1895.] NATURAL SCIENCES OF PHILADELPHIA. 343 



The terminal duct passes forward nearly to the septum and then 

 bends sharply backward to its external pore. 



Prominent transverse slit-like dorsal pores begin on the somite VII. 



These worms are slow and sluggish in movement, and rest most of 

 the time coiled up more or less tightly. They are very plentiful 

 in early spring about the lawns and meadows at Wayne, Delaware 

 County, Pennsylvania, where they are found most frequently coiled up 

 among the bulbous underground stems of garlic. Later during the 

 summer they become very scarce, apparently dying off, as almost none 

 could be found on digging to a depth of eighteen inches, and they 

 did not reappear even when the ground was soaked by prolonged 

 rains. 



A variety of this species has the terminal portion of the sper- 

 matheca for a short distance from the mouth glandularly thickened, 

 and one or two solid outgrowths alternating with the accessory sacs 

 (Plate XIII, Fig. 3.) 



Fridericia parva n. s. 



This is the smallest species that I have found. Its length is 

 12-15 mm., and the number of somites 46. 



Four setae constitute a bundle as far as the twenty-fifth somite, 

 behind which there are only two. 



The spermathecre (Plate XIII, fig. 10) are simple, the stalk being 

 about four times the length of the sacs, with glandular aggregations 

 at its base. There are no diverticula to the saccular region, which 

 is broadly pyriform, and attached to the stalk by its broad end, the 

 narrow end opening into the oesophagus. 



Salivary glands ( Plate XIII, fig. 9) simple and unbranched, with 

 a bulbous dilatation at the mouth. 



The dorsal vessel arises from the peri-enteric sinus in somite XVII. 



The supra-oesophageal ganglion is oblong ovate, about three- fifths 

 as broad as long, with its greatest width a little posterior to the 

 middle of its length, and the posterior border very slightly emargi- 

 nated. Ante-septal portion of nephridia about as long as principal 

 part of post- septal (minus the terminal duct) and about one-half 

 as thick. 



Funnel of vas deferens broadly ovoidal, with a constricted mouth; 

 duct much coiled and about 9—10 times the length of the funnel. 

 Prostate gland flattened globoid. 



