ON THE FOEMATION OF THE EGG IN THE ANNHLOSA. 
607 
mens of lAthoUus ^ilicornis seven were males; in L. forjlcatus the only two specimens 
examined were males ; and out of three specimens of L, variegatus two were females, 
making altogether ten males to eight females. 
The number of labial teeth is used by Newport as a specific character ; but I found 
in this respect an astonishing want of symmetry : thus, in the few specimens examined 
by me, a male L. variegatus^' had seven labial teeth on one side and nine on the other; 
three specimens of L. pilicornis had six teeth on one side and only five on the other, 
while two others had only four teeth on one side ; making altogether, out of twenty- 
eight specimens, nine which were abnormal in this respect. 
In addition to the Gregarinas, which are very generally found in the Myriapods, and 
particularly in Folydesmus and Glomeris, I have met with a few other parasites. A spe- 
cimen of lAthohius pilicornis contained, not in the intestinal canal, but in the general 
canty of the body, two Nematoid worms 3 inches in length. Two other specimens of 
the same species contained respectively one or two dipterous larvae. 
Cryptops (Plate XVI. figs. 19, 20, 21). — In this genus the ovary is narrow, and its walls 
are very delicate. The eggs are not arranged with any regularity as to size. They are 
at first round, but soon become elongated, with their longer axis parallel to that of the 
ovary, and do not appear to be so numerous as in lAthohius. As in most other genera of 
Myriapods, the macula is single at first ; but in this genus, as in Gloineris, a secondary 
smaller macula may in subsequent stages almost invariably be found in the Purkinjean 
vesicle. It is remarkable that this genus should differ so entirely from Lithohius in the 
histoiy of its macula. The formation of the eggs in other respects is, however, very 
similar in these two genera. The epithelial nuclei on the egg-follicles could in some 
cases be very plainly seen ; but the ovary did not contain any loose nuclei or cells, except 
those which had already become young eggs. These latter seem to come to maturity 
late in the autumn. A female examined in the middle of September contained no ripe 
eggs ; indeed the largest ones were only 4 ^ 0 ^^ i^ch in length, and the yelk had 
only just begun to darken. 
Another female, examined on the 24th of October, was more advanced; and a few of 
the eggs were opake, though none were yet quite ready to be laid. 
Acetic acid darkened the yelk but slightly, and brought no vitelligenous bodies into 
view. It dissolved the macula as usual. 
In all the specimens examined by me, the spermathecae were full, but contained 
filiform spermatozoa only, without any of the ovoid cells which accompany the sperma- 
tozoa in the spermatophores. These spermatophores were, I believe, first observed by 
M. Fabre, and I could add little to the excellent description of them given by him. 
He does not, however, mention in the textf, although he has represented in his figure, 
certain small elliptic bodies which are found in the spermatophores with the filiform 
* Another specimen, of which the sex was not determined, had only six teeth on one side ; and two others 
had eight on one side and seven on the other. 
t Unless under the name of the “pulviscule blanche,” which forms a layer round the spermatozoa. 
