DESCRIPTIONS OF EARTHWORMS. 297 



On Lumbricus terrestris var. stagnalis (Hofifm.) Oerley. 



Oil paoje 583 of his Fauna above referred to , Mr. Oerley 

 mentions L. terrestris var. stagnalis HofFra. Of this variety 

 I found four individuals in the collection, presented to our 

 Museum by the Hungarian naturalist. In examining these 

 earthworms I observed, that like the foregoing specimens 

 they cannot be assigned to L. terrestris , but that in their 

 external characters they show more resemblance to Alloh. 

 complanata. 



The largest of our specimens has a length of 88 m.m., 

 the number of its segments being about 125. The cephalic 

 lobe impinges into the buccal ring only to the half of its 

 length. The segments 1 — 14. have a longitudinal diameter 

 about twice as large as that of the following segments. 

 The clitellum consists of 8 to 9 segments , extending from 

 the 29th (30th) to the 37th (38th) ring. The first dorsal 

 pore is situated between segment 6 and 7. The openings 

 of the segmental organs lie somewhat outward from the 

 series of the external setae of the ventral pair. The setae 

 are arranged in eight series , being separated from each 

 other by a rather broad space; the superior lateral inter- 

 val is as large as the inferior one , on the contrary the 

 medial lateral interval is somewhat larger and measures 

 two thirds of the ventral one. 



In dissecting one of these worms from the dorsal side, I was 

 no less surprized to find it presenting 5 pairs of copulatory 

 pouches, situated in segment 6, 7, 8, 10 and 11 ; the three 

 anterior pairs of them lie in front of the posterior wall of 

 their segments, while those of the 10th and 11th ring are 

 situated behind the anterior septum. In all our four specimens 

 1 found not only the same number, but also the same arran- 

 gement of the copulatory pouches ; therefore I believe it may 

 be considered as a specific character. There are 4 pairs of 

 seminal vesicles occupying segment 9 — 12; of these the 

 second pair is the least developed , the fourth pair is the 

 largest. The first pair of vesiculae seminales is attached to 



r^otes from tlie Leyden lMu.seu.in , Vol. IX. 



