1898.] FEOil BRITISH INDIA. 447 



The intestine begins in segment xv. in the ordinary way, but it 

 narrows again in xvii., xviii., and xix., and then increases to its 

 full size in xx. This is possibly due to the size of the spermiducal 

 glands, and to the existence of a group of little white glands, which 

 would limit the space left for the intestine. 



There are large sperm-sacs in segments xi. and xii,, the foremost 

 pair of which extend into segment x. yentrally. 



The spermiducal glands lie in segments xviii. (or xvii.)-xx. 

 They have no muscular sacs, and have a straight duct. The 

 lobulation is not at all deep. As before mentioned, each side has 

 a group or little white glands evidently connected with the 

 papillae. 



The two pairs of spermathecce are in segments vi. and vii. The 

 pouch is an oval sac, with a duct of about the same length — shorter 

 in the specimen with median papillae in this region. The diverti- 

 culum is swollen at its extremity, and is the length of the duct 

 and pouch together. 



This worm comes very close to P. barhadensis \ but the papillse 

 at the male pores are most distinctly different. It also approaches 

 P. amazonica ^, but that worm has no clitellar setae. 



Peeich.5;ta crescentica, sp. nov. 



Out of the nineteen specimens of this species in the collection 

 only one is mature. 



External Characters. 



Length 80 mm. ; breadth 4 mm. ; number of segments 101. 



The clitellum takes in the whole of segments xiv.-xvi. It bears 

 three rows of setae equal in number to those on the other adjoining 

 segments. These setse are not in any way modified as in 

 P. houlleti ^. They are precisely similar in form to those on the 

 ordinary segments. 



The male pores are separated by about 12 setse. There are no 

 papillae at all, but the pores are tumid. The aperture itself is 

 crescentic, with the horns turned outward ; while its margins are 

 crenated, suggestive that the muscular sac within is more or less 

 eversible (cf. P. cnpensis) *. 



Internal Features. 



The gizzard, which is bell-shaped, occupies the viiith and ixth 

 segments. 



The intestine, as usual, begins in segment xv., and bears cceca 

 which originate at the anterior part of segment xxvii. and reach 

 forward to segment xxiv. 



There are septal glands, which very much increase in size behind 

 the caeca. 



' Beddard, P. Z. S. 1892, p. 167. 

 2 Eosa, Atti R. Accad. Sci. Torino, 1894, p. 14. 

 ^ Perrier, jSfouv. Arch. Mus. 1872, p. 99. 

 * Horst, Zool, Ergebn. Ost-Indien, p. 62. : 



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