EXPLANATION OF PLATES. 



Plate xl. 



Figure 1. — Imogine oculifera Girard, p. 475. Dorsal view of a young living specimen 

 with dendritic, rose-colored makings; x 20. Wood's HoU, Mass. 



Figure 2. — Eushjlochus ellipticus (Girard) Y., p. 467. Dorsal view of a living speci- 

 men, much compressed; x 6. Savin Rock, near New Haven, Conn., 1868. 



Figure 3. — Stylochus zebra V., p. 463. Dorsal view of a living specimen; x 4. 

 Wood's Holl, Mass., Sept. 23, 1882. 



Figure 4. — Planocera nehulosa Girard, p. 472. Dorsal view of a living specimen, x 5. 

 New Haven, Conn., 1870. 



Figure 5. — Lejytoplana ellijisoides Girard, p. 483. Dorsal view of a living specimen ; 

 X 5. Eastport, Me., 1870, at low-water. Color orange-brown with irregular 

 spots of dark brown and small specks of white. (The clusters of ocelli occupy 

 unusual positions, owing to a peculiar state of contraction). 



Figure 6. — Leptoplana ellvpsoides. Dorsal view of a large example, from life, in the 

 act of creeping; x 4. Eastport, Me., August 10. 1872. 



Figure 7. — Discocelis mutalnlis V. (?), p. 493. Dorsal view of a young living speci- 

 men ; much enlarged. Surface, Wood's Holl. Mass., August 16, 1882. Trans- 

 parent, with yellow spots around the margin. 



Figure 8. — Leptoplana angasta V., p. 485. Dorsal view of a young living example, 

 X 10. Provincetown, Mass., from the bottom of a whaler. 



Figure 9. — Fovia affinis (?). See foot-note, p. 505. Dorsal view ; x 6. Noank, Conn., 

 in harbor, July 16, 1874. 



Figure 10. — Bdelloura Candida Girard, p. 499. Ventral view (a), from life; dorsal 

 view(&); about natural size ; 10?*, the same, posterior sucker ; x 4. 



Figures 1, 3, 6, 7, 10 were drawn from life by J. H. Emerton ; figure 9 by J. H. 

 Blake ; the rest by the author. 



Plate xli. 



Figure 1. — Eustylochus ellijjticus (Girard) V., p. 467. Dorsal view of a living speci- 

 men; x4. la, the same, one of the tentacles; more enlarged. Newport, R. I., 

 on piles of railroad bridge. August 20, 1880. 



Figure 2. — Eurylepta maculosa V., p. 495. Dorsal view of a living specimen ; x 5. 

 Wood's Holl, Mass., on piles, July 15, 1881. 



Figure 3. — The same. Dorsal view of a living specimen ; x 5. Naushon Island, at 

 low-water mark, August 20, 1887. 



Figure 4. — Trigonoporus deyidriticus Y., i:>. 4d]. Dorsal view of a living specimen; 

 x4. Sta. 317, off Cape Cod, 25 fath., 1879. Color light pink with a pale 

 central area. (The clusters of ocelli are too angular and definite.) 



Figure 5. — Trigonoporus folium V., p. 48.7. Dorsal view from life; x 2. Fig. 5a, 

 the same, ventral view. Sta. 784, off Point Judith, R. I., in 20 fath., 1880. 



