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along which run lines of cilia, by which the animals move 

 slowly in the water. On the sides of the intestine is 

 developed a system of water tubes that extends through 

 the whole body and opens by a pore on the back. The 

 first appearance of the star-form are five buds on each of 

 the large water tubes running parallel with the intestine. 

 Around these buds grow the five arms of which the star- 

 fish is made up. At first they are in a line along the in- 

 testine, afterwards the line bends around and the ends 

 unite, so that the arms arrange themselves in a star. 

 Before this takes place the whole of the old larva is 

 absorbed into the new starfish. The pore on the back of 

 the larva becomes the bright colored porous spot on the 

 starfish, and the water system connected with it spreads 

 through the whole body, carrying water to the suckers by 

 which the starfish crawls. 



Mr. J. S. iCiNGSLEY spoke of the anatomy and devel- 

 opment of the tunicates, and described their tadpole-like 

 larvae, which have a dorsal cord similar to that of verte- 

 brates, on account of which they are supposed by many 

 naturalists to be related to the latter animals. 



A vote of thanks was passed to Henry W. Peabody, 

 Mr. and Mrs. Wm. F. Ashton, Mrs. Walworth, Mrs. J. 

 H. Webb, Mrs. Hitchings and other residents in Salem 

 for numerous civilities. 



The members then adjourned to the Marine Laboratory 

 and spent a short time in the examination of the speci- 

 mens in its museum. 



