PLATE XXiy. 



All the Figures drawn by Mr. J. Burkhardt. 



Fig. 327. Boltenia Burkliardti, from a specimen living in the Aquarial 

 Gardens, Boston, 1859. Also found living at the same place, June, 

 1860. 



Fig. 328. Olandtila mollis. 



Fig. 329. The same. 



Fig. 330. Ascidia psammoptaora, from the original specimen. 



Fig. 331. Tlie same. 



Fig. 332. Ascidia ocellata, from the original specimen. New Bedford, Dec. 



5, 1848. 



Fig. 333. Ascidia amphora, from the original specimen. 



Fig. 334. Ascidia carnea, enlarged, from the original specimen. 



Fig. 335. The same, natural size. 



Fig. 336. Cynthia hirsiita, froin the original specimen of Ascidia liirsuta. 



Fig. 337. Boltenia rubra. The drawing being too long for the plate, the 

 peduncle has been given in sections; the lower space represents 

 three inches, the upper four inclies. 



Fig. 338. Boltenia microcosmus. In this, also, a space is left in the pe- 

 duncle, representing a section of five inches. 



