[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 ram ; diameter, about 0.9 lim . 



Wood s Hole and Vineyard Sound, at surface, July 1 ; off Gay Head, 

 among Salpw, 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&quot;&quot; n to 30 :nm . I have not seen it living. 



GEPHYREA or SirUNCULOIDS. 



PHASCOLOSOMA CLEMENT AEIUM. Verrill Plate XVIII, fig. 92. (p. 416.) 



Sipunculus cwmentarius Quatrefages, op. cit., vol. ii, p. 628, 1865. Phascolosoma 

 Bernhardns Pourtales, Proceedings American Association for Adva iiceinent of 

 Science for 1851, p. 41, 1852. iSipunculus Bernhardus Stimpson, Invertebrata of 

 Grand Manan, p. 28 (non Forbes.) 



Beeper parts of Vineyard Sound, 10 to 15 fathoms ; off Block Island, 

 29 fathoms; Bay of Fuudy, 2 to 90 fathoms, abundant; near Saint 

 George s Bank, 45 to 430 fathoms. 



PHASCOLOSOMA, species undetermined, (p. 353.) 



A species similar to the last in size and form, with a thick integu 

 ment, thickly covered throughout with small rounded papillas or granules, 

 but without the dark cliitinous hooks seen on the posterior part of the 

 latter. 



Vineyard Sound. 



/ PHASCOLOSOMA GOULDII Diesing. Plate XVIII, fig. 93. (p. 353.) 



Revision der Rhyngodeen, op. cit., p. 764, 1859. Sipunculus Gouldii Pourtales, 

 Proceedings of American Association for the Advancement of Science for 

 1851, vol. v, p. 40, 1852 ; Kefersteih, Zeitschrift fur 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. 



TUKBELLAPJA. 



RHABDOCCELA or NEMERTEANS. 



^ BALANOGLOSSUS AUKANTIACUS Verrill. (p. 351.) 



Stimpsonia aurantiaca Girard, Proceedings Academy of Natural Sciences ot Phila 

 delphia, vol. vi, p. 367, 1854. Balanoglossus KowalevsTcii 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 



