132 . Proceedings of the Royal Physical Society. 



fathoms, 9th July 1901. This, like the species already 

 recorded, was obtained in the deeper parts of the estuary. 



5. Leptognathia breviremes (Lilljeborg). 



1865. Tanais breviremis, Lillj., op. cit., p. 21. 



Habitat. — Firth of Forth, 1891 and 1892; moderately rare. 



6. Leptognathia Lilljeborgia^ Stebbing. 



1891. -Leptognathia Lilljeborgia, Stebbing, Ann. and Mag. Nat. 

 Hist. (6), vol. viii. p. 328, pi. 16. 



Habitat. — Largo Bay, and off Musselburgh, in 1891. Off 

 North Berwick in December 1892. Off Aberdour, November 

 1893; apparently rare. 



7. Leptognathia longiremis (Lilljeborg), var. 



1865. Tanais longiremis, Lilljeb., op. cit., p. 19. 

 1901. Leptognathia, longiremis, var., T. Scott, Nineteenth F. B. 

 Kept., pt. iii. p. 269, pi. xviii. figs. 30-38. 



Habitat. — Off North Berwick, December 1892 and January 

 1894. Off Musselburgli, 30th May 1891, and in the neigh- 

 bourhood of the Bass Rock on 9th July 1901. This form, 

 as shown by the drawings in the Fishery Board Report 

 referred to, differs from the typical L. longiremis by the 

 apparent absence of the lateral denticles on the terminal 

 segment of the metasome, and, moreover, the antennules in 

 the female are sometimes composed of five instead of four 

 joints. Perhaps variety varia might be a suitable name for 

 this form.^ 



Genus (5) Tanaopsis, G. 0. Sars, 1896. 



8. Tanaopsis laticaudata^ G. 0. Sars. 



1881. Leptognathia laticaudata, G. 0. Sars, Archiv f. Math, og 

 Naturvid., p. 43. 



Habitat.— ¥hl\i of Forth, 1891. Dredged at Station III. 

 on 23rd May, and at Station VII., in 17 fathoms, on 9th 

 July 1901. 



^ As there are no specimens in my collection of the Leptognathia rigida, 

 Spence Bate, mentioned in my Notes on some Scottish Marine Isopods, I am 

 unable to verify the record, and prefer, therefore, to excluue it from the 

 present Catalogue. 



