174 Memoirs of the Indian Museum. [Voiv. I, 



being densely crowded with moderately large bladder-like outgrowths, some of which 

 partly overhang. In section it may be seen that these outgrowths are really hollow 

 inflations of the wall. The duct of the main pouch is very much shorter and thin- 

 ner than the ampulla, and is almost totally surrounded and covered by a diverticulum. 

 This diverticulum forms three-fourths of a ring wall, very thick in the middle and 

 tapering towards the ends, which embraces the duct of the main pouch. The surface 

 of the diverticulum is roughened by the projecting seminal chambers ; the whole diverti- 

 culum is like a conglomeration of numerous small, globular seminal chambers. 

 The sperm-masses in these seminal chambers give the whole organ a glittering, 

 metallic appearance. The diverticulum does not open into the duct of the main 

 pouch, but into the distal part of the ampulla. Occasionally one of these seminal 

 chambers may project somewhat more, being nearly free from the general conglom- 

 eration. 



Hab. — Western Himalayas , Dharmpur in the Simla district, ca. 5,000' ; 

 Dr. N. ANNANDALE leg., 6— 8-V-07. 



Remarks. — lyike P. sikkimensis and others this species comes near the genus 

 Perionyx. It may perhaps seem justifiable to transfer it to the latter genus. 



GEN. PERIONYX. 

 Perionyx sansibaricus, Michi^sn. 



p. s., MICHAELSEN, in Mt. Mus. Hamburg, îx i, p. 4, t. i, f. i. 



P. s., MICHAElySEN, in Sb. böhm. Ges. Prag., 1903, xl, p. 8, text-f. E. 



Hab. — South India, Kodaikanal in the Palni Hills, 7,000'; Dr. J. R. 

 HENDERSON leg. 



Remarks. —When I first saw a species of Perionyx with alternately placed 

 nephridial pores in the collection from the Palni Hills, I did not doubt that it was a 

 specimen of BOURNE's P. saltans formerly found in the vicinity of the Nilgiri Hills. 

 A closer examination, however, proved that the specimen before me belonged to my own 

 species P. sansibaricus , first described from a unique specimen from Zanzibar. The 

 greater extension of the clitellum at segments 13 — 17 (=5), and the sperma- 

 thecae being throughout provided with a single knob- or stump-like diverticulum, were 

 characters in which the specimens differed from P. saltans and agreed with P. san-' 

 sibaricus. This species, therefore, must be regarded as a peregrine one, an opinion 

 that I published formerly, putting in question the identity of this species with P. 

 saltans.^ Zanzibar, then, does not belong to the original region of the genus 

 Perionyx. 



As to the organisation of P. sansibaricus I may add the following remarks : — 



External Characters.— Dimensions : The present three specimens are 32—45 

 mm. long (type specimen 63 mm. long) and about 3|- mm. thick. Number of 

 segments 84 — 94 (type specimen 108). 



' W. MICHAElySEN, Die geographische Verbreitung der Oligochœten , Berlin, 1903, p. 89. 



