572 LOXOSOMIDvE. 



The larva has been described, and its structure demon- 

 strated, by Vogt and Barrois : it is essentially identical 

 with that of the Pedicellinidce, and constitutes a strongly 

 marked type. 



Genus LOXOSOMA, Keferstein. 



Der. From Xo^os, oblique, and aai/xa, body. 



LoxosoMA, Keferstein, 1863. 



Cyclopeljia, Busch, 1851 (founded on the larva). 



Oyclatella, Van Benedeu, 1864 (referred to the Tristomidea). 



Generic Character. — Vol^ypihes pedunculate, solitary, 

 the body closely united to the stem, and not deciduous ; ten- 

 tacular crown placed obliquely, on the ventral side of the 

 body. 



The unsymmetrical conformation of the body in the 

 present genus, which shows itself in the displacement of 

 the tentacular wreath from the summit to one side, also 

 exists, though in a much slighter degree, in Pedicellina, 

 as Vogt has remarked. There are considerable differences 

 in the extent to which this displacement is carried 

 amongst the species of Loxosoma. 



The absence of the diaphragm in Loxosoma, which in 

 Pedicellina divides the body from the stem, and which in- 

 volves the frequent fall of the former, is a very marked 

 distinction between that genus and the present. In some 

 forms of Loxosoma, however, there is much more appear- 

 ance of a separation between the two regions than in 

 others, though in no case is the body deciduous. 



Several species of the present genus have been dis- 

 covered, ranging from the Bay of Naples to tlie Arctic 

 Seas and the North- American coast. They live chiefly. 



