276 BRITISH ENTOMOSTRACA. 



derable size, rather prominent in centre, and not notched. 

 Antennae of moderate size. Tliorax 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. 



Hah. — Found on Orthagonscus molce ; taken on County 

 Antrim coast, Septeml^er 1848, W. Thompson, Esq. 



4. Lepeoptheirus hippoglossi. Tab. XXXTI, fig. 12. 



Caligtjs htppoglosst, Kroyer, Tidsskrift, i, G25, t. 6, f. 3. 



— M. Edwards, Hist. Nat. Crust, iii, 456, No. 14. 



BiNOCULUS PisciNUS, 0. Fabricius, Fuun. Groenlaud., 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 

 desci-ibed. Since then the species has been described by 

 Kroyer. 



