30 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Distribution. — Meiktila. 



Remarks. — The length varies from 110-130 mm., the diameter from 

 3-4 mm., at the posterior end to 6-7 mm. at the anterior end. In a 

 few specimens the first dorsal pore is large and located in 11/12. 



The prostates are 21-25 mm. long, the duct is 2-4 mm. long. The 

 spermathecal diverticula have a wide variety of shapes. In one 

 specimen the diverticulum on one side of the duct may be elongate 

 and finger shaped, while the diverticulum on the other side of the 

 duct is club shaped with numerous small nodules on the end. 



The penial setae are 1.5-1.8 mm. long; 48-52 micra thick at the 

 widest portion of the base, and 48-65 micra thick at the widest region 

 near the tip. The shaft is straight except for a single bend near the 

 tip. Near the free end of the seta there are two or three distinct, 

 transverse constrictions or grooves completely continuous around the 

 shaft. The first 0.5-0.7 mm. of the tip end of the seta is ornamented 

 with short rows of teeth. The rows are quite regularly and fairly 

 closely spaced. 



EUTYPHOEUS EXCAVATUS, new species 



Description of the type-specimen, external characteristics (Cat. No. 

 19260,U.S.N.M.).— Length, 274 mm. Diameter, 6-10 mm. Num- 

 ber of segments, about 254. 



Color: Deep rich brown. The prostomium is prolobous, large. 



On segments ii-xii there is a deep secondary furrow posterior to 

 the setae of the segment. On iv-xii there is a deep secondary furrow 

 anterior to the setae of the segment. Tertiary furrows are present 

 as follows: vi, one on the posterior third; vii, one on the posterior 

 third; viii, two on the posterior third; ix, one on the anterior third 

 and two on the posterior third; x, one on the anterior third and one 

 on the posterior third; xi and xii, one on the posterior third. On xiii 

 there is one furrow anterior to the setae. Behind the clitellum nearly 

 every segment has two deep secondary furrows, one anterior and one 

 posterior to the setae. Many of the segments have a tertiary furrow 

 on the anterior and posterior thirds formed by the secondary furrows. 



The first dorsal pore is in 11/12. Pores are present in 12/13, 17/18, 

 and posteriorly. 



There are eight setae and they begin on segment ii. Posterior to 

 the clitellum ah and cd are about equal, he is less than aa, dd is 

 greater than one-half of the circumference. 



The clitellum extends from the secondary furrow anterior to the 

 setae of xiii to 17/18 (about 43^). Intersegmental furrows and dorsal 

 pores are lacking. The clitellum is interrupted ventrally by the 

 genital markings and the depression on xvii. 



