EXPLANATION OF PLATES, 125 



Fig. 3. Transverse section of the peduncle of same. S. 1. 



Fig. 4. Part of the branchial sac from the inside. S. 1. 



Fig. 5. Stcreoclavdla sp. (? n. sp.), nat. size. 



Fig. 6. Part of the mantle. S. 1. 



Fig. 7. Part of the branchial sac, from inside. S. 1. 



Fig. 8. Some of the dorsal languets. S. 1. 



PLATE Asc. I. 



Fig. 1. Ciona sp. (probably C. intestinalis, L.) from back of Mac-ippe 



spinosa. 



Fig. 2. Body removed from test, nat. size. 

 Fig. 3. Ciona intestinalis, L. (?), from off' Cockatoo Id. ; body removed 



from test, left side, nat size. 

 Fig. 4. Dorsal tubercle of same. S. 1. 

 Fig. 5. Ascidia inccrta, n. sp. 

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

 Fig. 7. Part of dorsal lamina. S 1. 

 Fig. 8. Dorsal tubercle and tentacles. S. 1. 



PLATE Asc. II. 



Fig. 1. Ascidia phallusioides, n. sp., specimen B., half nat. size, from 



the right side. 



Fig. 2. Part of wall of branchial sac. S. 1. 

 Fig. 3. Section of test showing vessels. S. 1. 

 Fig. 4. Part of the same. S. . 

 Fig. 5. Tentacles and dorsal tubercle. S. 1. 

 Fig. 6. Part of dorsal lamina. S. 1. 

 Fig. 7. Dissection jof the nerve ganglion and neural gland, showing the 



numerous secondary openings, slightly enlarged. 

 Fig. 8. Part of the surface of the neural gland, showing the openings 



into the atrium. S. 1. 



Fig. 9. Part of surface of test, slightly enlarged. 

 Fig. 10. Part of surface of test in deeply pigmented form (No. 12), 



under a Coddington lens. 



PLATE CYN. I. 



Fig. 1. Group of 14 specimens of Boltcnia pachydermatina, Herdm., 

 adhering together by the base of their stalks, slightly less than 

 half nat. size. 



