[627] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 333 
naked space less than their own length; the distance from the anterior 
end of the middle fins to the anterior border of the head is equal to 
twice the length of the fins; the length of the latter is about one-sixth 
of the entire length of the body. The color is translucent whitish, 
nearly diaphanous. 
Length, about 16°"; diameter, about 0.9"". 
Wood’s Hole and Vineyard Sound, at surface, July 1; off Gay Head, 
among Salpe, September 8, in the day-time. 
SAGITTA, species undetermined. (p. 440.) 
A much larger and stouter species than the preceding was taken in 
abundance by Mr. Vinal N. Edwards, in Vineyard Sound, at various 
dates, from January to May. 
Its length is generally 25"" to 30". I have not seen it living. 
GEPHYREA or SIPUNCULOIDS. 
PHASCOLOSOMA C4IMENTARIUM. Verrill Plate X VIII, fig. 92. (p. 416.) 
Sipunculus cementarius Quatrefages, op. cit., vol. ii, p. 628, 1865. Phascolosoma 
Bernhardus Pourtales, Proceedings American Association for Advancement of 
Science for 1851, p. 41, 1852. Sipunculus Bernhardus Stimpson, Invertebrata of 
Grand Manan, p. 28 (non Forbes.) 
Deeper parts of Vineyard Sound, 10 to 15 fathoms; off Block Island, 
29 fathoms; Bay of Fundy, 2 to 90 fathoms, abundant; near Saint 
George’s Bank, 45 to 430 fathoms. 
PHASCOLOSOMA, species undetermined. (p. 393.) 
A species similar to the last in size and form, with a thick integu- 
ment, thickly covered throughout with small rounded papille or granules, 
but without the dark chitinous hooks seen on the posterior part of the 
latter. 
Vineyard Sound. 
PHASCOLOSOMA GOULDU Diesing. Plate XVIII, fig. 93. (p. 353.) 
Revision der Rhyngodeen, op. cit., p. 764, 1859. Sipuncuius Gouldit Pourtales, 
Proceedings of American Association for the Advancement of Science for 
1851, vol. v, p. 40, 1852; Keferstein, Zeitschrift fiir wissenschaftliche Zoologie, 
vol. xv, p. 434, Plate 33, fig. 32, 1865, and vol. xvii, p. 54, 1867. 
New Haven to Massachusetts Bay, at Chelsea Beach; common in 
sand and gravel at low-water mark. 
SCOLECIDA. 
TURBELLARIA. 
RHABDOCGLA or NEMERTEANS. 
BALANOGLOSSUS AURANTIACUS Verrill. (p. 351.) 
Stimpsonia aurantiaca Girard, Proceedings Academy of Natural Sciences of Phila- 
delphia, vol. vi, p. 367, 1854. Balanoglossus Kowalevskii A. Agassiz, Memoirs 
American Academy of Arts and Sciences, vol. ix, p. 421, Plates 1-3, 1873. 
Fort Macon, North Carolina, to Naushon Island. Charleston, South 
