io6 Records of the Indian Museum. [Vol. Ill, 



ChcBtogaster orientalis was found three times ; one tube contained 

 both this form and a Nats. 



It will be seen that the collection is of considerable interest, 

 in spite of the small number of species represented. One form 

 {Fridericia steward) I have ventured to name as new ; it is possible 

 that two others, the Nais and the Lininodrilus (?), are also new, 

 though I do not feel justified in giving them distinctive names. 

 Of the remaining two species, one, .Eolosoma hcmprichi, is already 

 well known to be widely distributed (Europe, North America, 

 Africa), and I have also found it at Lahore ; the other has so far 

 been met with only by myself in Lahore ; but since the name 

 which I gave to it had been previously appropriated, its present 

 s])ecific designation [Chcetogaster orientalis) makes its first appear- 

 ance here. 



The greater part of this investigation was carried out at the 

 Central Research Institute, Kasauli, during the summer vacation 

 of the present year (1908) ; and my best thanks are due to the 

 Director, Lieut-Col. vSemple, R.A.M.C. for kindly permitting me to 

 pursue my work there. 



Molosoma hemprichi , Ehrbg. 



No. 84. Gyantse, Tibet : 13,120 ft. ; 27-viii-07. 



Three specimens, of which the smallest appeared to be 

 the broken-off posterior end of one of the others. 



Length of both the larger specimens, including in each case 

 one bud posteriorly, '7 mm. ; diameter, 09 mm. Colour, a rather 

 dirty green ; the oil-drops in the skin (juite disappeared. These 

 latter are apparently incapable of preservation ; according to Capt. 

 Stewart's notes their colour was an orange-brown, nearer an 

 orange- red than a brown, and not unlike that of safranin stain. 

 vSegments, 8 or 9 distinguishable in the anterior or parent animal. 

 .Seta; commencing a short distance behind the mouth, i.e., in 

 segment ii ; all are fine hair-.se ttc, in both dorsal and ventral 

 bundles ; length varying, longer and shorter in the same bundle, 

 longest being about t mm. ; up to 5 in a bundle. 



Prostomium large ; both specimens having curled themselves 

 dorso-ventrally at the moment of fixation are seen in a lateral view 

 in the preparations, and the breadth of the prostomium does not 

 appear. According to a sketch of Capt. Stewart's from the living 

 worm, it was rounded, not pointed in front, and l)roader than the 

 following segments. The nerve-ganglion is shown as being deeply 

 indented posteriorly ; this also could not be made out in the 

 preserved specimens. The nephridia also are not recognizable. 



In all the anatomical characters that can be ascertained this 

 form agrees with Molosoma hemprichi , except that its length is con- 

 siderably less. The present specimens, probably somewhat con- 

 tracted, and perhaps also diminished by the loss of some posterior 

 buds, measure 7 mm. ; while M. hemprichi, according to Mich- 

 aclsen (" Oligochteta," in Tierreich, Berlin, 1900), has a length of 



