PLATE XXIV. 



All the Figures drawn by Mr. J. Burkhardt. 



Fig. 327. Boltcnia Burkhardti, from a specimen living in the Aquarial 

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

 1860. 



Fig. 328. Olandula mollis. 



Fig. 329. The same. 



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



Fig. 331. The 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 liirsuta, from the original specimen of ^4scicZc'a 7a'/'s;ita. 



Fig. 337. Bolteiiia 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 inches. 



Fig. 338. Boltcnia microcosmns. In this, also, a space is left in the pe- 

 duncle, representing a section of five inches. 



