PLATE 17. 
1-9. Echinonéus cyclostomus LEsKE. 
Sphaeridia. 
1-6.— Alcoholic specimen, test measuring 30 mm., 6, test measuring 26 mm. long. Barbados (?). 
1.— Both from right posterior ambulacrum, height 0.22 mm., 0.20 mm. 
2.— From right anterior ambulacrum, height 0.19 mm. 
3.— Both from odd anterior ambulacrum, height 0.20 mm., 0.19 mm. 
4.— Both from left anterior ambulacrum, height 0.17 mm., 0.19 mm. 
5.— From left posterior ambulacrum, height 0.19 mm. 
6.— Both from right anterior ambulacrum, height 0.20 mm. 
7-9.— Aleoholic specimen measuring 23 mm. long. Fakarava Island, Paumotu Islands. 
7.— Both from right posterior ambulacrum, height 0.13 mm., 0.12 mm. 
8.— From odd anterior ambulacrum, height 0.14 mm. 
9.— Both from left posterior ambulacrum, height 0.14 mm., 0.12 mm. 
Figures 1-6 the magnification is slightly reduced, the others the same as those of Plate 16. 
