276 
BRITISH ENTOMOSTRACA. 
derable size, rather prominent in centre, and not notched. 
Antennae of moderate size. Thorax much shorter than 
carapace, narrow. Penultimate joint small ; last joint 
rather longer than broad, obcordate, and deeply lobed 
at posterior extremity. Abdomen short. Caudal plates 
small ; terminal setae of moderate length and plumose. 
Sternal fork well developed, with long, simple, slender, 
sharp-pointed branches. Oviferous tubes long and slender. 
Males not seen. 
Hab. — Found on Orthagoriscus molce ; taken on County 
Antrim coast, September 1848, W. Thompson, Esq. 
4. Lepeoptheirus hippoglossi. Tab. XXXII, fig. 12. 
Caligus hippoglossi, Kroyer, Tidsskrift, i, 625, t. 6, f. 3. 
— M. Edwards , Hist. Nat. Crust, iii, 456, No. 14. 
Binoculus piscinus, 0. Fabricius , Faun. Greenland., 239. 
Description . — Female . Carapace large and rounded, 
deeply lobed on each side. Frontal plates of moderate 
size. Antennae of considerable size, setiferous on edge 
and at extremity. Thorax about two thirds the length of 
the carapace, and much narrower; last joint elongate, 
quadrilateral, slightly lobed at each terminal angle. Ab- 
domen very short. Caudal plates very small, and giving 
off four short, plumose setae from each. Sternal fork 
twice bipartite ; the branches of second fork short and 
truncate. Oviferous tubes rather longer than the body. 
The whole animal is beautifully marked with pink or red 
spots, distributed in an irregular pattern over the whole 
carapace, thorax, abdomen, and outer surface of fourth pair 
of legs. It is the most beautiful species I have seen ; but 
the colours fade and disappear in spirits. Specimens 
of this elegant creature were sent several years ago by 
Dr. Johnston of Berwick to Mr. Westwood, who at that 
time was engaged upon the Crustacea, but they were not 
described. Since then the species has been described by 
Kroyer. 
