54 
BULLETIN OF THE LABORATORIES 
are . 13 long and slender, the terminal third being attenuated. The 
ganglion is small and bears a single red eye. The trochal disc is 
retracted by four powerful muscular bands. The stomach is globular 
and glandular.. The short segment of the foot is moved by pairs of 
evident muscles. This species was but once seen in July. 
Distyla ohioensis, sp. n. 
The lorica is .12 mm. long and its form is much as in the previous 
species. Width of lorica .084 mm., length of claws .028 mm. The 
sides of the lorica project in front to form a tooth on either side of the 
head. The lorica is sculptured into regular areas upon the first seg- 
ment. There is a quadrate plate projecting over the base of the 
claws. The latter are attenuated toward the end. The details of struc- 
ture are not known. 
GENUS SQUAMELLA, Ehr. 
The three genera Squaniella, Metopidia,‘3a\6. Lcpadella agree closely together, be- 
ing characterized by the presence of four, two, or no eyes respectively. The or- 
ganization is much as in Euchlanis. The lorica consists of an oval, arching, scale - 
like shield above, and a flattened plate below. The foot consists of three short 
joints terminating in two acute claws The head terminates above in an oval scale- 
like appendage. 
They only species belonging to this group as yet seen was hastily 
identified with Squamella bractea and, in absence of further informa- 
tion, we will simply give measurements in addition to the figure, in 
which, by the way, but one pair of eyes is represented, leaving us to 
infer that the animal is Metopidia rather than Squamella. 
Length .08 mm. — .14 mm. Width (in the latter case) .12 mm. 
Found several times in Minnesota. 
GENUS STEPHANOPS, Ehr. 
The lorica is depressed, and frequently extends into spines posteriorly Head 
covered with a shield, which, when viewed from before or behind, is in shape like 
a halo There are two eyes, occupying the extreme sides of the head. The 
foot is three -jointed and ends in two lanceolate claws, between which springs an 
awl-shaped spine. 
Stephanops muticus, Ehr . 
{Plate Af, Fig. 9 .) 
A specimen of this species was taken in July, I885. The lorica • 
is oblong oval, seeming two-jointed behind. There is a slight crest 
