124 New York State Museum 



upon. Yellow and green sponges spread over small sur- 

 faces in little cones. The Urn Sponge (Grantia ciliata) 

 forms clusters of little urn-shaped bodies, one-half inch 

 high, dull yellow, gray or drab in color. This sponge 

 extends from Rhode Island northward to Greenland. 

 Many of the hydroids are littoral and to be found in tide 

 pools, among them the sertularians mentioned above, the 

 Eel-Grass Hydroid {Pennaria tiarella) and the Passion 

 Flower Hydroid (Thamnocnidia spectabilis). The Eel- 

 Grass Hydroids are three to six inches high and resemble 

 little dark-colored trees. This is a branching form found 

 in tide pools, on Rockweed, piles etc. in spring and early 

 summer. The Passion Flower Hydroid is found within 

 shaded tide pools and often grows upon sunken ropes. 

 It forms dense clusters of delicate amber-gray stems. 

 Each stem ends in a pink-colored polyp which has two 

 rows of tentacles surrounding the mouth. Among the 

 bryozoans of the tide pools is to be found the Red Crust 

 {Eschar ella variabilis) which is especially abundant in 

 shaded tide pools from South Carolina to Massachusetts 

 bay. It forms a dull red or purplish incrustation over 

 rocks and dead shells, layer after layer, and bears a super- 

 ficial resemblance to coral. It grows from tide level to 

 a depth of 150 feet. The calcareous Crisia growing on 

 seaweed is also present and another form (Tubulipora) 

 that grows on seaweeds in corallike, fan-shaped masses 

 sometimes one-quarter of an inch in diameter. 



There are several species of sea anemones present in 

 these pools and they may be quite abundant. The 

 Orange-streaked Anemone {Sargartia luciae) is now one 

 of the most abundant species in the rocky tide pools of 

 Long Island sound and it extends as far north as Salem, 

 Mass. It was not known in this section before 1892. but 



