60 (Bzdletin of the ^Natural History Society. 
It has already been pointed out in Section I. of this paper (p. 20) that 
this species is edible. Some further investigations into its value for 
food are much needed. 
26. Peiitacta miniita, (Lutken), Verrill. Cucumaria 
minuta, (Fabr.), (M). Ocnus Ayresii, St., (D). Cucum- 
aria frondosa (Gui^JS".) Forbes, (U), [Young.] 
Description'. (D) p. 16. 
Figure. 
Distribution, (a) General ;— to one hundred and 
one fathoms. Maine, northward, and North European seas. 
(h) In N. B. waters; — Grand Manan, “dredged on shelly 
bottoms, in twenty-five fathoms,” Stimpson, (D). 
There is some doubt as to whether this is a distinct species, or only 
the young of P. frondosa. Duncan and Sladeii in their splendid memoir 
(U), hold to the latter view; Prof. Verrill, (L), CW), and others, believe 
the former. It is introduced here as a distinct^ species, on the authority 
of Prof. Verrill, who has had better opportunities to study it than 
others have had. 
Following is Stimpson’s description of the species, (D): “Completely 
encased in calcareous matter in the form of polygonal plates somewhat 
variable in size, but usually equalling in area one-half that of the disk 
of the sucker. These plates have regular and equal perforations in 
quincunx, smaller in width than their interspaces. The suckers are 
stout, and are distributed distantly in five rows, in the three ventral of 
which they are much larger than in the two dorsal. There are about 
seven suckers in each row, which are encased in the calcareous plates 
on their sides. The tentacula are short, and have few blunt branches. 
The color is w^hite, or pale fawm. Length usually two-tenths of an 
inch; breadth 0.15 inch.” Nothing is knowm of its habits or develop- 
ment. 
Order II. APODA. 
No amhidacral feet, usually no respiratory tree, and the tentacles usually branched 
or pinnate. 
FAMILY SYNAPTID^. 
Hermaphrodite and without respiratory trees. With symmetrical calcareous 
bodies in the skin. 
27. Caiidina arenata, (Gould), Stimpson. [See Plate,. 
Fig. 18.] 
Description. (C) p. 143. (M) p. 358. 
