1892,] Zoology. 707 
‘ Millimeters, 
Length bonis ue pr he i 25.00 
Length of anterior division or enn ak eae AN 
Length of median division, body aipe . ; 17.30 
Length of posterior division : ‘ : 5.50 
Diameter, median Š : i é à 0.90 
Diameter, anterior end á : ; 0.42 
Diameter, 1mm. from kiteia nid > ‘ : 0.32 
Diameter of bursa i ; ; à " i 0.36 
Length of spicule ‘ : ‘ : ` ; 0.42 
Diameter of spicule, apex. i i i ‘ 0.01 
Diameter of spicule, middle ‘ é ‘ i 0.015 
Diameter of spicule, base . : 0.04 
The anterior division of the body or sie passes yy rather abrupt 
enlargement into the body proper. The diameter of the œsophagus at 
base is 0.18 mm; and the breadth of the intestine at its anterior end is 
0.3 mm. 
The posterior, transversely-wrinkled portion may, possibly, be retrac- 
tile, although the appearance is against this supposition. 
The single specimen, upon which this description is based, is in the 
possession of Mr. Wm. B. Marshall, State Museum, Albany, N. Y. 
EXPLANATION OF FIGURES. 
== 
pæ > 
Q 
p 
Specimen, head missing, x 6. a, neck; b, body; ¢, posterior 
region of body separated from bady proper by a constriction ; 
p, esophagus ; í, intestine; t, reproductive tube. 
Fig. 2. Bursa and spicule, x 75. 
Fig. 3. Bursa, optical section, x 150, a, anal aperture; d, denticulate 
rim; sp, spicule; vd, termination of reproductive tube. 
Fig. 4. Portions of spicule, x 200, a, apical, and b, basal portions, 
Fig. 5. Polygonal cells in wall of dark-brown portion of intestine, x ` 
about 150. Epwiy Linton, Px. D. 
Washington and Jefferson College. 
Washington, Pa., June 1, 1892, 
