LOVENECHINUS. 



331 



"In the corona the general relations of the interambulacra and ambulacra arc remarkably 

 clear owing to the depression of the adradial sutures, from which the interambulacra rise up 

 in a flattened curve, and the ambulacra in a more prominent sharply rounded curve. 



243 



TEXT-FIGS. 240-243. Lovenechinus lacazci (Julien). Lower Carboniferous Limestone, Kirkby Stephen, Westmoreland, 

 England; Yorkshire Philosophical Society Museum Collection. Drawn by A. H. Searle under the direction of F. A. Bather. 



240. View of whole specimen, oriented by the madreporic pores in genital 2. X 1.5. Four columns of plativ in 

 each ambulacral area, pore-pairs biserial. Four columns of plates in each interambulacral area. Same specimen as photo- 

 graphic figure, Plate 35, fig. 7. 



241. Ambulacrum III enlarged Xabout4. Plates X, and XX, correspond with the similarly marked plates in text-fig. 240. 



242. Ambulacral detail much enlarged. 



243. Dorsal aspect enlarged X about 3.8, showing small triangular exsert oculars; genitals high, wide, with three 

 genital pores each, excepting genital 3, which has four pores; fine madreporic pores in genital 2, a very rare character to 

 be seen in this family (p. 172). (The lettering of the figures is mine.) 



