132 Mr. F. E. Beddard on the 



lies ; but as tlie specimen is a unique one, I am not able to 

 settle the position of the funnel quite definitely, as it would 

 te probably necessary to cut sections. The main fact, how- 

 ever, to ■which attention is called is the occurrence of only one 

 pair of testes and one pair of funnels. I believe that in all 

 Perichceioi Iiitherto described there are two pairs. 



The atria are very compact and lie in segments xvii.-xix. : 

 the horseshoe-shaped duct, which arises from the middle of 

 the gland, is at first tolerably wide ; just before the external 

 opening it becomes exceedingly narrow and opens through a 

 small globular sac on to the exterior. 



The ovaries are in the thirteenth segment. The single 

 pair of spermathecae lie in the eighth segment ; each has a 

 single diverticulum, of a chalky-white colour owing to the 

 contained sperm. 



The only species of Perichceta with one pair of spermathecse 

 are Feridicita elongata, P. quadragenaria^ and P. sangirensis '^ 

 but P. vitiensis differs from all of these in the possession of 

 but a single pair of testes and vas deferens funnels. Is it 

 identical with Grube's P. suhquadrangitlus, which also comes 

 from Viti ? In this case, as with most of Grube's species, it 

 is impossible to distinguish the species from his data. 



(11) Acantliodrilus Schmardae. 



The single specimen of this species was found in fresh 

 water at Rockhampton (? in Queensland). 



It measures about 60 millim. in length by 5 millim. in 

 breadth. The clitcllum occupies segments xii.-xvii., and is 

 undeveloped ventrally ; the grooves between the clitellar 

 segments are very evident ; dorsal pores are present, but I 

 could not ascertain where they commenced. Segments iii.-x. 

 are annulate, the middle segments showing three annuli. 

 On segments xvii. and xix. are the atrial pores, of which the 

 anterior marks the ventral edge of the clitellum, and between 

 segments viii /ix. a pair of spermathecal pores. 



The "worm being much contracted and the internal organs 

 softened I am not able to say so much as I could wish about 

 the anatomy of the worm. The notes that I am able to give, 

 however, are quite sufficient to distinguish the species. The 

 dorsal vessel is single ; the nephridia are paired structures. 

 A gizzard is present, but 1 am not certain which segment it 

 occupies ; after the gizzard come five thick mesenteries. 



Ihe only organs of which 1 am able to give an adequate 

 account, and they are fortunately the most important, are the 

 spcrmathccie and the atria. 



