1900.] EABTHWORMS OF THE " SKEAT EXPEDITION." 893 



to this species. I am able in a few small points to supplement 

 Dr. Eosa's account. I find, for example, that in both specimens 

 there are more setae upon the clitellum than he found, i. e. 6 or so 

 upon the last two segments. The figure given by Eosa (loc. cit. 

 tav. i. fig. 14) of the very remarkable arrangement of the genital 

 papillae entirely bears out and admirably illustrates the appearances 

 detected by myself. This being so, I was surprised to find on 

 opening one of the two specimens not a trace of the caeca which 

 Eosa has very emphatically stated to be present. To make certain 

 about this point, which is of some systematic importance, 1 dis- 

 sected the second specimen, in which I also failed to find these 

 appendages. 



The gizzard of this worm is rather remarkable in shape ; it is 

 wide from side and short in antero-posterior diameter ; it is 

 constricted in the middle, and presents somewhat the appearance 

 of a doctors hat viewed, of course, from the side. 



In other points, including size, my specimen seems to agree 

 with that described by Dr. Eosa. The spermathecae, however, 

 happen to be more globular, no doubt a question of a different 

 degree of disteosion with sperm, while the diverticula are a little 

 less conspicuous in length than they are figured by Dr. Eosa. 



Hob. Biserat. 



(5) Amyntas malayanus, n. sp. (Pig. 1, p. 894.) 



Of this species I have been able to examine a number of 

 examples. The individual selected for measurement was 144 mm. 

 in length and consisted of 105 segments. 



The setce on the anterior segments show no differences in size 

 from those of the posterior segments. They are present on all 

 the segments of the clitellum. 



The clitellum occupies the usual segments, but it does not begin 

 or end sharply. 



The genital papilla are highly characteristic. There are four 

 pairs of these in all, which lie upon the xviiith to the xxist 

 segments. The first pair lie behind and to the inside of the male 

 pores ; the remaining pairs are in line with them upon successive 

 segments. The papillae, as shown in the accompanying figure 

 (fig. 1), are small, considerably smaller than the male pores, to 

 which, however, they have a general resemblance in appearance. 

 They are slightly projecting and surrounded by a circular 

 wrinkle of the integument. There are no papillae upon the 

 anterior segments. 



The male pores are conspicuous and widely separated. Each is 

 surrounded by several circular wrinkles of the integument. Erom 

 the tip of each porophore, which is somewhat raised, protrudes a 

 slight conical process, which can be regarded as a penis. 



As to internal structure it is noticeable that the septum separating 

 segments viii./ix., which is so often absent in Amyntas, is present 

 in A. malayanus though rather thin. 



The intestine begins in the xvith segment, and thecaca are present, 



