INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 425 



Page. 



407 



327 



408 



408 



S. cupressiua 408 



Hydmllniania falcata 408 



O. dichotoma 



O. commissuralis . . . 



Lafoea calcarata 



Sertularia arsrentea. 



Halecium gracile 



Eadeiulrium dispar. . . 



Penuaria tiarella 



Tliam'nocQida teuella. 

 Hydractiuia polycliua 



Page. 

 328 

 408 

 327 

 407 

 328 



Folyps. 



Sagartia modesta 



Metridium mamiuatuin. 



Page. 

 330 

 329 



Edward sia lineata 



Astraugia Dante 



PROTOZOA. 



SiJonges. 



Page. 

 421 

 421 



Page. 



Grantia ciliata 330 



Chalina, sp 409 



C. ociilata 409 



Cliona sulpliurea. 

 Halicliondria, sp. . 

 Tedania, sp 



Formninifera. 



Numerous species 



Page. 

 421 

 330 

 409 



Page. 

 421 



II. 7. — FAUNA OF THE SANDY BOTTOMS OF THE BAYS AND SOUNDS. 



The sandy bottoms in Vineyard Sound are chiefly found in shallow 

 water, either along the shores or on the banks and shoals. In Buzzard's 

 Bay they were met with only in few places, near the shore, and have no 

 great extent. To the eastward of Vinej^ard Sound, throughout the 

 greater part of Nautucket Sound, Muskeget Channel, and the waters 

 south and southeast of Nantucket and Cape Cod, the bottom is geuer- 

 all}' sandy, sometimes passing into gravelly and shelly. 



The true sandy bottoms are not favorable to nmny kinds of animals, 

 and where the sands are constantly changing, as on most of the shoals 

 in this region, the bottom is sometimes almost barren of life, though 

 certain burrowing species may occur. 



The following are some of the special localities where dredgings were 

 made on sandy bottoms : In Buzzard's Bay, at line 11, fZ, e,/; 64, «, h ; 

 GO, a, h ; 07, a, b ; 08, a, b ; 71, a, b, d ; 73, a, b, c, e, f. In Vineyard 

 Souud, at line 14, g, h; 25, a, b ; 27, a, b ; 30, a, b; 37, Ji, i; 43, a, b ; 

 4G, c, d ; 47, d, e; 48, a, b. A large portion of the species occurring on 

 these bottoms have been mentioned before either as inhabitants of the 

 sandy shores at low water, or as living upon gravelly and shelly bot- 

 tonis. With the exception of a few species living attached to scattered 

 shells or stones, nearly all the species are such as are adapted to bur- 



