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. 



Hab. — 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.^) 

 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 pygmciea, T. Scott. 



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



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

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



vol. xvii. p. 461. 



ffah. — 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 Annuls 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 liistory. I find, however, that the name Evansia is pre- 

 occupied for a genus of spiders, described by the Rev. 0. 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. 



