29 



of the species at present known to me, and I thiuk this will 

 never be the case. 



Goeze's description and drawings, however, are sufficiënt enough 

 to recognize the species, which I will describe below, and of 

 which I have made drawings as exact as possible, to settle the 

 question at once. Goeze's creature viz. has posteriorly four distinct 

 bristles, and therefore may have been with great certainly a female 

 of the present species (see my figures 45 — 48). 



The synonymy from the year 1800 up to date will be studied 

 by me afterwards. I am convinced that the creatures delineated 

 and described after Goeze are relative to other species. 



Protonympha. Length 640 /*. Dorsal side (Fig. 35). There are 

 two dorsal shields. 



On the anterior dorsal shield there are two median pits and 

 4 pair of other pits. One pair of pits is situated between the two 

 shields. The posterior dorsal shield shows 3 pits of which one 

 lies in the median line. Behind the posterior dorsal shield there 

 are only two small hairs. — Ventral side (Fig. 36). There is a 

 large jugular shield, a nearly circular sternal shield and a small 

 anal shield. The sternal shield has a little top directed forward, 

 and bears 3 pairs of small hairs. — The stigma is ventral or 

 rather lateral. The opening of the excretory organs is visible near 

 the end of the peritrema. Between the sternal and anal shields 

 there are 4 pairs of small hairs. — Legs. On the ventral side all 

 the hairs are small! (Fig. 36). 



Deutonympha. Length 656 /x. — Dorsal side (Fig. 37). There 

 is only one dorsal shield, provided with the 3 median and the 6 

 pairs of other pits, exactly as in the protonympha. Behind the 

 dorsal shield there are 2 pairs of small hairs. — Ventral side 

 (Fig. 38). There is a small jugular shield, a nearly circular 

 sternal shield and a small anal shield. The sternal shield bears 3 

 pairs of small hairs, and behind it there are 8 pairs of small hairs. 

 The stigma is lateral. No openings of excretory glands are discer- 

 nable. Most probably they are hidden under the coxae 3, but I 

 failed to detect them. Legs like those of the protonympha, but longer. 



