250 
f. i. D. stagnalis and perhaps to other genera too, in which 
the tail of the male is different from that of the female. In the 
month of June a male in moult was takén åt the Furesø; the 
animal had the appearance of a female with long pointed tail, but 
the old cuticula "contained a fully developed male with the tail 
rounded and with spicules and preanal papillæ. I give a figure of 
my preparation of this specimen (fig. 38); it proves that the young 
male has the shape of a female till maturation. 
- The number of the papillæ is varying individually. in the 
male. De Man indicates' 19 for his male; the same number I 
Count in the above named male from Varde Aa; on the young 
male, still inclosed in the larval skin is seen 15; on a male from 
"Lynæs I count 17; in another, abnormally having the papillæ 
';arranged in groups I count 18. This specimen is . figured 
(fig. 48). 
As. to the front part of the animal I do not find the Danish 
specimens agreeing perfectly with the figure and description of 
de Man; he writes: ,,Die Kopfregion ist abgesetzt, niedrig, 
'scheibenfårmig".. In the Danish specimens the front end is more 
rounded and the constriction behind the ,;head" not so strongly 
marked. 
Zeiss .Okularmikrom. AA, OG. 2: 
Q with 7 eggs in the 2 without eggs. då from Lynæs. 
REE He j 
Length 175 =— Length 247 — Length 126 = 
288 mm 4,00 mm. 2,04 mm. 
Oes. 40. Oes. 52. | Oes. 42. 
Vulva 85. Vulva 127. Tail 2. 
Tail 10, i Tail 16. | Width 3 
Width 4. Width 4. 
az — 44 gå 68 u— 42 
2 4/2 BI= ls kr 8 
