286 Dr. D. Rosa on some 



Two pairs of sperm athecal pores are visible on small 

 papillae between segments 6-7 and 7-8, in line with setae 8-9. 



The first dorsal pore is between segments 12 and 13. 



There are no copulatory papilla?. 



Septa 5-6, 6-7, 7-8 are rather thickened; the four septa 

 10-11 to 13-14 are also somewhat thickened; septa 8-9 

 and 9-10 are wanting. 



A greater number of strong muscular bands start from the 

 pharyngeal bulb intersecting the septa and connecting the 

 bulb with the body-walls, some of them reaching as far 

 back as somite x. Another set of similar bands are given off 

 from the hinder portion of the gizzard and are attached to 

 the parietes of segments xi. and xii. 



A dense network of blood-glands covers the anterior side of 

 septa 5-6 and 6-7. 



The gizzard is bell-shaped and extends from septum 7-8 

 for almost the entire length of the three segments viii., i.w, 

 and x. The large intestine commences in segment xvi. ; in 

 somite xxvi. it gives off one pair of caeca, which are simple 

 sacs extending forward through segments xxv. and xxiv. 



The last hearts lie in segments xi., xii., and xiii. 



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

 sac is provided at its free end with a lobulate appendage, 

 which in our specimen had a spongy appearance and was 

 filled with gregarines (pseudonaviculae). 



The prostates are comprised between septa 17-18 and 

 18-19; their length is, however, equal to three segments, so 

 that the septa are much swollen. These prostates consist of 

 two principal and many secondary lobes, which are com- 

 pressed -together, so that the general outline (nearly penta- 

 gonal, with rounded corners) is almost continuous. The 

 ejaculatory duct, which is rather short and slightly sigmoid, 

 ends in a round muscular bnlb, which is usually hidden by 

 the prostate, as is also the duct itself. 



The spermathecoe are two pairs in segments 7 and 8 ; they 

 are much developed and consist of an oval pouch with a duct 

 nearly half its length; their diverticulum consists of a 

 proximal dilated portion, of an intermediary tract, which 

 is narrow and contorted, and of a swollen distal portion. The 

 diverticulum is partially hidden by the nephridial tufts which 

 cover the duct of the spermathecae. 



Perichceta Belli, sp. n. (PI. IX. figs. 14, 15.) 

 Log. Mindoro, 5000 feet. 



The only specimen I have seen of this species measures 

 75 x 5 millim. ; its segments are 100 in number; the 



