G. ACETABULARIA. 109 



The Neomeris do not branch ; their form resembles 

 a spindle, and they are about two or three deci- 

 metres long. 



Their colour is whitish. 



They are found in thick tufts mixed with the stems of 

 the Acetabularia Crenulata, and other Polypidoms. 



BUSHY. 



1. Neomeris dumetosa. This is the only species 

 belonging to the genus ; it is found in the Antilles. 



—Plate 7. fig. 8. a. B. 



ACETABULARIA. 



Umbel-shaped Polypidom; stem branchless, 

 slender, fistular, and terminated by a striated and 

 radiated umbel, either flat or inclining to a funnel- 

 shape. 



The Acetabularias partake of the characters of the 

 Tubularias, as well as Sertularias, by the situation 

 of their Polypi, each placed in a distinct tube, and 

 participating a common existence by means of the 

 stem to which the lower part of each animalcule is 

 attached ; these tubes, which are very visible and 

 projecting in the lower part of the umbel, blend and 

 disappear when they reach the stem ; they form dis- 

 tinct lines, on the upper part of the disk. 



