444 Wisconsin Academy of Sciences, Arts, and Letters. . 
The right uncus has only one slender tooth following the ventral 
tooth, but is otherwise identical with the left. At the point of the 
right uncus there are three very small accessory teeth; the left 
uncus has four similar teeth, gradually decreasing in size. The 
manubria are nearly straight, with a broad, subsquare lamella at 
their anterior ends. A pair of slightly curved rods are imbedded 
in the walls of the mastax near the posterior edge of the rami and 
parallel with the dorsal branch; their function is to aid in keeping 
the cavity open during the pumping action. 
The oesophagus is long and slender. There is a slight constric¬ 
tion between the stomach and intestine. The gastric glands, ovary 
and bladder are normal. The foot glands are small and club- 
shaped ; they discharge into a minute, spherical mucus reservoir at 
the base of the toes. 
The ganglion is large and saccate. The retrocerebral sac is 
nearly spherical and the spaces between its vacuoles are crowded 
with bacteroids, giving it the appearance of being filled with small, 
black globules. The subcerebral glands are large and vacuolate, 
but ductless and fused with the ganglion. The eyespot is at the 
posterior end of the ganglion. 
Total length 225-250/^; toes 12-14/a; trophi 38/a. 
Notommata epaxia was collected at Oceanville, near Atlantic 
City, New Jersey, where it occasionally occurs in small numbers. 
It is closely related to N. aurita, but is readily distinguished by its 
much more slender form, the striation and the much smaller retro- 
cerebral sac, as well as the large mastax with its salivary glands. 
NOTOMMATA CODONELLA Harring and Myers, new species. 
Plate XXI, figures 6-10. 
The body is elongate, slender and spindle-shaped; its greatest 
width is less than one fourth of the total length. The integument 
is very flexible, but the outline remains quite constant. The en¬ 
tire body is very transparent. 
The transverse folds limiting the head and neck segments are 
well marked. The head segment is short and broad; the neck seg¬ 
ment increases very slightly in width towards the posterior end; 
its length is somewhat greater than the width. The abdomen con¬ 
tinues the outline of the neck segment and increases in width for 
about three fourths of its length; it is rounded posteriorly and 
ends in a very broad tail with a large, truncate median lobe and 
