338 W. G. Van Name — Bermuda Ascidians. 



than the average of a large number of specimens collected at Wood's 

 Hole, Massachusetts. They were rather yellower in color during 

 life and appear to be somewhat less compressed laterally, though 

 this may be partly due to the fact that the zooids are in no case 

 crowded together, the colonies being loose and straggling. 



The writer collected specimens in May, 1901, under stones at 

 various points, including Waterloo, on Castle Harbor, Coney, and 

 Long Bird Islands, Somerset Island, and Hungry Bay. It is widely 

 distributed, but at that season of the year, at least, it is not very 

 abundant or conspicuous. 



Genus Ecteinascidia Herdman, 1880. 



Body elongated, usually tapering posteriorly, sometimes with a 

 short peduncle ; but not divided into thoi'ax and abdomen. Test 

 thin and membranaceous, containing no blood vessels. 



Mantle thin, musculature consisting of transverse bands. 



Branchial sac with internal longitudinal bars which are not papil- 

 lated. 



Dorsal lamina usually represented by a series of tentacular lan- 

 guets. 



Viscera placed on the left side of the branchial sac. 



Ecteinascidia turbinata Herdman. 



Ecteinascidia turbinata Herdman, Prelim. Rep., Proe. Roy. Soe. Edin., p. 



724, 1879-80. 

 Ecfeinasidia turbinata Herdman, Report Voy. Challenger, part xvii, p. 243, 



pi. xxxvi, figs. 1-6. 

 See also Lefevre, Budding in Ecteinascidia, Anat. Anzeiger, vol. xiii. 1897. 



Plate XLVII. Figures 4 and 6. Plate L1X. Figure 116. 



Prof. Yerrill (17) states that he found this species in 1S9S. There 

 were, however, no specimens among the ascidians he brought home. 



In 1901 the writer found what he considers to be immature speci- 

 mens of this species, but no adults. 



The following is condensed from Herdman's description of the 

 adult : 



Shape of each individual elongated, the anterior three-fourths 

 almost cylindrical, the posterior part tapering rapidly to a short, 

 slender stalk. Apertures sessile and minute, both at the right side 

 of the anterior end. They are not lobed. 



Length of body 30"' m , breadth near the anterior end 10 mm . Test 

 thin and membranaceous, transparent. Internal longitudinal bars of 



