PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 131 



Tubulipora serpens (LiuiKi) Flem., Brit. Anim., p. 529, t. Johnston, Hist. Brit. 

 Zooph., 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. 



Flustrella hispida (Fabr.) Gray. — Alcyonidium hisjndum Smitt. Ver., Inv. V. S., 



p. 708, 1874. 



Incrusting floating fucus in the harbor, and probablj' also occurring 

 on the sea-weeds of the piles. 



Vesicularia, sp. 



One or two small specimens of a Vesicularia with creeping stem, pos- 

 sibly V. tiva Smitt, were found upon fucus growing upon the piles. 



Bugula turrita (Desor) Ver., Inv. V. S., p. 712, pi. sxsiv, figs. 258, 259, 1874. 



Very abundant on piles of wharves, eel-grass in shallow water, and 

 on floating fucus; associated with Grisia eburnea. 



Electra pilosa (Liun6) Fisch., t. Ver., Preliminary Check List Mar. Inv. Atl. Coast, 

 p. 29, 1879. — Memhranipora 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. — Escharipora 

 punctata Smitt, Ofvers; af K. Vetens.-Akad. Forh., 18(58, appendix, p. 4. 

 Ver., Inv. V. S., p. 713, 1874. 



On eel-grass, one-half fathom, rare. 



Hippothoa hyalina (Linn6) Smitt, Floridan Bryozoa, part II, p. 40, 1873. — MolUa 

 hijalina Smitt, Ofvers. af K. Vetens.-Akad. Forh., 1868, appendix, p. 16. 

 Ver. , Inv. V. S. , p. 713. 1874. 



On floating fucus and eel-grass in the harbor, and on the beaches. 



Lepralia americana Ver., Am. Journ. Sci., Ill, vol. ix, p. 415, pi. vii, figs. 4, 5, 

 1875. — Lepralia Pallasiana Ver. Inv. V. S., p. 713, 1874 (with query; non 

 Busk). 



Very common 5 incrusting fucus and other sea-weeds on the piles, and 

 also growing on eel-grass in shallow water. 



ECHINODEEMATA. 



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 Eace 

 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 



