CHINESE EARTHWORMS — GATES 407 



The nephridiopores of viii-xiii may or may not be displaced rather 

 markedly dorsal to d. 



The clitellar coloration (pinkish) extends across segments x-xiv 

 and onto the posterior portion of ix. 



The spermathecal pores are transverse slits on 7/8 just median to c, 

 the anterior margin of the pore swollen so that the pore appears to be 

 slightly behind 7/8. The female pores are minute, dark, grayish spots 

 in slight, transverse, slitlike depressions on the anterior margin of xii, 

 the slits in ah. 



The apertures of the penial chambers are on 10/11 in Ic^ slightly 

 nearer to h than to c. The true male pore is much smaller and at the 

 ventral end of a penis, which may be completely withdrawn into the 

 penial chamber (invisible from the exterior) or slightly protuberant 

 through the chamber aperture. 



On one specimen there is a pair of small presetal genital markings 

 on X. Each of these markings is circular in outline, slightly elevated, 

 about equal in width to interval «&, the median margin of the marking 

 about in line h. The margin of the marking is opaque, the center of the 

 marking of a gi-ayish translucence. The clitellar coloration is lacking 

 on a ventral region that includes the genital markings and extends 

 across the anterior portion of x and the posterior portion of ix. On 

 the second specimen a rather vague protuberance somewhat resembling 

 the genital markings just described can be seen anteriorly on viii, in db. 

 The whitened ventral region is lacking on this worm. 



Internal anatomy. — The gizzards are three, in xii-xiv (2 specimens). 

 There are paired enterosegmental organs in several successive segments, 

 beginning from xvi. There is a band of opaque whitish material on 

 each side of the dorsal blood vessel. The last pair of hearts is in ix. 



The testis sacs are kidney-shaped, the concave side directed ven- 

 trally ; in ix and x, unconstricted by 9/10. The vas deferens is rather 

 short and is twisted into two bunches of loops, the smaller on the 

 anterior face of 9/10, the larger on the posterior face, the total mass 

 of the two bunches of loops very much less than that of the testis sac 

 above. The prostates are 6-7 mm in length. The middle portion is 

 bent into a sort of C-shape and is placed around the penial chamber 

 so that the open side of the C faces mesially. An ental portion is 

 almost straight and pushes through 9/10 (at least in one specimen) 

 into ix. An ectal portion of the prostate is bent under the posterior 

 limb of the C and appears to pass into the lateral face of the penial 

 chamber, close to the parietes. The granulations (external glandular 

 layer) on the prostate extend to this apparent point of entrance into 

 the penial chamber. Removal of a layer of connective tissue from the 

 coelomic face of the chamber reveals a very slender, smooth, and 

 glistening prostatic duct, which passes upward and into the chamber 



