668 EEPORT OF COMMISSIONER OF FISH ANI*> FISHERIES. 



Elysiella catulus Yerrill. Plate XXY, fig. 171. (p. 480.) 



American Journ. Science, vol. iii, p. 284, Plate 7, figs. 5, 5 a , 1872. Placooranclius 

 catulus Agassiz, MSS. ; Gould, Invert., ed. ii, p. 256, Plate 17, figs. 249, 250, 

 1870. 



Great Egg Harbor, New Jersey, to Massachusetts Bay. New Haven 

 Harbor and Wood's Hole, among eel-grass, common. 



PTEROPODA. 



GYMNOSOMATA. 



Olione papillonacea Pallas, (p. 444.) 



Spicil. Zool., x, p. 37, Plate 1, figs. 18, 19, (?) 1774. Clio Umacina Phipps, Voyage 

 to North Pole, p. 195, 1774 (t. Gould). Clio return Miiller, Prod. Zool. Dan., 2742, 

 1776 (non LinntS) ; Fabricius, Fauua Gronlandica, p. 334, 1780 (description ex- 

 cellent). Clio oorealis Brugiere, Encyc. Meth., Vers., i, p. 502, 1792 (t. Gould). 

 Clione oorealis Gray, Brit. Mus. Pteropoda, p. 36, 1850 ; Stimpson, Shells of New 

 England, p. 27, 1851 ; H. and A. Adams; Genera, vol. i, p. 62, Plate 7, fig. 7. 

 Clione Umacina Stimpson, Smithsonian Check-Lists, p. 4, 1860; Binney in Gould, 

 Invert., ed. ii, p. 507, fig. 754 (poor). Clio Miquelonensis Rang, Ann. Sci. Nat., 

 ser. i, vol. v, p. 285, Plate 7, fig. 2, 1825. 



New York to the Arctic Ocean ; on the northern coasts of Europe 

 south to Great Britain. Off Stonington, Connecticut (A. E. Y. and D. 

 C. Eaton) ; Yineyard Sound (Y. X. Edwards) ; Portland, Maine (O. B. 

 Euller). 



The synonymy of this species has been greatly and unnecessarily con- 

 fused. The Clio retusa of Linue was a southern Pteropod, having a tri- 

 quetral shell. In a foot-note on page 1094 of the twelfth edition of the 

 Systema XaturaB, he states that he had not seen the genus Clio, but 

 adopts it from Brown. He gives three species mentioned by Brown, all 

 having shells. 



THECOSOMATA. 



Sxyliola vitrea Yerrill. Plate XXY, fig. 178. (p. 443.) 

 American Journ. Science, vol. iii, p. 234, Plate 6, fig. 7, 1872. 



Shell smooth, polished, diaphanous, almost glassy, long conical, rather 

 slender, slightly curved toward the acute apex; animal white ; locomo- 

 tive organs obovate, with the end broadly rounded, and bearing 

 slender tapering tentacle-like processes near the middle of the anterior 

 edge; intermediate lobe short, rounded in front. 



Length of shell, 11.5 mm ; diameter, 2 mm . 



Taken among Salpce, off Gay Head, Martha's Yineyard, in the after- 

 noon, September 9, 1871. 



Several other species of this and other related genera were taken by 

 Messrs. S. I. Smith and Oscar Harger, off Saint George's Bank, in 1S72, 

 on the United States steamer Bache. These may occasionally occur 

 also in the vicinity of Xantueket and Martha's Yineyard. 



