576 



MR. L. V. BORRADAILE ON CRUSTACEANS [May 22, 



Subfamily Thiinje. 

 Genus Kraussia Dana, 1S52. 



13. Kraussia rastripes Miiller, 1887. 



Kraussia rastripes, Miiller, Verh. Nat. Gres. Basel, viii. 2, p. 480, 

 pi. iv. fig. 5 (1887). 



The ridges on the moveable fiuger of the specimen are not so 

 distinctly tuberculated as in Midler's figure. 



Rotuma ; one female. 



Family Canceibi. 



By the removal of the subfamilies of the Atelecyclidae, the 

 family Cancridae becomes restricted to the Cancrinae and Piri- 

 melinaB, with perhaps also the Carcinidinae ( = Carcininae). Thus 

 narrowed it is essentially a circumpolar group, and it is not sur- 

 prising that it is unrepresented in the present collection. 



Family Portunid^e. 



The following tables, showing the schemes of classification 

 adopted by Ortmaun 1 and Alcock 2 respectively, make it clear that 

 there is a considerable difference of opinion between the authors 

 in question, though in the main they may be said to be in accord. 



Alcock. 

 Subfamilies. Alliances. 



Carcinoida. 

 Portumnoida. 



Portumninae. 



Portuninae. 

 Capbyrinae. 



Lupiuae. 



Portunoida. 

 Ccenophthalmoida. 



Lupocycloida. 



Lupoida. 



Podophthalmoida. 



Ortmann. 



Subfamilies. 



Portumniuae. 

 Portuninae. 



Carupinae. 



Thalamitiuae. 



Podophthalminae. 



Roughly speaking Ortmann's subfamilies correspond to alliances 

 in Alcock's classification, but there is considerable divergence in 

 detail. 



Neither author refers to the somewhat remarkable genus 

 Goniocaphyra de Man, which is not only impossible to place in 

 any subfamily of either author as defined, but appears to have a 

 distinct standing of its own, and to deserve a separate subfamily 

 for its reception. 



1 Ortmann, Bronn's ' Thier-reich,' v. 2, p. 1170 (1899). 



2 Alcock, Journ. Soc. As. Beng. Ixviii. 2, i. p. 6 (1899). 



