PLATE 6. 
1-17. Echinonéus cyclostomus LEsKE. 
1-10, 12-17. Actinal side of test. 11. Abactinal side of test. 
1.— Specimen, including spines, measuring 30 mm. long. Lord Howe Island. 
2.— Specimen measuring 34 mm. long. Lord Howe Island. 
3.— Specimen measuring 27.5 mm. long. Mauritius. 
4.— Specimen measuring 30 mm. long. Mauritius. 
5.— Specimen measuring 9 mm. long. Mauritius. 
6.— Specimen measuring 27 mm. long. Makemo Island, Paumotu Islands. 
7.— Specimen measuring 19 mm. long. Pacifie (?). 
8.— Specimen measuring 20mm. long. Pacifie (?). 
9.— Specimen measuring 23 mm. long. Pacifie (?). 
10.— Specimen measuring 27 mm. long. Pacifie (?). 
11.— Abactinal side of a specimen measuring 20 mm. long. Cuba. 
12.— Specimen measuring 6 mm. long. Port Antonio, Jamaica. 
13.— Specimen measuring 9 mm. long. Jamaica. 
14.— Specimen measuring 10 mm. Jong. Jamaica. 
15.— Specimen measuring 16 mm. long. Jamaica. 
16.— Specimen measuring 22 mm. long. Jamaica. 
17.— Specimen measuring 16 mm. long. Florida. 
All the figures are enlarged once the natural size. 
Figures 1, 2, 4, 5, 7-11 are from dry specimens; the other figures are from alcoholic specimens. 
