316 Proceedings of the Royal Physical Society. 



Genus (42) Amenophia, Boeck, 1864. 



79. Amenophia peltata, Boeck. 



1864. Amenophia peltata, Boeck, Oversigt af Norges Copepoder, 



Chr. Vid.-Selsk. Forhandl., p. 45. 

 1880. Thalestris peltata, G. S. Brady, I. c, vol. ii. p. 138, pi. liii. 



figs. 11-19. 

 1895. „ „ T. and A. Scott, Ann. and Mag. Nat. Hist. 



(6), vol. xiv. p. 35, pi. XV. figs. 11-15; 



pi. xvi. figs. 1-8. 



Rah. — Dredged off Musselburgh ; not common. The species 

 differs from the typical Thalestris in the body being very 

 depressed and in the structure of some of the appendages, 

 as shown by the drawings in the works referred to. 



Genus (43) Westwoodia, Dana, 1855. 



80. Westiuoodia noMlis (Baird). 



1845. Aipacticus nobilis, Baird, Trans. Berw. Nat. Club, vol. ii. 



p. 155. 

 1880. IVestwoodia nohiJis, Brady, Brit. Copep., vol. ii. p. 141, 



pi. Ixiii. figs. 1-13. 



Hah. — Taken at Cramond Island in rock-pools between 

 tide-marks, and in dredged material collected off Musselburgh 

 in 3 to 4 fathoms ; not common. 



Genus (44) Pseudothalestris,i Brady, 1883. 



81. Pseudothalestris Andrewi (T. Scott). 



1894. Pseud oivestwoodia Andreici, T. Scott, Twelfth F. B. Kept, 

 pt. iii. p. 257, pi. ix. figs. 21-29. 



Hah. — Dredged off Burntisland in 3 to 4 fathoms water; 

 frequent. 



This group of Copepods have so close a general resemblance 

 to Westivoodia, Dana, that I ascribed the first species to a 

 new genus, Pseudoivestiooodia, which recognised that resem- 

 blance, but afterwards I discovered that they were identical 



•^ Tlie genus Pseudothalestris is closely related to IVestwoodia, Dana, but as 

 it contains a group of species which ditfer distinctly in the structure of the 

 first pair of thoracic feet, I prefer to retain it as a separate genus. 



