38 CELLULARIID^. 



In the larger species the characteristics just referred to 

 are much less strongly marked, and there is a tendency 

 towards a much stouter and more erect habit. 



The Menipea are widely distributed. A small group 

 occurs in the Arctic Seas, of which two forms at least 

 range to the North- American coast (Gulf of St. Law- 

 rence and Bay of Fundy). In these northern regions 

 they grow vigorously, and seem to produce their ovicells 

 much more freely than in more genial climes. They have 

 also occurred at the extreme point of the South-American 

 continent (Tierra del Fuego and Falkland Islands), in 

 New Zealand and Australia, where they are well repre- 

 sented, and in South Africa. The Arctic species are 

 closely related to M. ternata, and offer a decided con- 

 trast in several points to the Australian forms. The ovi- 

 cells of one of the latter Sir Wyville Thomson describes 

 as immersed ; and if this character should be general 

 throughout the southern group, it may perhaps have a 

 claim to generic rank. 



Menipea ternata, Ellis and Solander. 

 Plate VI. figs. 1-4. 



Cellaria tekjjata, Efl. it Sol. Zooph. 30. 



Crisia ternata, Lumx. Pol. Cor. flex. 61. 



Tkicellaria ternata, Flon. B. A. ri40 : Gray, B. M. Cat. Eadiata 113. 



Ckllllauia ternata, Johnsf. B. Z. (ed. 2) i. 335, \A. lix. : Smiff, Krit. For- 



teckn. iii. 282 (1867). 

 Cellarina gracilis, J^a7i Ben. Bull. Ac. Boy. Belg. xv. 7 (sep.), pi. x. 



figs. 1, 2. 

 Menipea ternata, Busl; B. M. Cat. i. 21, pi. xx. figs. 3-5. 



Zoarivm confervoid, forming delicate white bushy tufts, 

 dichotomously branched, the branches stragghng ; in- 

 ternodes consisting of a triplet of cells. Zocecia elon- 



