middle of pectoral. Maxillary reaching front 

 of orbit. Mandible less than depth of body. Head 4i ; depth 9. Eye 

 2 in snout, G in head. Lateral folds 182. D. G2; A. 31. L. 6 inches. 

 Sitka, Alaska. (Cope.) 



(Cope, Proc. Am. Phil. Soc. 1873. Probably also a form of J. tohtanun.) 



655. A. <lu9)aiis Keinh. 



Skin with about 150 very distinct folds. Dorsal fin inserted over 

 posterior tbird of pectoral. Head G; depth equalling length of inaudi- 

 ble, 2^ in length of head. D. G5; A. 34. Cape Cod to Greenland. 

 ( Gilnther. ) 



(Reiuhaidt, Dausk. Vidousk. Selsk. Afhandl. 1838, 132; GUnther, iv, 387.) . 



205.— ARGYROT^WIA Gill. 



(Gill, Cat. Fish. East Coast N. Amer. 1861, 40 (not eharacterized) : type Ammodi/tes 

 vittatus Dclvay.) 



This genus is supposed to differ from Amniorlytes in the presence of a 



rudimentary spinous dorsal, composed of about 7 minute free spines. 



{upyoprx;, silvcr; zaivta^ ribbou.) 



656. A. viltata (DoKay) Gill. 



Greenish olive above, with a broad silvery band along the sides, which 

 is margined above with blackish ; silvery below. Body oblong, some- 

 what compressed, slender. Head small and pointed, flattened and 

 grooved above, compressed beneath. Eyes large. Snout terminating 

 in a bifid tip. Mouth rather large, protractile, toothless. Lower jaw 

 longest. D. VJI, 54; A. 28. Sag Harbor, New York. (DeKay.) It 

 has not been seen since its description by DeKay, and its existence 

 is extremely doubtful. 



{Jmmodi/tes vittatus DcKay, New York Fauna, Fish. 184'2, 3*8.) 



