KONGL. SVENSKA VET. AKADEMIENS HANDLINGAR. BAND. 15. N:0 7. 



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Lumbricus terrestris 



» purpureus 



» rubellus ..- 



Allolobophora turgida 



» raucosa 



» norvegioa 



» riparia 



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» foetida . 

 » Nordenskiöldi 

 » subrubicunda. 



Dendrobaena Boeckii.. 



Allurus tetraedrus 



Fam. 2. LUMBRICULID^ Vejd. 

 ? Lumbriculus Grube. 



? Lumbriculus variegatus Grube 1844. 



Syn.: 1844. Lumbriculus variegatus Grube, Wiegm. Arch. t. lu. p. 207. 

 1862 L ) ? Claparede, Recherches Anat. s. les Oligochétes p. 39. 



The number of segments is from 50 to 160. The receptacles for the sperma- 

 tozoa are longer and narrower than those figured by Claparede, but their shape may 

 perhaps be varying with the age or the development of the animal, see Pl. VII. fig. 13 b. 

 Besides the organs of generation I also found four pairs of peculiar glands in the seg- 

 ments 8, 9, 10 and 11. of very much the same shape and size as the receptacles, all 

 opening on the sides of the segments, near the segmental organs, PL VII. fig. 13 c 

 and e, but the want of a sufficient number of specimens for dissection prevented me 

 from further investigating their nature. The identity of the species is yet to be doubted. 

 Fig. 13 a on the same plate represents the supra-cesophagial ganglion seen from above, 

 and Fig. 13 d one of the spines highly magnified. 



Habitat. Several specimens of this worm were collected on the following loca- 

 lities: lat. 72° 17', Jahn al; lat. 71° 55', Schaitanskoj and lat. 68° 35', Lusino-Jenissej. 



l ) In a recent letter my friend Mr. Franz Vejdovsky informs me tbat Clapauéde's Lumbriculus is not 

 synonymous with Grube's worm of the same name 



K. Sv. Vet. Akad. Handl. Bd. 15. N:o 7. 



