3*70 W. G. Van Name — Bermuda Ascidians. 



The writer collected a number of small colonies of this form 

 under stones near low-water mark at Hungry Bay, May 21st, 1901. 

 One or two specimens were also found in similar situations at 

 Waterloo, on Castle Harbor, about the same date. None of the 

 specimens examined contained large eggs, though in some the testes 

 were well developed. 



Diplosoma atropunctatiim. n. sp. 



Plate LIII. Figure 56. Plate LVIII. Figure 103. 



Plate LXII. Figure 137. 



This species is closely related to D. lacteum, and the writer 

 describes it with some reluctance, as he has but a single specimen. 

 This is a colony about 25 mm across, which was found growing on a 

 coral {Porites) in Harrington Sound, April 30th, 1901, in water 

 about twelve feet deep. The test, both in the living and preserved 

 condition, is perfectly colorless and transparent, allowing the small 

 zooids, which are but little larger than those of D. lacteum, to be 

 seen with the greatest distinctness. This is in strong contrast to 

 the milky white opaque test of living specimens of the last men- 

 tioned species. The test cavities are also less developed, leaving 

 more test substance than is usual in D. lacteum. 



The whole abdomen of the zooid is deeply colored with blackish 

 or dark greenish pigment, contained in the mantle cells as described 

 in the last species, and as the thorax is colorless, the abdomens of 

 the zooids are conspicuous as small black dots, and the colony might 

 easily be mistaken for a mass of eggs of some mollusk. 



I found no noticeable differences in the structure of the zooids by 

 which they could be distinguished from those of D. lacteum. ]\Iany 

 contained both large eggs and large testes. 



Genus Diplosomoides Herdman, 1886. 



Differs from Diplosoma only in having stellate calcareous spicules 

 in the test. 



Diplosomoides fragile n. sp. 



Plate LIII. Figures 57 and 58. Plate LXI. Figure 126. 



In appearance, this species resembles a Leptoclhnnii. as it forms 

 very thin, flat, expanded colonies often 60 m,r ' or 80 mm across, of a 

 very pure white color, which is produced by the abundance of 

 minute spicules. These are generally not much over .02 mm in diame- 



