120 Proceedings of the Royal Physical Society. 



Nat. Hist, Ser. 6, vol. ix. pp. 454-464, and Ser. 6, vol. x. 

 pp. 143-166, and 241-263, 1892. 



Family Euphausiida 

 Genus (1) Nyctiphanus, G. 0. Sars, 1883. 



1. Nyctiphanus norvegica (M. Sars). 



1856. Thysanopoda norvegica, M. Sars, Forhandl. Scand. Naturf. 

 MbdeiChr., p. 169. 



Habitat. — Firth of Forth, young specimens not uncommon 

 (Henderson). 1 Nyctiphanes was usually scarce in our tow- 

 net collections, but it appears to be scarcer some years than 

 others. 



Genus (2) Rhoda, G. Sim, 1872. 



2. Rhoda Raschi (M. Sars). 



1863. Thysanopoda Raschi, M. Sars, op. cit., p. 7. 



1872. Rhoda Jardineana, G. Sim, Scottish Naturalist, vol. i. p. 187, 



pi. iv. fig. a. 

 1883. Boreophausia Raschi, G. 0. Sars, Chr. Vid.-Selsk. Forhandl., 



No. 7, p. 11. 



Habitat. — Firth of Forth, moderately frequent, and gener- 

 ally distributed. 



3. Rhoda inermis (Kroyer). 



1849. Thysanopoda inermis, Kroyer, Voyage in Scand., Crust., 

 pi. vii. fig. 2, a-t. 



Habitat.— Firth of Forth, captured in 1892 and 1894. 



Genus (3) Thysanoessa, F. Brandt, 1851. 



4. Thysanoessa neglecta (Kroyer). 



1849. Thysanopoda neglecta, Kroyer, op. cit,, pi. vii. fig. 3, a-d. 

 1872. Thysanoessa aberdonensis, G. Sim, Scottish Naturalist, vol. i. 

 p. 188, pi. v. figs. 1-8. 



Hahitat. — Firth of Forth, frequent. 



5. Thysanoessa longicaudata (Kroyer). 



1849. Thysanopoda longicaudata, Kroyer, op. cit., pi. viii. fig. 1, 

 a-f. 



Habitat.— Firth of Forth, off St Monans, 1891; a few 



1 "Decapod and Schizopod Crustacea of the Clyde," Trans. Nat. Hist. Soc. 

 Glasgow (1886), p. 38. 



