172 Memoirs of the Indian Museum. [Voi,. I, 



the distal end which has a moderately sharp, simple tip. The distal part of the 

 seta is ornamented with irregular, sometimes oblique, transverse rows of small 

 triangular teeth. 



Spermathecse (fig. 13) with an oblong, nearly cylindrical ampulla and a some- 

 what shorter and thinner, but externally not abruptly set off duct, without any trace 

 of diverticula, not even hidden in the interior of the wall. The ampulla is smooth ex- 

 ternally, but with irregular folds on the interior surface of its wall. 



Hab. —Eastern Himalayas, Sandakphu in the Darjiling district (British 



Sikkim), 11,900'; C. J. BBRGTHEIIv and 

 I. H. BURKIIvIv leg. 

 ? ,, ,, Subarkum in the Darjiling district (British 



Sikkim), 11,600'; C. J. BERGTHEII. and 

 I. H. BURKII.Iv leg. 

 ? ,, ,, Kurseong in the Darjiling district; Dr. N. 



ANNANDAIvEleg., 21—29- v-o6. 

 Remarks. -Perionychella sikkimensis comes near to the genus Perionyx, not only 

 in the external appearance, but also in more important features, viz., in the smallness 

 of the gizzard and in the approximation of the male pores and the spermathecal 

 pores towards the median ventral line. In certain points it resembles Perionychella 

 m'intoshi (BEDD.) {—Perionyx m'intoshi, BEDD.). It is distinguished from the 

 latter by its smaller size, by the lesser extension of its clitellum and by the posi- 

 tion of its spermathecal pores. 



Perionychei,i.a simi^aënsis, MiChi^sn. 

 (Plate xiii, figs. 14, 15.) 



P. s., MiCHAEIvSBN, in Mt. Mus. Hamburg, xxiv, p. 157. 



Present six mature specimens and some young ones. 



External Characters. — Dimensions of the mature specimens : I^ength 85 — 

 100 mm., greatest thickness 4 — 5 tnm., number of segments about 128, all nearly 

 alike. 



Colour violet-red dorsally, at the anterior part of the body darker, — nearly dark 

 blue- violet ; ventrally grey with exception of some of the most anterior segments, at 

 which the violet pigmentation surrounds the whole body but is rather lighter ventrally. 



Head epilobous (f). Hinder appendix of prostomium open behind. 



Setse moderately small. Circles of setae complete ventrally, nearly complete 

 dorsally, here at least not distinctly interrupted, ventrally much denser than dorsally. 

 Number of setae 45-v, 46-viii, 52-xii, 45-xix, 45-xxvi. \ 



First dorsal pore in the intersegmental furrow 4-5. \ 



Clitellum occupying the segments 13 — 17 (=5), ring-shaped, interrupted only 

 ventrally at the 13th segment by a trapezoidal median interspace, which is narrower 

 behind and here joins the circular non-glandular area of the female pore. Setse and 

 intersegmental furrows quite distinct in the whole clitellar region. 



