574 LOVENIA. 



LOVENIA. 



Lovenia Des., 1847, C. R. Ann. Sc. Nat., VIII* 



The ambulacra! petals are somewhat triangular, adjoining zones form 

 two crescents on each side of the apex, with the concave sides towards 

 each other. Large tubercles upon the upper part of the test, except in 

 the posterior interambulacrum. There is an internal fasciole as in Echino- 

 cardium and in Breynia, hut no peripetalous fascioles as in the latter; a well 

 developed anal fasciole extends into the pit in which the anal system is 

 placed. Test thin, elongate, arched. Ilattened. truncated posteriorly j remark- 

 ably large ampulla' support the large tubercles, and form a close pave- 

 ment on the inner surface, over the whole floor of the ac final portions of the 

 test, they correspond to the large tubercles of the upper part of the test ; 

 these commonly carry long curved spines; anterior groove slight ; pores very 

 small. 



Lovenia cordiformis 



\ Lovenia cordiformis I.itk., 1872. in A. A.G., Hull. M. ('. '/... III. 



Differs from the other species of the genus by the greater convexity of 

 the anterior part of the test, its more anterior apical system, the small 

 number of primary tubercles in the lateral amhulacral spaces, and the small 

 si/.e of the internal pouches of the primary sunken tubercles of the actinal 

 surface. The great flatness of the posterior edge of the actinostome is re- 

 markable, as well as the comparatively large size of the tubercles on each 

 side of the Hat abaetinal part of the odd anterior ambulacrum, within the 

 internal fasciole (not within the peripetalous fasciole. as was accidentally 

 printed in the original description). The posterior extremity of the test is 

 vertically truncated ; the anal system is not deeply sunken as in L. elongata : 

 the whole of the suhanal plastron is within the posterior a\'j:v of the test ; the 

 broad upper part of the fasciole alone spreading into the slightly re-entering 

 lower edge of the posterior extremity of the test, immediately below the 

 anal system. The actinal plastron is small, triangular, at the posterior edge 

 of the actinal surface. 



* On p. 139, 3d line, for Lovenia Agass, 1847, C. R read Lovenia Des., 1847, in Agass., 



C. R 



