The Echinodermata of Jdew (Brunsivick. 61 
Figure. (K) p. 97. (M) pi. XX. 
Distribution, {a) General; — East Coast of America, Vine- 
jard Sound to Massachusetts Bay and Gulf of St. Lawrence. 
(h) In JV. B. waters; — Point du Chene, N. B., at low water, 
Whiteaves, (P). 
[Selenka, (M), gives as a locality for this species, Grand 
Manan. But he was probably led into error by the fact that 
Stimpson mentions this species in his Synopsis in order to 
refer it to the new genus Caudina. Stimpson distinctly states 
that it does not occur in the Bay of Fundy, notwithstanding 
its abundance on every sandy shore in Massachusetts Bay.” 
Verrill says, (Q), he has never been able to find it at Grand 
Manan.] 
This species is not likely to he mistaken for any other upon the Gulf 
coast, the peculiarity indicated by its generic name distinguishing it 
from all others. It is from two to four inches long, and over one-third 
of this length is so attenuated as to seem in comparison with the rest of 
the body like a “ tail.” When alive it is very worm-like in appearance, 
having no tube-feet, being semi-translucent and having a perfectly 
flexible skin. It shows, however, the stamp of the pentanierous Echi- 
noderm plan in the five longitudinal lines which may be traced from 
end to end of the body, the representatives of the lines of ambulacral 
tube-feet. Around the mouth are about twelve short, non-retractile 
tentacles, each divided near the extremity into several slender branches. 
The skin has a finely granular appearance, caused, as the microscope 
will show, by the immense number of little calcareous, wheel like plates 
embedded in it. In color it varies from red to flesh-color. 
Caudina lives buried a short distance in sand or mud in shallow water 
and is often thrown upon the sandy beaches of Massachusetts Bay in 
great numbers after a storm, and probably the same would be true upon 
our north shore. Little is known of its habits and nothing of its 
development. 
28. Chirodota la^vis, (Fabrictus), Grube. Trochinus 
pallidus, (C), [See Plate, Fig. 10.] 
Description. (G) p. 243. (U)p. 12. 
Figure. (U) pi. I. 
Distribution, (a) General; — Circumpolar. Eastport to 
Grenland. Finmark and Lofoten, and possibly Ochotsk Sea 
and Sitcha. 
