1903.] PLANKTON OF THE FAEROE CHANNEL. 125 



AUGAPTILUS ZETESIOS Wolfeiiden, op. cit. p. 369. 

 "One specimen only was found, in the bottle marked 19 a. c. 

 Another specimen occurred in the sample marked 20." 



EUCALANUS CRASSUS Gbt. 1888, Atti Ace. Line., and 1892, Fauna 

 u. Flora Neapel, v. p. 19. 



" This species was of not infrequent occurrence, especially in 

 the bottles marked B 1 and 13 k (2 to 0) and 13 i (100 to 0). 



" The writer also has frequently noted its occurrence in the 

 Faeroe Channel." 



GAETANUS MAJOR Wolfenden, sp. n. 



" Two examples of this genus (Gaetanus) were found in 

 Dr. Fowler's collection marked 19 a (480 to 350 fathoms). The 

 copepod very greatly resembled Gaetanus armiger Gbt., but the 

 anterior antennae were longer, reaching beyond the f urea by the 

 length of the last joint ; the spines of the last thoracic segment 

 were comparatively shorter, the 1st abdominal segment and the 

 anal segment shorter, and the furcal segments only as long as 

 broad (longer than broad in G. armiger), and each abdominal 

 segment had a row of pectinations on the posterior border. The 

 saws of the swimming-feet possessed more teeth ; the abdomen 

 was not nearly half the length of the cephalothorax, and the 

 whole length of the animal was 5' 3 mm. In all these points it 

 differed from the typical G. armiger, the size of which reaches 

 only about 3 mm., and justifies its being made into a separate 

 species." 



GAIDIUS Gbt. 1895, Bull. Mus. Harvard. 



" A good many examples of this genus occurred in the deep- 

 water collections of Dr. Fowler, e. g. in the bottle marked Meso- 

 plankton 20 (500 to 100 fathoms). 



There is no doubt that in the Faeroe Channel there are two 

 kinds of Gaidius one agreeing in every particular with the 

 Gaidius pungens of Giesbrecht ; the other, a larger species, also 

 differing in the segmentation of the 1st and 2nd feet. Gaidius 

 pungens Gbt. has the exopodite of the 1st foot with only two 

 segments and the endopodite of the 2nd foot with only one seg- 

 ment ; whereas the northern species has a 3-jointed exopodite 

 of the 1st foot and a two- jointed endopodite of the 2nd foot. 

 There are other minor differences. In size the northern species is 

 much larger ; Gaidius pungens Gbt. being 4^ mm., as compared 

 with about 3 mm. The Chiridius tenuispinis of G. 0. Sars is the 

 same species, all being characterized by the peculiar series of 

 lamellar appendages of the basipodite of the 4th foot." 



PSEUDAETIDEUS ARMATUS Wolfenden. 



" Some examples of this species occurred in Dr. Fowler's col- 

 lection. It was drawn and described (in MSS. only) before the 



