98 



could be observed through the carapace that in one of the specimens (a female), the parasitic 

 (no doubt adult) female had not began la}ing- eggs, whereas the two other specimens lodged 

 not a few ovisacs beneath their carapace. 



REMARKS. In this small species the female is smaller aiid the eggs comparatively 

 larger than in any other form of this family hitherto found. It is closely allied to Romoe- 

 oscelis mimda, though the male in particular is easily distinguished from this species by 

 its shorter legs. It may be observed that an exanunation of numerous specimens of Iphinoe 

 trispinosa from Denmark gave a negative result. 



III. SphaerOUella Salensky (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 maxillae. Trunk-legs sometimes wanting; 

 if found, they always consist of one minute cylindrical joint with a couple of terminal setae, 

 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 setae. — Spermatophores frequently observed. 



MALE. This sex is known in a little more than two thirds (twenty-five) of the 

 species. The body, seen fi'om 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 differing much from each other. The trunk-legs always de-\iating very 

 much from those of the females. 



OVISACS. Always deposed freely. 



LARVA. Observed in scarcely half of the species. Antennae at most a little 

 longer than the antennuls, sometimes very short. Maxillipeds situated close behind the 

 maxillae. 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). 



