CYRTOPHIUM DARWINII. 483 



males in having the hand of the second pair of legs 

 smaller, and the body less compressed. 



It is our opinion that L&tmatophilus tuberculatus, of 

 Bruzelius, may be the female of a species of this genus 

 in which the penultimate pair of caudal appendages have 

 been broken off and are undergoing the process of repro- 

 duction. This suggestion is, indeed, founded only upon 

 negative evidence; moreover, we think that we should 

 be doing the author of the " Skandinaviens Amphipoda 

 Gammaridea " injustice, in the present state of our in- 

 formation, if we were to insert his genus Lcetmatophilus as 

 a synonym of Cyrtophium of Dana, although we anticipate 

 that they will ultimately be proved to be the same. 



