l(, 2 CRUSTACEA MALACOSTRACA. III. 



vSouth-West of the Faeroes: Lat. 6i°i5' N., Long. o.°35' W., 463—515 fath.; $ l ! 2 spec. (3?, 2'/ 2 d 1 )- 

 Distribution. Taken twice west of Ireland in townet attached to trawl or dredge, 199 and 

 382 fath. (Tattersall). — The species is certainly pelagic in the deeper layers of the sea. 



Sub-Order Flabellifera. 



As already said on p. 4, I have with some reluctance let the family Anthuridse remain in this 

 sub-order, but remove the family Guathiidse, establishing it as a seventh sub-order after the Epicaridea. 



Family Cymothoidae. 



This very rich family comprises eight sub-families, but only two, viz. Cirolaninse and iEginse, 

 are represented in the material. Before the account of the forms some morphological points may 

 be treated. 



In 1903 I pointed out six movable joints in the peduncle of the antennae in Batliynomns and 

 some large species of Cirolana; in 1905 I mentioned the same fact as to Conilera Leach; in 1912 Ra- 

 covitza (in Biospeologica, XXVII, Cirolanides: Arch. Zool. Experiru. 5. Ser. Vol. X) found the same 

 number in two genera of his subterranean Cirolaninse, viz. Splmromides Dollf. and Typhlocirolana Ra- 

 cov. Thus several genera of the Cirolaninse possess the same number of joints in the antennal peduncles 

 as is well known in the Asellota, but while in this sub-order an exopod (squama) is most frequently 

 distinct, it has hitherto been impossible to find an exopod on the peduncles in any species of Cirola- 

 ninse. In the ^Eginse not more than five movable joints could be detected in the antennal peduncles. 



The structure of the maxillipeds in the male and the ovigerous female of Cirolana borealis 

 Lilljeborg I studied in 1890 (Cirolanidse . . ., the paper is quoted later on at the species), and it has been 

 investigated again, because Racovitza has attempted a new interpretation of the proximal elements of 

 these appendages in an ovigerous female of an allied form, Sphceromides Raymoitdi Dollf., believing 

 to be able to point out the pra-coxa, the joint now found by me in a couple of large forms of Asellota 

 (see above, p. 9). In the male of C. borealis I found no vestige of a prsecoxa, but saw that the figures 

 of the maxillipeds in both sexes published by me in 1890 are correct in every particular. I am not 

 prepared to think that the prsecoxa, which does not exist in the male, can be pointed out in the female 

 maxilliped, which has obtained peculiar expansions of the proximal parts, viz. first joint or coxa, epipod, 

 and second joint or basis, in order to create a current of fresh water to the ova or young. The joints 

 existing in the male have been much altered in the ovigerous female, and according to my opinion 

 the epipod, which in the male is a large undivided plate, has in the female been expanded and mem- 

 branous, with two oblong, smaller plates as remnants of the single large plate in the male. The small 

 plate marked / by Racovitza on his fig. V (p. 291) is also seen on fig. 1 1 in my paper quoted, to the 

 right of the first joint, the coxa (/), and I must consider this plate as being a part of the epipod, not, 



