203 



and concealed inside the frontal edge. Terminal joint of maxillipeds short, oval 

 or cordiform, setous only on the inner edge. 1st pair of incubatory plates with 

 the terminal lobe sharply denned and incurved; the succeeding pairs large, over- 

 lapping each other in the middle. Legs very small, scarcely projecting at all 

 laterally. Pleopoda with the lamellse rather large, lanceolate, and distinctly 

 tuberculate. Uropoda forming 2 smooth, juxtaposed lamella? considerably smaller 

 than those of the pleopoda. Male rather slender with the metasome gradually 

 tapering; last segment obscurely trilobate. Colour not yet stated. Length of 

 female reaching to 10 mm.; that of male 2 mm. 



Remarks. — The female of this species is described and figured in the 

 History of Brit, sessile-eyed Crustacea as Phryxus Hyndmanni. There cannot, 

 however, be any doubt that it is a genuine Pseudione, exhibiting, as it does, all 

 the chief characters of that genus; and it is also referred by M.M. Giard & 

 Bonnier to the 2nd section of their genus Palcegyge, which answers to the above- 

 named genus. By a strange mistake, the above authors have adduced to the 

 present species the Phryxus fusticaudatus of Sp. Bate & Westwood, indicating 

 it as the „phryxoid stage" of that species. This is most certainly wrong, and it 

 will be shown further on, that that form is in reality the immature female of a 

 very different Bopyrid, viz., Athelges paguri (Rathke). From the preceding spe- 

 cies the present one is easily distinguished both by the general form of the 

 body and by the structure of the several appendages. 



Occurrence. — A single specimen of this form was found by the present 

 author many years ago in the branchial cavity of a Eupagurus bernhardus taken 

 at Molde, west coast of Norway. Another specimen, exactly agreeing with the 

 former, is preserved in our Univ. Museum, having been found on a different 

 species of Eupagurus, viz., E. pubescens (Kroyer). I have, moreover, had an 

 opportunity of examining numerous specimens of this form belonging to the Mu- 

 seum of Copenhagen, all of them infesting young specimens of Eupagurus 

 bernhardus. 



Distribution. — British Isles (Sp. Bate), Kattegat and Skagerak (Meinert). 



3. Pseudione crenulata, G. 0. Sars, n. sp. 



(PL LXXXVI, fig. 1) 



Specific Characters. — Body of female oblong pyriform, rather asymme- 

 trical, one of the sides being almost straight, the other strongly curved. Ce- 

 phalon comparatively large, bordered anteriorly by a broad, evenly-arched fron- 



