ART. 10 EARTHWORM FAUNA OF BURMA GATES 35 



The penial setae are 3-4 mm. long, 66-74, micra thick at the widest 

 region of the tip, 50-52 micra thick at the narrow region just behind 

 the tip, and 52-56 micra thick at the inner end. The shaft is nearly 

 straight except for a slight bend near the diamond-shaped enlargement 

 at the tip, and is ornamented by short sparsely distributed, toothed 

 ridges. 



The spermathecal ampulla is more or less heart shaped, two to 

 three times the length of the duct. An elongate diverticulum is 

 attached to the right and to the left sides of the base of the duct. 



The prostates extend through xvii-xxi or xviii-xxii, and are 18-24 

 mm. long. The duct is 1-2 mm. long. The vasa deferentia of a side 

 come into contact in xii but do not fuse until after they have passed 

 under the prostatic duct and turned inwards toward the nerve cord. 

 The fused duct is enlarged for two or three millimeters before passing 

 into the parietes. 



EUTYPHOEUS PLANATUS, new species 



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

 19258, U.S. N.M.).— Length, 120 mm. Diameter, 5-8 mm. Color: 

 Deep rich brown. Number of segments, 149. 



The prostomium is prolobous, large. 



On segments ii-xii, inclusive, there is a deep secondary furrow 

 posterior to the setae of the segment. On segments v-xii, inclusive, 

 there is a second deep furrow posterior to the setae of the seg- 

 ment. On vi-ix there is a slight tertiary furrow on the posterior 

 third of the segments. On viii-x there is a slight tertiary furrow on 

 the anterior third of the segments. Posterior to the clitellum there 

 are two slight secondary furrows on each segment, one anterior to 

 and one posterior to the setae of the segment. 



The first dorsal pore is in 11/12. There are pores in 12/13, 17/18, 

 and posteriorly. 



The setae are eight per segment, they begin on segment ii. 

 Anterior to the clitellum ah is less than cd, and aa is greater than 6c. 

 Posterior to the clitellum ah is less than cd and he is 2/3 to 3/4 aa, 

 dd is greater than one-half of the circumference. 



The clitellum begins just behind the setae of xiii and extends to 

 17/18. No dorsal pores or intersegmental furrows are present. 

 Setae are present in normal positions with the exception of a and h 

 on each side of xvii. 



The male apertures are conspicuous openings in the region he, at 

 the top of tubular porophores projecting from the bottom of the 

 depression in the body wall on xvii. 



The female pore is single, anterior to the setae, about halfway 

 between setal lines a and h, at the bottom of a slight concavity on 

 the left side of segment xiv. 



