198 Memoirs of the Indian Museum. [Vol,. I, 



Pheretima andkrsoni, Michi,sn. 

 (Plate xiii, fig. 27.) 

 Ph. a., MlCHAElySEN, in Mt. Mus. Hamburg, xxiv, p. 166, f. 13. 



I examined two mature specimens which were rather weakened and stretched. 



External Characters. — Dimensions: I^ength ca. 250 mm., greatest thick- 

 ness 6 mm., number of segments ca. 120. 



Colour: On the anterior segments dorsally chestnut-coloured, on the other 

 parts of the body yellowish brown. 



Head epilobous (ca. \). Dorsalhinder appendix of the prostomium rather broad, 

 not closed behind. 



vSetas everywhere very minute. Circles of setae equally dense, continuous ventrally 

 and dorsally. Numbers of setse very great, according to a rough calculation about 

 100 on the loth segment. 



Dorsal pores seen onl3^ behind the clitellar region. 



Clitellum developed all round the body, occup^dng segments 14 — 16 (=3), 

 apparently without setae. 



Male pores in the zone of setae of the i8th segment about one- third of the 

 circumference of the body distant one from the other, on broad, only slightly prominent 

 papillae. The top of each papilla represents a broad, longitudinally oval area, 

 bordered by a delicate but well-marked furrow. The male pore lies in the centre of 

 this area. In one specimen the area shows before and behind the male pore a trans- 

 verse depression, in the other specimen the whole middle part of the area is somewhat 

 depressed. I counted twenty-six setae between the male pores. 



Female pores very near each other, if not united in the ventral median 

 line, in a ventral median depression of the 14th segment. 



Spermathecal pores four pairs in the intersegmental furrows 5-6 — 8-9, ventro- 

 lateral, distant one from another about two- fifths of the circum- 

 ference of the body, distinct, on small papillae, surrounded by curved 

 transverse rims. 



Copulatory organs in both specimens equally arranged and 

 formed: six great, very prominent, regularly transversely-oval glan- 

 dular cushions in the intersegmental furrows 19-20 — 24-25 in the ventral 

 median line. The distance between two neighbouring cushions is very 

 small, being restricted to the zone of setae of the intermediate segment. 

 The copulatory organs resemble a row of great buttons. 



Internal Anatomy.— Septum 4-5 tender, 5-6 hardly thickened, 

 6-7 and 7-8 strong, 8-9 and 9-10 totally missing, lo-ii and 11-12 very 

 strong, the following septa tender. 



Alimentary tract: A big gizzard between septa 7-8 and lo-ii. 

 (Ösophagus simple, without calciferous glands. Intestine with a pair ^°" 



of great, simple, slender, apparently quite smooth caeca which arise andZsmi. 

 from the intestine in the 26th (?) segment. 



