Eartlm-orms of the Vienna Museum. 131 



TIiG sj)ormatli('ca) arc two |)air.s and lie in .segments viif. 

 and ix. Kacli has a small diverticulum, pyriform in shapc^ 

 like the main pouch. 



(10) Perichseta vitiensis, sp. n. 



The collection contained a single specimen of a Penchvta 

 hearing the label '■'■ Ihipoga'on^ sp. aff. JJyP' orthostichoUy 

 Schm. Viti Ins." It measures 75 millim. and consists of 

 about seventy segments. The colour of the preserved speci- 

 men is a brownish yellow, grey upon the clitellum. The 

 seta3 are borne upon a very distinct ridge upon the middle of 

 each segment. The clitellum occupies segments xiv.-xvi., 

 ending a little way in front of the posterior border of the six- 

 teenth segment. There are no setai upon the clitellum. The 

 male pores are transversely elongated, somewhat curved, slits 

 lying upon two glandular-looking areas upon the eighteenth 

 segment ; between the two pores are about six sette. The 

 two pores are 3 millim. apart. The dorsal pores begin 

 between segments xi./xii. The spermathecal pores (one 

 pair) lie between segments vii./viii. on a line with the male 

 pores. The oviducal pore is single and median upon segment 

 xiv. 



The gizzard lies in segments ix., x., the septum dividing 

 those segments being absent. From the septum wliicli 

 bounds the gizzard anteriorly a number of raascular bands 

 are given off which are attached to the dorsal parietes. There 

 is only one very clearly defined septum in front of this one ; 

 behind the gizzard are four rather thickened septa. The 

 large intestine commences in the fifteenth segment, and there 

 are a pair of C93ea not quite in the usual position ; they appear 

 to belong to segment xxiv. The dorsal vessel is single, and 

 from about the thirtieth segment there are well-developed 

 septal glands arising from the posterior septum of the seg- 

 ments, and in many cases forming a continuous mass lying 

 above the dorsal vessel. 



The sperm-sacs are in segments xi., xii. ; each sperm-sac 

 sends up a narrow tubular process which approaches its fellow 

 in the middle dorsal line ; the arrangement in fact recalls that 

 found in Fen'ckccta Vaillanti^ where, however, the processes 

 become fused, thus forming an arch round the intestine. I 

 found one pair of testes in segment xi. attached to the front 

 wall of the segment. The funnels of the vasa deferentia, of 

 which there are also only a single pair, open in the neigh- 

 bourhood of the testes ; the septum dividing segments x./xi. 

 seems to be made up of two layers, between which the funnel 



