PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 131 
Tubulipora serpens (Linné) Flem., Brit. Anim., p. 529, t. Johnston, Hist. Brit. 
Zoodph., p. 275, 1847.—T. flabellaris Ver., Inv. V.S., p. 708, 1874. 
Found very abundantly on the eel-grass in shallow water, forming 
small rounded clusters. 
FPlustrella hispida (Fabr.) Gray.—Alcyonidium hispidum Smitt. Ver., Inv. V. &., 
p. 708, 1874. 
Incrusting floating fucus in the harbor, and probably also occurring 
on the sea-weeds of the piles. 
Vesicularia, sp. 
One or two small specimens of a Vesicularia with erceping stem, pos- 
sibly V. wa Smitt, were found upon fucus growing upon the piles. 
Bugula turrita (Desor) Ver., Inv. V.S., p. 712, pl. xxxiv, figs. 258, 259, 1874. 
Very abundant on piles of wharves, eel-grass in shallow water, and 
on floating fucus; associated with Crisia eburnea. 
Electra pilosa (Linné) Fisch., t. Ver., Preliminary Check List Mar. Inv. Atl. Coast, 
p. 29, 1879.—Membranipora pilosa Farre, Phil. Trans., p. 412, 1837. Ver., Inv. 
V.S., p. 712, 1874. 
Incrusting fucus, laminaria, eel-grass, &c , floating in the harbor, and 
stranded on the beaches. 
Cribrellina puncturata Smitt, Floridan Bryozoa, part II, p. 24, 1873.—2scharipora 
punctata Smitt, Ofvers. af K. Vetens.-Akad. Férh., 1868, appendix, p. 4. 
Ver., Inv. V.S., p. 713, 1874. 
On eel-grass, one-half fathom, rare. 
Hippothoa hyalina (Linné) Smitt, Floridan Bryozoa, part II, p. 40, 1873.—Mollia 
hyalina Smitt, Ofvers. af K. Vetens.-Akad. Férh., 1868, appendix, p. 16. 
Ver., Inv. V.5S., p. 713. 1874. 
On floating fucus and eel-grass in the harbor, and on the beaches. 
Lepralia americana Ver., Am. Journ. Sci., III, vol. ix, p. 415, pl. vii, figs. 4, 5, 
1875.—Lepralia Pallasiana Ver. Iny. V. 8., p. 713, 1874 (with query; non 
Busk). 
Very common; incrusting fucus and other sea-weeds on the piles, and, 
also growing on eel-grass in shallow water. 
ECHINODERMATA. 
Leptosynapta Girardii (Pourtales) Ver., Inv. V.S., p. 716, 1874. 
This species is common everywhere about Provincetown, on the sandy 
beaches between low-tide and half-tide levels, but it is most abun- 
dant on the sandy flats about midway between the town and Wood End 
Light House, where large areas are left dry for a considerable time at 
low water. It also occurs in abundance on the sand-flats inside of Race 
Point Light House, on the outer shore. 
Leptosynapta roseola Ver., Inv. V.S., p. 716, 1874. 
Provincetown beach, and sheltered inlets back of Race Point, on the 
outer side of Cape Cod, buried in the sand at low water, and associated 
