292 DESCRIPTIONS OF EARTHWORMS. 



extending from segment 13 (14) to 19; it is distinguished 

 from the remaining part of the body as well by its darker 

 colour, as by the pronounced glandular integument of its 

 segments. However at its ventral side there is a small area 

 without glandular development, bounded on each side by 

 a narrow groove , that runns from the genital pore on 

 the 17th segment to that on the 19th ring. Each segment 

 is divided by two transverse grooves in three annuli , the 

 median of which is elevated as a ridge and bears the 

 bristles; the longitudinal diameter of a segment in front 

 of the girdle is as large as that of three segments behind 

 it. The dorsal pores appear to commence behind the cli- 

 tellum. 



The penial setae differ widely in their appearance from 

 those of Ac. Schlegelii; they were already described in my 

 foregoing paper and are illustrated in figg. 2 and 3. 



In dissecting our worm from the dorsal side we are 

 struck by the strong development of the mesenteries in 

 segment 5 to 12; especially the anterior of them are so 

 stout and thick, that the intestinal tract is entirely con- 

 cealed by them (fig. 1). Apparently this has been the 

 cause , that I overlooked before a remarkable character of 

 the alimentary canal , hitherto not observed in any species 

 of Acanthodrilus , viz. the presence of two gizzards. A 

 short oesophagus leads from the pharynx to the first giz- 

 zard and extends into the 5th segment ; it has a somewhat 

 conical shape and its anterior portion lies entirely con- 

 cealed between two large glands , fixed on the 5th septum , 

 its posterior margin being limited by a rather deep con- 

 striction. The first gizzard (fig. A, g) lies in the 6th seg- 

 ment and is separated by a narrow, thin-walled , oesopha- 

 geal portion from the second gizzard (fig. 4, g'), which 

 extends into the 8th ring. 



Though we know some other Lumbricidae {Digaster^ 

 Moniligaster^ Didymogaster) to possess two or more distinct 

 gizzards, it is the first time, as far I am aware of, that 

 we meet with a species , showing the same character, but 



Notes from the Leyden M!«seum , "Vol. JX. 



