INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 627 



naked space less than their own length ; the distance from the anterior 

 end of the middle fius 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, Jnly 1 -, off Gay Head, 

 among Saljxej 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. Yinal 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. 



GEPHTREA or SIPUNCULOIDS. 



Phascolosoma c^3iENTARiLT3r. Vcrrill Plate XVIII, fig. 92. (p. 416.) 



S'qninculus cannentarius Quatrefages, op. cit., vol. ii, p. 628, 1865. Phascolosoma 

 Bernliardas Pourtales, Proceediugs American Association for Adra ncement of 

 Science for 1851, p. 41, 185'2. Sipuncuhis Bernliardus Stimpson, Inrertebrata 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 j near Saint 

 George's Bank, 45 to 430 fathoms. 



PHASC0L0S03IA, specles undetermined, (p. 353.) 



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

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

 but without the dark chitinous 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 Ponrtales, 

 Proceediugs 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. 



TUEBELLAPvIA. 



RHABDOCCELA or NEMERTEANS. 



Balanoglossus alrantiacus Verrill. (p. 351.) 



Stimpsonia aurantiaea Girard, Proceedings Academy of Natural Sciences ot Phila- 

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



