Bull. U. S. F. C. 1902. 
Plate 1 1 . 
Figs. 65, 66. Cucumaria frondosa (one-half natural size). — 65. Side view. 66. Dorsal view. 
Fig. 67. Thyone briareus. Dorsal view (natural size). 
Figs. 68, 69. Thyone unisemita (natural size). — 68. Side view. 69. Ventral view. 
Fig. 70. Cucumaria pulchcrrima. Side view (natural size). 
Fig. 71. Thyone scabra. Side view of a young specimen (natural size). 
Fig. 72. Trochostoma obliticum. Side view of contracted alcoholic specimen (natural size). 
Fig. 73. Caudina arcnata. Side view of contracted alcoholic specimen (natural size). 
Fig. 74. Synapta inhxrens. Dorsal view (natural size). 
Fig. 75. Synapta roseola. Dorsal view (natural size). 
