Plate 76. 



1-5. Cystechinus Loveni A. Ag. ; Station 3415. 



1. Specimen 88 mm. ia length (PI. 75, fig. 2), seen in profile, faoing the right poster 



interambulacruni. 



2. The same as fig. 1, seen from the anterior extremity, facing the odd ambulacrum, 

 o. The same specimen, facing the odd interambulacrum. 



4. Fragment showing the actinostome and the surrounding plates, seen from the exter; 



5. The same fragment, seen from the interior of the test. 



All figures natural size. 



