62 Scientific Proceedings, Royal Dublin Society. 
distended trophi working the cilia of the disc vigorously, then | 
rapidly contracting itself, it again flings out the body as before 
and the same process is repeated, and so on all round the circle, 
the toes still adhering to the same spot. Though I watched for 
a considerable time, I did not once see it-either grasp or swallow a 
single morsel of food. It seems a rare species—only a single 
example occurred. Length about =: of an inch. 
Habitat.—A. bog, Co. Wexford. 
Diglena rugosa, sp. nov. 
[Pl. V. fig. 3.] 
Sp. Ch.—Body cylindric, thick at the head, and tapering to 
the toes, wrinkled; foot long, thick, cylindric; toes short, broad, 
pointed, and abruptly decurved. 
‘This species (if fully grown) is the smallest and most insigni- 
ficant member of the genus yet discovered, being scarcely half 
the length of D. caudatus, yet it presents some very striking 
characteristics. The colourless body is cylindric and vermiform, 
and tapers gradually from the head to the foot. This latter seems 
not to be marked off by the usual enfolding of the integument, 
but is a simple prolongation of the trunk, which terminates 
abruptly in a thick rounded end; the short, broad, and acutely 
pointed toes are set on near either side, and directed forward. There 
is a slight indenture in the middle of the back, and from this 
point the bodyis closely wrinkled down to the toes, and this wrinkled 
portion is continually shrunk upward with a jerk as though 
the creature were stung; the upper half is smooth and of firmer 
consistence ; the head is thick and round, the proboscis prominent; 
the ciliary disc quite ventral in position is continued down to 
near the middle of the body in a straight line; no eyes were 
apparent. I could not detect the form of the trophi, if they were 
present ; the stomach is long and narrow, and was filled with a 
granulated semifluid which -rotated rapidly. The contractile 
vesicle is of a long, narrow, oval shape, and lies upon the ventral 
floor. Its manners were very erratic; it made sudden darts from 
place to place, then stopped and twisted about into all sorts of 
contortions, as though greatly discontented with its surroundings. 
Habitat.—A. marsh drain, Co. Wexford. 
