PLATE 15. 
1-12. Echinonéus cyclostomus LeEsker. 
Oral and anal systems. 
1.— Alcoholic specimen from Makemo Island, Paumotu Islands, measuring 4.40 mm. long. 
2.— Alcoholic specimen from Makemo Island, measuring 27 mm. long. 
3.— Dry specimen from Lord Howe Island, measuring 30 mm. long. 
4.— Dry specimen from Lord Howe Island, measuring 34 mm. long. 
5.— Dry specimen from Mauritius, measuring 27 mm. long. 
6.— Alcoholic specimen from Mauritius, measuring 27.5 mm. long. 
7.— Anal system of dry specimen from Bourbon, measuring 29 mm. long. 
8.— Oral and anal system of alcoholic specimen from Port Antonio, Jamaica, measuring 6 mim. long. — 
9.— Anal system of alcoholic specimen from Jamaica, measuring 10 mm. long. 
10.— Oral and anal system of alcoholic specimen from Jamaica, measuring 24 mm. long. 
11.— Anal system of alcoholic specimen from Florida, measuring 16 mm. long. 
12.— Anal system of alcoholic specimen from Barbados (?) 26 mm. long. 
In all the figures the distance between the two apertures, is in natural proportion. 
Figure 1 is larger proportionately. Figures 8, 9. are of the same magnification. The 
magnified equally excepting figures 3-4 which are slightly larger. f= 
