162 Bulletin, Vanderbilt Marine Museum, Vol. IV 



Text fig. 10. — Table from the skin of Cucumaria frondosa (Gunnerus) X 200. 



(After Mortensen.) 



bulacra. None of the pedicels has the usual terminal, perforated, 

 calcareous plate. The calcareous deposits of the skin are in the form 

 of irregular, usually smooth, perforated plates which vary greatly 

 in size, number and distribution, being less abundant in the larger, 

 older specimens. The largest plates occur near the cloacal opening, 

 but in this species they do not form the "anal teeth." The plates 

 found at the base of the pedicels and tentacles are more irregular 

 and often bear slight projections, or more or less well-defined ridges. 

 The calcareous ring is quite slender and imperfectly developed, with 

 the radial pieces a bit wider than the interradial pieces, with a very 

 wide, deep notch in the posterior margin; the interradial pieces are 

 without this notch. The stone canal is simple, of moderate size, and 

 has from one to six madreporic plates. The polian vessel is normally 

 single, very long. 



Keferences: Holothuria frondosa Gunnerus, Vet. Akad. Handlg., 

 vol. XXVIII, p. 115, pi. 4, figs. 1, 2, 1767. 



Cladodactyla pentactes Gould, Invert, of Mass., p. 345, 1841. 



Cucumaria frondosa Forbes, Hist, of British Starfishes and other 

 Echinod., p. 209, fig. on p. 209, and full synonymy, 1841. — Bell, 

 F. J., Cat. Brit. Echinod. in Brit. Mus., p. 39, 1892 (with early 

 synonymy). — Doderlein, L., Wissenschaftliche Meeresuntersuc- 

 hungen, Biol. auf. Helgoland, N. F., Abth., p. 229, 1900.— H. L. 

 Clark, Rept. U. S. Fish Comm., vol. XXII, p. 566, pi. 11, figs. 

 65, 66, pi. 12, figs. 76-80, 1904; Bull. U. S. Bur. Fish., vol. XXXI, 

 pt. 2, p. 613, 1911. — Mortensen, Danmarks Fauna, Echinod., 



