98 
could be observed through the carapace that in one of the specimens (a female), the parasitic 
(no doubt adult) female had not begun laying eggs, whereas the two other specimens lodged 
not a few ovisacs beneath their carapace. 
REMARKS. In this small species the female is smaller and the eggs comparatively 
larger than in any other form of this family hitherto found. It is closely allied to Homoe- 
oscelis minuta, though the male in particular is easily distinguished from this species by 
its shorter legs. It may be observed that an examination of numerous specimens of [phinoé 
trispinosa from Denmark gave a negative result. 
III. Spheeronella satensky (1868). 
FEMALE. Head small, generally, though not always, defined from the trunk, 
which is ovate or globular, sometimes even a little broader than long. Maxillipeds large 
or rather large and at least always longer than the maxilla. Trunk-legs sometimes wanting; 
if found, they always consist of one minute cylindrical joint with a couple of terminal sete, 
or they are reduced to small eminences. Genital area is found and always well developed, 
so that the genital apertures — which are rather or very close together — and the entrances 
to the two receptacula seminis, which are situated close in front of them, are surrounded 
or at least bordered posteriorly and at the sides by common rather solid chitine. Caudal 
stylets are sometimes wanting; if found, they are shaped somewhat like the trunk-legs and 
terminate in one, two or three sete. — Spermatophores frequently observed. 
MALE. This sex is known in a little more than two thirds (twenty-five) of the 
species. The body, seen from below, is ovate or sub-globular (seen laterally, the back is 
much vaulted, the ventral side rather flat, sometimes even concave in the middle). The 
head always furnished with frontal and lateral borders. The trunk is covered with hairs 
on the larger part of the ventral surface, as a rule, also on its sides and on the whole or 
part of the back. Trunk-legs and caudal stylets sometimes wanting, but generally found, 
and in this case differmg much from each other. The trunk-legs always deviating very 
much from those of the females. 
OVISACS. Always deposed freely. 
LARVA. Observed in scarcely half of the species. Antenne at most a little 
longer than the antennule, sometimes very short. Maxillipeds situated close behind the 
maxilla. Peduncle of the natatory legs of medium breadth or narrow. Posterior abdominal 
segment together with the caudal stylets nearly always smaller than the penultimate segment. 
Long seta of the caudal stylets longer than half the length of the cephalothorax. 
POST-LARVAL DEVELOPMENT. Known or partly known in several species 
(s. above). 
