69. AMMODYTID/E ARGVROT.ENIA. 415 
ITeacl 43; depth about 10. D. GO; A. 28. Xewfouudlaud to Cape Hat- 
teras, abuudaut. Scarcely different from A. tobianus of Europe. 
(DeKay, New York Fauua, Fish. 1S4‘2, 317; Giiuther, iv, 366; Storer, Hist. Fisk. 
Mass.) 
653. A. personatias Grd . — Sand Launce. 
Clear hyaline green ; sides silveiy. Pectoral fin half length of head, 
reaching past the front of the dorsal. Lateral folds 130-150. Head 44; 
depth 9. Eye 2 in snout, 0 in head. D. 54; A. 24. L. G inches. 
Monterey to Alaska, very abundant; probably also a variety of A. 
tobianus. 
(Girard, Proc. Ac. Nat. Sci. Pkila. 1856, 137 ; Giiutker, iv, 387.) 
654. A. aSascaiius Coi)e. 
Dorsal inserted above middle of pectoral. Maxillary reaching front 
of orbit. Mandible less than depth of body. Head 4J; depth 9. Eye 
2 in snout, G in head. Lateral folds 182. D. G2; A. 31. L. G inches. 
Sitka, Alaska. [Cope.) 
(Coiie, Proc. Am. Phil. Soc. 1873. Probably also a form of A. tobianus.) 
655. A. datiius Reiuh. 
Skin with about 150 very distinct folds. Dorsal fin inserted over 
posterior third of pectoral. Head G ; depth equalling length of mandi- 
ble, 2^ in length of head. D. 65; A. 34. Caiie Cod to Greenland. 
[Gunther.) 
(Reiuhardt, Dausk. Vidensk. Selsk. Afhaudl. 1838, 13‘2; Giiuther, iv, 387.) 
205.— ARGYR<>T.i:i^IA Gill. 
(Gill, Cat. Fish. East Coast N. Amer. 1861, 40 (not characterized): type Ammodyies 
vittatiis DeKay.) 
This genus is supposed to differ from Ammodyies in the presence of a 
rudimentaiy spiiious dorsal, composed of about 7 minute free spines. 
[afjyupoq^ silver; ratvla^ ribbon.) 
656. A. viffata (DeKay) Gill. 
Greenish olive above, with a broad silverj’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, comiiressed beneath. Eyes large. Snout terminating 
in a bifid tip. Mouth rather large, protractile, toothless. Lower jaw 
longest. D. VII, 54; A. 28. Sag Harbor, l!7ew York. {DeKay.) It 
has not been seen since its description by DeKay, and its existence 
is extremely doubtful. 
{Ammodyies vittatus DeKay, New York Fauna, Fish. 1842, 358.) 
