130 EXPLANATION OP PLATES. 



Fig. 5. Another of the same. S. 1 . 



Fig. 6. Another of the same. S. 1. 



Fig. 7. Another of the same. S. 1. 



Fig. 8. Dissection to show the alimentary and reproductive viscera, 

 about nat. size, at., atrial aperture; e., endocarp of con- 

 nective tissue ; i., intestine ; l.g., left gonad ; r.g., right gonad ; 

 st., stomach. 



PLATE CYN. XIV. 

 Fig. 1. Styela Whitelcggii, n. sp., from right side, nat. size. 



Fig. 2. Another specimen, reduced to half nat. size to show shape and 



large roots. 



Fig. 3. Part of branchial sac from inside. S. 1. 

 Fig. 4. Dorsal tubercle and tentacles, slightly enlarged with lens 

 Fig. 5. Part of surface of dorsal tubercle, magnified to show scattered 



openings. S. 1. 



Fig. 6. Dissection to show rectum and reproductive organs, slightly 

 enlarged, a, anus ; At, atrial aperture ; e, gelatinous pads of 



connective tissue; g, gonad, and d, one of its ducts; r, rectum. 



PLATE CYN. XV. 



Fig. 1. Sti/ela pcrsouata, n. sp., nat. size. 



Figs. 2 and 3. Outlines of two other specimens, nat. size. 



Fig. 4. Part of branchial sac. S. 1. 



Fig. 5. Tentacles of same species, showing the three sizes. S. 1. 



Fig. 6. Dorsal tubercle. S. 1. 



Fig. 7. Dorsal tubercle of another specimen. 



Fig. 8. Sti/ela stolonifcra, n. sp., nat. size. 



Fig. 9. Dissection of posterior end of test, nat. size. 



Fig. 10. Dorsal tubercle. 



Fig. 11. Part of branchial sac. 



PLATE CYN. XVI. 



Fig. 1. Polycarpafungiformis, n. sp., nat. size 



Fig. 2. Body of same, from other side, nat. size. 



Fig. 3. The same, with test removed, nat. size. 



Fig 4. Group of polyearps in situ, slightly enlarged. 



Fig. 5. Two polyearps attached to the mantle, enlarged. 



Fig. 6. Part of branchial sac from inside. S. 1. 



Fig. 7. A few stigmata, to show muscle fibres. S. %. 



