760 FRANK E. BEDDARD, 



within narrow limits, for each species of Perichceia when sexually 

 raature, it may be that my specimen is really a distinct species. 

 Nevertheless I cannot gather from the descriptions of either Dr. Horst 

 or Dr. Rosa that there are any poiiits of structure in which these 

 forms ditter. I may add to the accounts given by these two authors 

 a few facts not referred to by either of them. 



The clitellum has no setae upou any of its three Segments. 

 'J'his character appears to be found in all the Japanese Perich<Eta: 



There is a Single pair of egg-sacs (receptaculum ovorum) lying, 

 not in the XIVth segment, but in the Xlllth. The egg-sacs are of 

 considerable size as compared with those of Lumbricus for example. 

 They are attached to the front wall of their segment, above the 

 ovaries. It is very usual for Ferichcßtida- to have two pairs of 

 these sacs ; in such cases they occupy segments XIII and XIV. It is 

 very remarkable to find that when one pair only is present they should 

 be those of segment XIII, 



Ferichieta nipponica n. sp. 



Of this new species I have only a Single specimen. It is a 

 slender worm, measuring about 4 inches in length by 4 mm in diameter 

 at the head end, and consists of about 100 segments. 



The clitellum has no seüi^ ; elsewhere they form continuous rings, 

 which, in the case of the anterior and posterior segments, are borne 

 upon distinct ridges. The genital apertures are all very distinct; the 

 male pores are upon the XVIIIth segment, and are separated by 

 14 setcL'. The oviducal pore is on segment XIV. The spermatothecal 

 pores are between segments V VI, VI VII, VII VIII and VIII IX. On 

 segments VII, VIII and IX are a pair (to each segment) of copulatory 

 papilhe, in front of the line of setii% and to the inside of the sper- 

 matothecal pores. Upon these open whitish glands. 



There are three distinct septa in front of the gizzard, of which 

 tlie two iirst are covered on their anterior faces with dense nephridial 

 tufts. The first 4 or 5 septa after the gizzard are stronger than 

 those which follow. The alimentary canal has the usual characters 

 of the genus; the gizzard lies in segments VIII and IX; the septa 

 dividing these segments are absent, and there is no septum between 

 IX, X. 'i'he Oesophagus is thickwalled, and of a yellowish colour; it 

 exteudö back as far as the end of segment XV. There are no specialized 



