258 NOVA SCOTIAN ECHINODERMATA.—HONEYMAN,. 
2nd. Cuvieria Fabricii is represented by ore large and 
three smaller ones. This is clad with a coat of mail, calcareous 
plates, thickly tuberculed—imbricated. One of these was caught 
in Bedford Basin. It was living, with tentacles fully spread ; its 
colour was a brilliant red. It was very beautiful; we were 
sorry when it died. The plates overlap, having rounded free 
edges toward the medium line of the back. The ventral dise has 
two rows of feet extending along the sides. There is no median 
line. The largest specimen is 4 inches in length and 23 inches 
in breadth. A common name is “ Sea Orange.” 
3rd. Pentacta frondosa—* Sea Cucumber.” Of this we have 
four specimens. They are very much contracted and do not 
afford any satisfactory measurement. Their colour is faded 
purple. The tentacles of three of them appear. The tube feet 
are distributed over the quarter part of the body. The skin is 
very tough. Portions of this were dissolved in caustic potassa. 
Irregular forms only survived. The tentacles of one were treated 
in the same manner with a like result, excepting, certain foreign 
bodies which are very beautiful. Of these we recognize the 
familiar diatoma vulgare in various forms of fission, Some of 
these are very striking and instructive. There is another form 
which we also encounter very frequently. In the present case 
some are perfect. These resemble a wheel with 6 and 7 
spokes without the felloes. The centre is polygonal. We con- 
sider this also to be a marine diatom. 
4th. Trochostoma (Molpadia) oolitica. This is a rare “ Holo- 
thurian.” Our specimen is the only one we have seen except in 
figures. It was caught in our harbor in 1873 by Captain C. D. 
Grant, of the brigantine Strickland, and presented to the 
Museum. I regarded it as a great curiosity and preserved it 
carefully in alcohol. When fresh it was of a lovely purple colour. 
This changed considerably in the alcohol. It has a circular 
mouth, a long neck, and an oval body with a short tail. Its 
lengtn from the oval to the anal opening is 64 inches; the 
greatest girth is 6 inches. 
When the naturalists of the U. S. Fish Commission were in 
