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. 11. 



The lorica is . 1 2 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^?i\\(S. Lepadella 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 Sqaamella 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 Sguamella. 



Length .08 mm. — .14 mm. Width (in the latter case) .12 mm. 

 Found several times in Minnesota. 



CxENUS 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 X, 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 



