394 W. G. Van Name — Bermuda Ascidians. 



The branchial sac has 6 wide folds on each side separated by nar- 

 row interspaces on which there are but four or five internal longitu- 

 dinal bars. There are, however, about T or 8 bars on the spaces each 

 side of the endostyle and dorsal lamina. The bars are wide and 

 flattened and placed near together, being separated by only four or 

 five stigmata in the spaces between the folds and by a less number 

 on the folds. Between the base and summit of the folds there are 

 sometimes as many as 14 or 15 bars. The stigmata are short and 

 rather wide. 



The transverse vessels are mostly of about the same size with an 

 occasional much larger one. In addition there are the usual fine ves- 

 sels which cross the middle of the stigmata. There is often much 

 red pigment on the vessels of the sac. The dorsal lamina is provided 

 with a series of slender tentacle-like languets. 



Prof. Verrill states that the anus has about 12 lobes. This is not of 

 value as a specific character. One specimen had but 4 barely percep- 

 tible lobes. The intestine forms a broad loop. The stomach is but 

 little enlarged and is pai'tly covered by the large greenish hepatic 

 gland which lies dorsal to it. 



The reproductive glands are irregularly lobulated or foliated 

 bodies arranged along each side of the genital ducts. When much 

 enlarged they are so crowded that their serial arrangement is not 

 very apparent. On the left side one series of the glands lies within 

 the intestinal loop. Another set lies along the dorsal side of the 

 intestine, the duct following close along the intestine and the glands 

 lying only along one side of it, while in the case of those Avhich lie 

 within the loop, as well as the single set which is present on the right 

 side of the body, they lie on each side of the duct. 



This appears to be the commonest member of the family at Ber- 

 muda, at least in shallow water, where it is found adhering to stones, 

 shells, corals, etc. 



Halocynthia riiseana (Traiistedt) var. munita, nov. 



Plate LVI. Figure 84. Plate LVII. Figures 85 and 87. 

 Plate LXIII. Figure 141. 



In addition to H. ruhrilabia there is another species of the genus 

 found at Bermuda, but it is much less common. It was only poorly 

 represented by one or two small specimens in Prof. Verrill's collec- 

 tion and he considered it identical with Traustedt's West Indian 

 species, Cynthia Riiseana. In 1901, I obtained three good sized 

 specimens, of which the largest measures 28'"™ by 25"'". The others 



