49 



second paper on M. barwelli shows that his first statements about 

 this species ! ) are not quite correct, and therefore Rosa's suggestion that 

 M. beddardii should be distinguished from M. barwelli , by having only 

 three gizzards and the funnels of its spermducts lying free into the 

 vesiculae séminales, cannot be maintained. 



Our specimen however differs from both species in the structure 

 of its female genital organs. Though Rosa observed the ovaries in 

 M. beddardii, neither he nor Beddakd mentions the presence of the 

 large egg-sacs, which in our specimen appear to be no less developed 

 than those in M. Houtenii and M. minutus. 



Desmogaster Rosa. 

 7. Desmogaster sp. 



Sumatra: mount Singalang. 



Among the earthworms, collected in Sumatra, I met with a spe- 

 cimen , in which there was neither any trace of a clitellum , nor of an 

 external orifice visible; I therefore presumed it to be an immature 

 individual of any known species. On opening it from the dorsal side 

 however I recognized, that it probably belongs to the genus Desmo- 

 gaster, only recently described by Rosa on specimens, collected in 

 the village of Metelèo in Burmah. Desmogaster doriae, though agreeing 

 in many respects with Monilig aster , is specially distinguished by ha- 

 ving two pairs of male genital glands, and two pairs of vasa 

 deferentia, furnished with large prostata-glands and opening by four 

 distinct pores in the intersegmental groove XI/XII and XII/XIII. I 

 regret that I could not recognize thoroughly the internal organisation 

 of this worm , as the specimen was rather small and much contracted, 

 and I did not like to spoil it too much. 



The worm measures about 140 mm.; it has nearly 300 segments, 

 but those behind the 126th. are regenerated. The body is cylindrical 

 over its total length; its colour of the dorsal side is violet, at the 

 ventral side whitish. No clitellum is visible. The cephalic lobe 

 is not embedded in the buccal segment. The two anterior segments 

 have their longitudinal diameter smaller than that of the succeeding 

 ones; the 10th segment is the largest one. The setae are minute, 

 arranged in four pairs; the distance between the dorsal and ventral 

 couple measures the half of that between both ventral pairs. 



2) Annals and Magazine of Natural history, 1886, p. 94. 



