2 PROCEEDINGS OF THE NATIO^STAL MUSEUM vol.73 



small elements. The first part of the esophagus consists of a broad 

 anterior portion and a narrow posterior portion the latter gradually 

 widening out to form the posterior part of the esophagus. The nerve 

 ring is located approximately at the beginning of the second third 

 of the esophagus in the region of the constricted portion of that 

 organ. The cervical papillae are located slightly posterior to the 

 middle of the esophagus. The lining of the walls of the esophageal 

 funnel is modified to form six toothlike structures, triangular in 

 shape with apex directed forwards. 



Male. — The male is from about 8.5 to 10 mm. long by from 370 

 to slightly over 400/x in maximum width and from about 185yu. to 200/« 

 wide just anterior to the bursa, in the region of the pre-bursal papil- 

 lae. The head is from 117/x to 125/x in maximum diameter. The 

 maximum width of the buccal capsule is about 100,u. The esophagus 

 is from 756ju, to 840jm. long by 202/x in maximum width and 84/i in 

 minimum width. The nerve ring is located at a distance of about 

 270/x from the anterior extremity of the esophagus, and the cervical 

 papillae are located approximately in the middle region of the 

 esophagus. The ventro- ventral and latero- ventral rays (fig. 6) have 

 a horizontal direction and extend to the margin of the lateral lobes 

 of the bursa. The medio-lateral and postero-lateral rays extend 

 close to the margin of the bursa, whereas the externo-lateral I'ay 

 which diverges from the former terminates at some distance from the 

 margin of the bursa. The externo-dorsal ray arises at a distance 

 of from 220/x to 250jii from the tips of the terminal branches of the 

 ■dorsal ray. The undivided portion of the dorsal ray has a pair 

 of accessory branches located at a distance of about 50/x from the 

 point at which this ray becomes cleft; the accessory branches arise 

 symmetrically (fig. 2) or asymmetrically (fig. 5) from the stem of 

 the dorsal ray which is cleft on its posterior third, the diverging 

 terminal branches being about 85jii long. Each terminal branch of 

 the dorsal ray has a small accessory branch which may be rudi- 

 mentary (fig. 5) and is located at a distance of about 33/x from the 

 tip. The spicules (fig. 3) are slender, alate, from 672,a to 840jw 

 long, and terminate in knoblike tips. The gubernaculum is more 

 or less pear-shaped, from 63ju, to 67^*. long by about 21ju, in maximum 

 width. 



Female. — The female is from 9 to 9.5 mm. long by 470/^ to 487/* 

 wide. The maximum diameter of the head is 134/*. Diameter of 

 buccal capsule same as in male. The esophagus is from about 873/i 

 to 923/x long by 235/i to 319/^ in maximum width. In one specimen the 

 nerve ring is located at a distance of about 285/i from the anterior 

 extremity of the esophagus, being somewhat posterior to the begin- 

 ning of the second third of that organ. In the same specimen the 

 cervical papillae are located at a distance of 436/t from the anterior 



