1715] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 421 
RADIATA. 
ECHINODERMATA. 
HOLOTHURIOIDEA. 
THYONE BRIAREUS Selenka. (p. 362.) 
Zeitschrift fiir Wissenschaftliche Zoologie, vol. xvii, p. 353, 1867. Holothuria 
Briareus Lesueur, Journ. Acad. Nat. Sciences, Philadelphia, ser. i, vol. iv, p. 161, 
1824. Sclerodactyla Briareus Ayres, Proc. Boston Soc. Nat. Hist., vol. iv, pp. 6, 
7, 101-8, 1851; Verrill, Proc. Boston Soc. Nat. Hist., vol. x, p. 342, 1866. Ana- 
perus Bryareus Pourtales, Proceedings American Assoc. for Adv. of Science, for 
1851, p.10, 1852. Anaperus Carolinus Troschel, Miiller’s Arch. fiir Anat., 1846, p. 
62; Pourtales, op. cit., p. 10. : 
Texas to Cape Cod. Long Island Sound, at West Haven, Connecti- 
cut, Thimble Islands, etc., not common ; Vineyard Sound and Buzzard’s 
Bay, 1 to 10 fathoms, not uncommon; Gardiner’s Bay, Long Island; 
Great Egg Harbor, New Jersey; Fort Macon, North Carolina, common 
(coll. Dr. Yarrow); West Florida (coll. E. Jewett). 
STEREODERMA UNISEMITA Ayres. (p. 503.) 
Proc. Boston Soc. Nat. Hist., vol. iv, p. 46, 1851; Selenka, op. cit., p. 344, Plate 
19, figs. 96,97. Anaperus unisemita Stimpson, Proc. Boston Soc. Nat. Hist., vol. 
iv, p. 8, 1851; Verrill, op. cit., vol. x, p. 357, 1866. Cucumaria fusiformis Desor, 
Proc. Boston Soc. Nat. Hist., vol. iii, p. 67 (non Forbes). 
Off Martha’s Vineyard, 22 fathoms, sand; Banks of Newfoundland 
(Stimpson). South Shoals of Nantucket, 22 fathoms, (Desor). 
PENTAMERA PULCHERRIMA Ayres. (p. 420.) 
Proc. Boston Soc. Nat. Hist., vol. iv, p. 207, 1852; Selenka, op. cit., p. 346. 
South Carolina to Vineyard Sound. Off Holmes’s Hole, 4 to 5 fathoms; 
Nobsca Beach, after storms, abundant; Fort Macon, North Carolina 
(coll. Dr. Yarrow). Fort Johnson, South Carolina (Stimpson). 
? MOLPADIA OOLITICA Selenka. (p. 510.) 
Op. cit., p. 257 (in part), 1867. Chirodota odlitica Pourtales, Proc. Amer. Assoc. 
for 1851, p. 13, 1852. Embolus pauper Selenka, op. cit., p. 359, Plate 20, fig. 132 
1867. 
Off Block Island, 29 fathoms, sandy mud; off Boon Island, 95 fathoms, 
muddy, (A. 8. Packard). Massachusetts Bay, in fish stomachs, (Pour- 
tales). Selenka gives “ Cape Palmas (?)” as the locality for his ‘ Hm- 
bolus pauper,” which was based on specimens sent from the Museum of 
Comparative Zojlogy—perhaps the original ones described by Pour- 
tales ; the locality given is evidently erroneous. 
The single specimen from off Block Island is small and imperfect, and 
may not be this species. 
CAUDINA ARENATA Stimpson. (p. 362.) 
Marine Invert. of Grand Manan, p. 17, 1853; Selenka, op. cit., p. 358, Plate 20, 
figs. 129-131 ; Clark, Mind in Nature, p. 187, figs. 114-116; A, and E. C. Agassiz. 
