Handbook of Paleontology 137 



(Sertularia pumila, S. argentea) are everywhere along 

 the coast. S. pumila, the most abundant of all the 

 hydroids of the New England coast occurs in pro- 

 fusion on the rocks and on Rockweed and other 

 seaweeds. The creeping stem gives rise to upright 

 branches one or one and a half inches in height and 

 more or less branched, with horny cups close against 

 the stem (sessile). S. argentea is a beautiful species 

 with a profusion of silvery branches on a dark stem. 

 The colonies are often a foot or more long. This form 

 is common from New Jersey northward. The Sea 

 Cypress (S. cupressina) has the same range and is 

 similar to the above, but the main stem is thicker and 

 longer and the branches less crowded and subdivided. 

 Both the Brown Sea Anemone and the Crimson and 

 Rose Anemone occur here, as in the rocky pools ; the 

 former in sheltered crevices and under large stones ; 

 the latter on ledges covered with Rockweed and in 

 shallow water. There is an interesting form of sea 

 anemone which lives in shallow water in the West 

 Indies and the Bermudas, under rocks or in crevices. 

 It resembles a pancake, and hence goes under the name 

 of Cake Anemone. Only one stony coral extends as 

 far into the temperate zone as our coasts. This is the 

 little Star Coral (Astrangia danae) which is found 

 from the Carolinas to Cape Cod. It lives in clefts of 

 rocks in small patches, sometimes two or three inches 

 across, which look like a thin crust of lime with star- 

 like divisions and sometimes branch. The individual 

 is one-quarter of an inch or more across. The living 

 animals are white so that when they are expanded the 

 patch of coral resembles a cluster of small sea anemo- 

 nes. In Long Island sound this coral is abundant in- 



