Plate 77. 

 1-4. Cystechinus Loveni A. Ag. ; Station 3415. 



1. Specimen 83 mm. in length, from the actinal side (PI. 75, fig. 1). 



2. Abactinal view of specimen 88 mm. in length (PI. 75, fig. 2). 



3. The same as fig. 2, seen in profile, facing the right anterior ambulacrum (PL 7G, fig. 1). 



4. Part of the right posterior interambulacrum at the ambitus, with the adjoining abactinal 



plates showing the sporadic resorption of the primary and miliary tubercles. 



