236 MR. F. E. BEDDAED ON NEW EAETHWOEMS. [Mar. 19, 



and of the male pores bear genital papillae. There are a pair on 

 each of segments x., xv., xviii., xix. behind the ventral pairs of 

 setae, a single median papilla on x., and one transversely elongate 

 papilla on xx., xxi. 



The male pores are very protuberant, and, as already mentioned, 

 are rather lateral in position. They are of course upon xvii. 



With regard to internal structui'es, I have had to be careful so 

 as not to unduly injure the single specimen at my disposal. The 

 gizzard is large and conspicuous, and appears to he in segments vi. 

 and vii. Behind this are seven septa, which are strengthened and 

 lie within each other like a series of cups. The last heart is in 

 segment xii. 



The racemose sperm-sacs are in segment xi. I believe that there 

 are only a single pair of testes and sperm-duct funnels in segment 

 X., but am not quite sure. 



The ovary (in xiii.) is remarkable for being a very perfectly flat 

 plate ending in a free tip as in Lumhrims, which projects beyond 

 any of the ripe ova. 



The spermiducal glands are massive and somewhat coiled ; they 

 end in a very short and narrow duct. There are penial setae 

 of considerable length (2-5 mm.), two in number in each bundle. 

 These end in a flattened expansion which has a membranous 

 appearance ; for some distance in front of this the seta is so regu- 

 larly marked and with such deep transverse striae, that it presents 

 quite the appearance of the flagellum of the antenna of a lobster. 

 It is simply an exaggeration of the striae generally to be found 

 upon the extremity of penial setae. 



The spermathecae are in ix. Each is a good-sized pouch 

 terminating in a duet, from which arises a single diverticulum of 

 much the same form as the pouch but smaller. 



Hah. St. 47, Corral. 



(7) Microscolex robustus, n. sp. 



This new species of Microscolex is represented by a single specimen 

 from Teja Isl., and three from Valdivia, Putabla. Tliis specimen 

 was unfortunately not fully mature, though the immaturity seemed 

 to concern the clitellum only. 



It is a moderately large species, less than M. gnseus or M. 

 spatulifer and about the size of M. cluhius. The coloration is on 

 the same plan as that of M. diversicolor ; it is not, however, so 

 brilliant as in that species. The area upon which the lateral setae 

 are implanted is, as in the last-mentioned species, white, while the 

 dorsal surface of the worm is purplish. The length of this 

 individual is 57 mm., the diameter 6 mm. ; number of segments 95. 



The prostomium is continued over the buccal segment by 

 grooves. 



The setae are paired anteriorly but not strictly ; the ventral 

 setae on segment xiii. are a little closer together than on the 

 preceding segments, this convergence continues until the xvith 

 segment ; they begin to diverge on the xviith segment, and by th^ 



