374 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [663] 
ELYSIELLA CATULUS Verrill. Plate X XV, fig. 171. (p. 480.) 
American Journ. Science, vol. iii, p. 284, Plate 7, figs. 5, 5%, 1872. Placobranchus 
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. 
CLIONE PAPILLONACEA Pallas. (p. 444.) 
Spicil. Zo6l., x, p. 37, Plate 1, figs. 18, 19, (?) 1774. Clio limacina Phipps, Voyage 
to North Pole, p. 195, 1774 (t. Gould). Clio retusa Miiller, Prod. Zo6). Dan., 2742, 
1776 (non Linné); Fabricius, Fauna Gronlandica, p. 334, 1780 (description ex- 
cellent). Clio borealis Brugiere, Encye. Meth., Vers., i, p. 502, 1792 (t. Gould). 
Clione borealis 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 limacina 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. V. and D- 
C. Eaton); Vineyard Sound (V. N. Edwards); Portland, Maine (C. B. 
Fuller). 
The synonymy of this species has been greatly and unnecessarily con- 
fused. The Clio retusa of Linné was a southern Pteropod, having a tri- 
quetral shell. In a foot-note on page 1094 of the twelfth edition of the 
Systema Nature, 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. 
SYYLIOLA VITREA Verrill. Plate XXV, fig. 178. (p. 443.) 
American Journ. Science, vol. iii, p. 284, 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™™; diameter, 2"™. 
Taken among Salpe, off Gay Head, Martha’s Vineyard, 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 1872, 
on the United States steamer Bache. These may occasionally occur 
also in the vicinity of Nantucket and Martha’s Vineyard. 
