52 ANIMALS OF THE SEASHORE 



internodes each of which bears hydrotheeae. Hydro- 

 theeae sub-alternate, not opposite as in Seriularia, 

 and curve outward so that the terminals are one- 

 third free; aperture with two opposite teeth, one 

 much longer than the other. 



Reproductive polyps (gonosomes) are urn- 

 shaped with two lateral projections; medusae are 

 not liberated. 



Fairly common in water from 1 to 100 fathoms 

 from Chesapeake Bay northward; probably extends 

 farther south. Frequently large masses of dead 

 stalks are washed on the beaches. The species 

 appears to be particularly abundant in the Dela- 

 ware and Chesapeake Bays. 



Some years ago, when marine material was used 

 extensively for trimming women's hats, this species 

 was used more than any other. 



Thuiaria cupressina Linne (Sea Cypress) 



PLATE II. Fig. 13 



Somewhat similar to the above, but usually 

 longer and less branched; internodes shorter than 

 argenteci; hydrotheeae not quite opposite and almost 

 entirely in contact with the main stem instead of 

 being partially free as in curgentea. 



Gonosomes similar to those of the above; borne 

 in rows; usually reddish in color and appearing in 

 April (New Jersey). 



Found in similar situations as the above but not 

 as common ; known from New Jersev northward. 



