, Puate 60. 
1-3. Plexechinus cinctus A. Ag.; Station 3424. 
1, Abactinal part of the test of specimen weasuring 20 mm. in length, the same as Pl. 58, 
fig. 2. 
2, Abactinal part of the test of another specimen (fragment) about 20 mm. in length, 
geen from the interior. 
3. Abactinal plates of the odd ambulacrum; same as fig. 2, somewhat more enlarged. 
4, 5. Urechinus Naresianus A. Ag. 
4, Abactinal part of the test of specimen 30 mm. in length, the same as Pl. 58, fig. 5; 
“Blake” Exp., 1878-79, Station 222, off St. Lucia 422 fms. 
5. Abactinal part of the test of the same specimen as fig. 4, seen from the interior. 
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