207 



the uropoda to the projecting lamellse of the pleopoda, 2 of which may have 

 been wrongly adduced to the last segment. The above mentioned opinion 

 entertained by Messr. Giard and Bonnier, that this form is only the ,.phryxoid 

 stage" of Pleurocrypta galathew, Hesse, cannot be admitted, since the specimens 

 examined by me had all characters of being fully grown animals. 



Occurrence. — Two specimens of this form are in our Univ. Museum, 

 having been taken many years ago by my late father at Manger, west coast of 

 Norway, from the branchial cavity of Galathea nexa. The host of the specimen 

 figured by Sp. Bate and Westwood is not stated, but they assert to have re- 

 ceived another much larger specimen taken from an old Galathea squamifera, 

 and the Rev. A. M. Norman announce it even from Eupayurus Thompsoni. As 

 to the latter statement, I am, however, disposed to believe, that a confusion of 

 this form with Pseudione Hyndmanni might have taken place. 



Distribution. — British Isles, Shetland Isles (Sp. Bate). 



2. Pleurocrypta marginata, G. 0. Sars, n. sp. 



(PI. LXXXVII, fig. 1). 



Specific Characters. — Body of female comparatively short, oval or 

 broadly pyriform in outline, and rather asymetrical in full grown specimens, the 

 one side being almost straight, the other boldly curved. Cephalon rather large 

 and broad, with the frontal margin evenly curved and pronouncedly lamellar, 

 lateral corners obtusely produced. Segments of mesosome well defined, with the 

 lateral parts somewhat elevated ; coxal plates very fully developed, subcontiguous, 

 forming a broad marginal area. Metasome comparatively small, not attaining 

 l li of the length of the body, epimeral plates on one side more fully developed 

 than on the other, and subimbricate. Eyes distinct. Legs wholly concealed be- 

 neath the largely developed coxal plates. Incubatory plates large, overlapping 

 each other in the middle. Pleopoda not very large and but little projecting 

 beyond the epimeral plates, lamellse quite smooth. Uropoda unusually elongated, 

 forming 2 slender, almost filifoim appendages, about twice the length of the 

 lamellse of the pleopoda. Male very narrow, sublinear in form, metasome forming 

 an undivided narrowly conical piece, obtuse at the tip. Colour not yet stated. 

 Length of female 5 mm., of male IV2 mnn. 



Remarks. — This new species is easily distinguished from the preceeding 

 one in both sexes, the female being of a considerably shorter and stouter form, 

 whereas the male is quite contrary much more slender than that of P. longi- 



