DESCRIPTIONS OF EARTHWORMS. 299 



certainty. It appears to me , that L. stagnalis by no means 

 can be identical with Alloh. complanata, as suggested by 

 Beddard; there is too great a difference in the shape of the 

 tail in both species. In Alloh. complanata the tail is com- 

 pressed , »en forme de feuille de myrte" according to Du- 

 gès, »in figura di foglio d'olivo" according to Redi , where- 

 as in L. stagnalis the posterior part of the body is »scharf 

 vierkantig" (Hoffmeister). 



EXPLANATION 



OF 



Plate 5. 



Fig. 1. Ac. Bilttikoferi Horst; general view of the con- 

 tents of the body-cavity : gl. intestinal coeca ; Iv. 

 lateral vessel; n. modified nephridia; o. ovary; pr. 

 prostate gland ; vs. vesicula seminalis. 



Fig. 2. a. Penial seta ; h. ordinary seta, x 36 diam. 



Fig. 3. The free extremity of a penial seta, highly mag- 

 nified. 



Fig. 4, The anterior part of the intestinal tract, to show 

 the two gizzards g and g' . x 2 diam. 



Fig. 5. Contents of the vesicula seminalis , highly mag- 

 nified. 



Fig. 6. A portion of the ovary, x 36 diam. 



Notes irona the Leyden INXixseaxu, "Vol. IX. 



20 



