762 FRANK E. BEDDARD, 



The generative orgaas as usual serve to distinguish the species 

 from any other. The sperm-sacs are small and lie in segnients XI and 

 XII. The two vasa deferentia of each side join in the Xllth Seg- 

 ment; they then pass down tue body to the atria, which are as in 

 all other species of the genus, situated in the XVIIIth segment. 

 As in Terichceta nipponica the atria consist of the muscular tube 

 alone ; there was no indication of the glandulär appendage to be 

 Seen. That this is normally abseut in this species, as it certainly 

 is in Terichceta rokugo^ is rendered more than probable by the fact 

 the two specimens were identical in this particular; in neither 

 of them was there more of the atrium than a short and bent 

 muscular duct into the end of which opened the vas deferens. The 

 ovary is in segment XIII, and there is, as in PericJiceta sieholdi, 

 only a Single pair of egg-sacs; these are in the same segment 

 lying above the ovary of each side. The spermatothecse are very 

 small relatively to the size of the worm; they are a good deal 

 smaller for instance than in an example of Ferichceta toMoensis 

 which was actually a smaller worm. There are two pairs of them 

 with a Single diverticulum longer than the pouch; the spermatothecse 

 are in fact precisely similar in shape to the spermatothecaj of 

 Perich(jeta rokugo. In the neighbourhood of the spermatothecse open 

 a series of "capsulogenous" glands, which are symmetrically arranged 

 on either side of the body. There are four of these glands on 

 each side ; they are pear - shaped, as in some of the other species 

 described in the present paper. Two open in the neighbourhood of 

 each spermatotheca. 



Perichceta toMoensis n. sp. 



This species like Ferichceta nipponica is represented in the 

 collection by only a Single example. The worm measures 2^2 inches 

 in length by 6 mm diameter and is built up of 67 segments. 



The clitellum is, like all the other species described in this 

 communicatiou, devoid of seta3, und developed upon segments XIV — XVI 

 (inclusive). The male pores are conspicuous upon the XVIIIth 

 segment. Near to them, and to the inside, are two or three small 

 apertures with which correspond glands. The oviducal pore is Single 

 and median upon the XIVth segment. The spermatothecal pores are 

 between segments VI/VII, VII/VIII. They are in the same line with 

 the male pores, the pores of each side l)eing 5 mm apart. On the 



