EXPLANATION OF PLATER. 127 



Fig. 4. Part of the inside of the branchial sac, showing parts of two folds 



and an interspace. S. 1. 

 Fig. 5. The dorsal tubercle, slightly enlarged with a hand lens. 



PLATE CYN. V. 



Fig. 1. A "combination" figure (see text, p. 24) of Microcosmus 



a it Hindis, n. sp. 



Fig. 2. Cluster of specimens, nat. size. 

 Fig. 3. Another specimen, nat. size. 

 Fig. 4. The invaginated test that lines the branchial siphon. S. 1. 



sc. zone of scales, cor. zone of corrugations, In.- zone of 



minute simple tentacles. 



Fig. ;">. Part of branchial sac from inside. S. 1. 

 Fig. 6. Plan of the transverse vessels of the branchial sac. 



PLATE CYN. VI. 



Fig. 1. Microcosmus Pamsayi, n. sp., large specimen from right side, 



nat. size. 



Fig. 2. Clump of four specimens adhering, nat. size. 



Fig. 3. A smaller specimen from left side, nat. size. 



Fig. 4. Part of branchial sac from inside. 8. 1. 



Fig. 5. Branchial siphon, dorsal tubercle, and tentacles, enlarged with 



lens. 



Fig. (i. Microcosmus ftjfinis, Heller, nat. size. 



Fig. 7. Part of branchial sac. S. 1. 



Fig. S. Dorsal tubercle. 8. 1. 



Fig. 9. Molt/ulii recumbens, n. sp., from left side, nat. size. 



Fig. 10. Same species, with test removed, from right side, nat. size. 



Fig. 11. From left side, nat. size. 



Fig. 12. Part of branchial sac from inside. S. 1. 



Fig. 13. The dorsal tubercle. S. 1. 



PLATE CYN. VII. 



Figs. 1 3, Cynthia pr&putialis, Heller. 



Fig. 1. Ci/nt)iia prteputialis, Heller, specimen B, one-third nat. size. 

 Fig. 2. The same, specimen A, one-third nat. size. 

 Fig. 3. The same, specimen C, one-half nat. size, with part of test 



cut out to show cavity in which body lies and pad-like fold at 



anterior end. 



