342 Proceedings of the Royal Physical Society. 



Genus (78) Leptastacus, T. Scott, 1906. 



189. Leptastacus macronyx, T. Scott. 



1892. Tetragoniceps macronyx, T. Scott, Tenth F. B. Rept., pt. iii. 



p. 253, pi. x. figs. 19-28. 

 1906. Leptastacus macronyx, T. Scott, Ann. and Mag. Nat. Hist. (7), 



vol. xvii. p. 461. 



Hdb. — Dredged off St Monans in 1891, and again in May 

 1901 ; not very common. 



Genus (79) Evansula, T. Scott, nov. nom. 

 (Syn. Evansia, T. Scott, preoccupied for a genus of Spiders. 1 ) 

 190. Evansula incerta, T. Scott. 



1892. Tetragoniceps incertus, T. Scott, Tenth F. B. Rept., pt. iii. 



p. 254, pi. xii. figs. 1-17. 

 1906. Evansia incerta, T. Scott, Ann. and Mag. Nat. Hist. (7), 



vol. xvii. p. 461. 



Hah. — Dredged off St Monans in 1891, and again in May 

 1901 ; not common. 



191. Evansula pygnma, T. Scott. 



1903. Tetragoniceps pygmosus, T. Scott, Twenty-first F. B. Rept., 



pt. iii. p. 117, pi. iv. figs. 11-19. 

 1906. Evansia pygmaza, T. Scott, Ann. and Mag. Nat. Hist. (7), 



vol. xvii. p. 461. 



Hdb. — Collected near Musselburgh in 1894. This differs 

 from the last by its smaller size, and in the structure of fifth 

 thoracic feet and caudal joints. 



1 In the Annals and Magazine of Natural History for May 1906 I instituted 

 a genus of the Copepoda under the name of Evansia, in compliment to 

 William Evans, Edinburgh, a successful investigator in various departments 

 of Scottish natural history. I find, however, that the name Evansia is pre- 

 occupied for a genus of spiders, described by the Rev. O. Pickard Cambridge 

 in Proc. Dorset Nat. Hist, and Antiquarian Field Club, vol. xxi. p. 37, and 

 I therefore adopt the modified form Evansula for the Copepod genus 

 referred to. 



