BRITISH ZOOPHYTES 333 



phyllactolsematous^ but Mi\ Hincks does not so class 

 it. The poljpide is of a whitish colour, transparent, 

 somewhat cup-shaped, and borne on a long flexible 

 stem which is usually covered with short spines. 



The tentacles vary in number up to 24. The body 

 of the polypide is separated from the stem by a 

 diaphragm. It frequently falls off, and is renewed by 

 gemmation. 



2. P. NUTANS, Dalyell. 



Hab. : Scotland {Dahjell), Tenby (Levpier) . 



This species is smaller than the preceding, and is 

 always destitute of spines. The stem tapers just below 

 its junction with the polypide. The stolon is distinctly 

 jointed. 



3. P. GRACILIS, Sars. 

 Hab. : "Widely distributed. 



The polypide and stem are much smaller than on 

 P. cernua, from which also this species may be distin- 

 guished by the peduncle, which is '' expanded below 

 into a short, thick cylinder, above which it is extremely 

 slender, widening upwards to the point of junction 

 with the polypide.^' 



FAMILY II. LOXOSOMID^. 



Polypides home on a contractile loeduncle, solitary, 

 ahu ays furnished in tJie young state ivith a pedal gland; 

 gemmcB produced on the body of the polypide. — T. H. 

 Genus Loxosoma, Keferstein. {Xo^6<i, oblique; 

 aoifxa, a body.) 

 Polypides pedunculate, solitary, the body closely 

 united to the stem, and not deciduous ; tentacular 

 crown placed obliquely on the ventral side of the 

 body.— T. H. 



