100 PAGURUS SCABRIMANUS. 



Pagurus scabrimanus Dana? 



A single specimen of Pagurus , inhabiting the shell of 

 a Strombus gibberulus , is in the collection , which 1 refer 

 with some doubt to the Pag. scabrimanus Dana. As re- 

 gards the shape of the carapace, the relative length of the 

 the eyes and of the vicinal parts, the shape of the lar- 

 ger hand and of the two last joints of the left ambula- 

 tory leg of the third pair, our specimen agrees very well 

 with the figures of these parts of the body in the great 

 work of the American naturalist. But I will allow myself 

 the liberty to give a description of our specimen. The anterior 

 part of the carapace is nearly shaped as that of the com- 

 mon Pag. punctxdatus Oliv., but it is more depressed and 

 flattened and also more transverse , being somewhat broader 

 than long : its length (the distance from the front to the su- 

 tura cervicalis) measuring 5^/3 mm. , its breadth 6 mm. 

 The anterior margin of the carapace is quite similarly 

 shaped as in the punctulatus, the lateral margins are 

 straight , the gastrical region has also the same form as in 

 that species , the two lines that border it posteriorly 

 making nearly a right angle with one another (in the Pag. 

 depressus Heller, this angle is much more acute), and the 

 distribution of the small tufts of hair on its surface and 

 at the margins wholly agrees with that of the punctulatus. 

 The eyes are rather short and gross, scarcely as long (the 

 basal scale included) as the breadth of the anterior mar- 

 gin of the carapace , the basal scale of them being rather 

 quadrangular and broad and armed with some few teeth 

 and hairs on their anterior inner angle; they are a little 

 longer than the peduncle of the external antennae, but 

 scarcely as long as that of the internal. Carpopodite of 

 the left anterior leg armed with some spines at its upper 

 and outer margins and on the inferior part of the exter- 

 nal surface. — Form of the larger (left) hand wholly 

 agreeing with the figure of Dana; upper margin armed 

 with many strong spines, under margin denticulate , upper 

 r>^ote« from the Leyden JMuaeura, ~Vol. HI. 



