SYSTEMATIC AND BIOLOGICAL ACCOUNT 



97 



Maresearsia praeclara gen.n., sp.n. 



For many years past I have been familiar with a remarkable Prayid, obviously related to Amphi- 

 caryon acaule Chun and to the new species ernesti, as well as to Haeckel's Mitrophyes peltifera. 



Polygastric stage. The two nectophores, both of which are functional, though one is somewhat 

 reduced or less developed than the other, fit in to one another to form a globular mass about 2 cm. 

 in diameter. The basal part of the lateral and radial canals of the nectosac are hypertrophied as in 



Nlorv 



Nvest 



Som 



srnm 



Text-fig. 46. Maresearsia praeclara gen.n., sp.n., lateral view, x 6-6. Beebe, Bermuda Oceanographic Expedition, 1929, 

 i828(-o) m. The smaller nectophore has been restored to its original position. 



the other two species. The gastrozooids are large, and measure 3-5 mm. in length. A study of the 

 figures (Pis. VI, VII fig. 1; Text-figs. 46, 47) will make an extended description of the nectophore 

 unnecessary. 



Eudoxid stage. Many eudoxids are still attached to the holotype by long stalks. The bract is 

 similar to that found in Amphicaryon acaule, but there is a lateral notch, and the two hydroecial canals 

 curve round on themselves in a nearly circular course. The gonophores are of a type usually found in 

 Prayids and are too sac-like to warrant detailed description. A minute description of the eudoxid 

 is unnecessary at this stage, and figures (PI. VII, figs. 2-4; Text-fig. 48A) will be sufficient for its 



identification. 



„ , 13 



