.52 
(Bulletin of the Jhatural History Society. 
sis, Verrill. (L). Euryecliinus granulatus, Verrill. 
(L). Echimis Drohachiensis, Mull. (P). [See Plate, 
Fig. 13]. 
“Sea-Urchin,” “Sea-Egg,” etc. 
Description. (K) p. 101, (0) p. 277, (U) p. 19. 
FiCxURE. (K) p. 102, (0) pi. X., (Q) pi. XXXV., (U) pi. II. 
Distribution, {a) G ejieral ;—h\iioi"d\ to 640 fathoms. 
Circumpolar. From Great Britain and Norway, all around 
the X^orth Atlantic and down the American coast to New 
Jersey. North Pacific from Kamtchatka to Alaska and 
Vancouver Island. 
{h) In N. B. waters ; — Reported from St. Croix (now 
Dochet) Island in 1604 by Champlain. {Voyages du Sieur de 
€ham 2 olain, Paris, 1613). Grand Manan, low-water to half a 
fathom, very common. “In this zone, these animals are so 
crowded together that it is impossible in.most places to thrust 
an oar to the bottom without striking some of them,” Stimp- 
S071, (D). Eastport, littoral to twenty fathoms, very abundant, 
Verrill, (L), (N). Bay of Fundy, low water to 109 fathoms, 
very abundant, Veirill. (Q). Passamaquoddy Bay, very abun- 
dant, Ganong, (X). Shediac, Gulf of St. Lawrence, Whit- 
eaves, (P.) Exceedingly abundant everywhere upon the 
southern coast. Up the St. Croix River as far as the Devil’s 
Head. Manawoganish Island, near St. John. 
The common Sea-Urchin is the most abundant, best known and most 
■easily recognized of all our Echinoderms. It cannot be confounded 
with any other animal upon our coast, though the writer has known it 
to be mistaken for a plant! In form it is somewhat hemispherical, 
with the flat side resting upon the ground, while the dead shell denuded 
of its spines may be likened in shape to an old-fashioned, smooth door- 
knob. 
The largest specimens are four inches in diameter, including the 
spines, which are from one-half to three-fourths of an inch long. The 
latter, which are green in color, are attached to the shell by a ball and 
socket joint, and among them may be seen the ten meridional bands or 
zones of greatly extensible purplish tube-feet (each terminating in a 
sucking disk) which serve both for taking small prey and for locomotion. 
It can move but slowly and lives upon all sorts of bottoms, from mud 
to rock, from between tide marks down to considerable depths. It 
feeds upon both animal and vegetable food. With its five sharp teeth. 
