A JAPANESE HERMIT 165 



and its immediate neighbours by the possession of a con- 

 spicuous appendage in the male at the fifth pair of legs, 

 and distinguished from one another by the shape and 



Fig. I'L—Spii-opagurus spiriger (de Haan), with separate figure of the fifth pair of feet 

 carrying the spiral appendage. 



position of that appendage. They are alike in having the 

 fourth pair of legs subchelate. 



Sjnropagurus^ Stimpson, 1858. The fifth leg of the 

 male on the left side has at the base a more or less spirally 

 twisted appendage (the protruded vas deferens). 



Catapagurus, A. Milne-Edwards, 1880. The fifth leg 

 of the male on the right side has at the base an appendage 

 curved in one plane round the right side of the pleon. 



Anapagurus, Henderson, 1886. The fifth leg of the 

 male on the left side has at the base an appendage which 

 is short and curved, instead of long and coiled. 



That the distioguishing feature of S piropaguf us ^\di wot 

 escape the notice of de Haan is clear from the description, 

 the figures, and the specific name of his Pagurus spiriger. 

 This, which is the type species of Spiropagunis, is now 

 found to be widely distributed in Eastern waters. 



