W. G. Van Name — Bermuda Ascidians. 335 



This is a common species. It was obtained both in 1898 and 1901, 

 also by Prof. Goode, as well as by the Challenger Expedition. The 

 writer has collected it in Castle Harbor and on the north shore of 

 Coney Island, where a number of colonies were found under stones 

 a little below low water mark. 



Genus Rhodozona, n. gen. 



An examination of Diazona picta Verrill (IV) shows that it differs 

 so materially from the type of Diazona that it must be made the 

 type of a new genus, having characters intermediate between 

 Diazona and Distoma or Clavelina. 



It differs from the former genus in having the colony divided up 

 into a large number of small lobes, in the absence of internal longi- 

 tudinal bars from the branchial sac, and in having no lobes to the 

 apertures. It has a smooth-walled stomach, except for a single 

 longitudinal ridge on the inner surface. 



Rhodozona picta (Verrill). 



Diazona picta Verrill, Trans. Connecticut Academy, vol. x, pt. 2, pi. lxx, fig. 

 8, 1900. 



Plate XLVI. Figure 3. Plate XLVII. Figure 5. 



Plate LX. Figure 122. 



" Forms large gelatinous colonies, consisting of a massive main 

 stem from which arise more or less numerous lob^s, each lobe often 

 containing 12 to 20 zooids, which, in expansion, are much exsert 

 above the common mass, the free portion being slender and three or 

 four times as high as broad. Apertures, when expanded, on short 

 terminal tubes, the oral one larger and higher than the atrial. 



" General color usually translucent pinkish white ; the oral aper- 

 ture surrounded by a band of bright carmine-red, edged on both 

 , sides with flake-white ; a stripe of the same carmine color extends 

 from the oral band down the ventral side of each zooid. 



" Height of the larger colonies, 125 to 160 mm ; breadth about the 

 same; height of free part of zooids, in life, 15 to 20 m,n ; their diam- 

 eter, 5 to 6 mm ; diameter of oral tube, about 2 mm ." (Verrill IT.) 



The test is gelatinous and transparent and of similar character to 

 that of Diazona. In young colonies and in newly developing lobes 

 of larger colonies, where the zooids are still small, they do not pro- 

 ject above the surface of the lobe. Such specimens may, however, 

 be readily identified by the color and the great numbers of anasto- 



