4r>o 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOI-. XXIII. 



Mea!<iirniiiiil.^ nf l^<i</iirii.t uliufki'ii 



PAGURUS ALEUTICUS (Benedict). 



f Pagurus streblonyx Uwex, Beee-hey'f< \'oy., Z(jol., C'riis^t., 1839, p. 81 (not Leach). 

 Eupagurus aleuticus 'BEyiEDiCT, Proc. U. B. Xat. Mus., XV, 1892, p. 3. 

 Pagurus aleutkus Holmes, Occasional Paper Cali. Acad. Sci., VII, 1900, j). 136. 



The front has the three teeth sharper and a little more prominent 

 than in a/((.sk</tsis. The middle or ro.stral tooth is not quite so much 

 produced. The eyestalks are much stouter and some longer than in 

 aJasl'enslx. The eye scales are larger and less acuminate. The sul)ter- 

 minal spine does not show from aliovo. The acicles are broader at the 

 base than in alaslcensis. 



The chelipeds are stout. The carpal joints are armed with numer- 

 ous sharp spines. That of the left choliped is three-sided, and not 

 four, as in alashensis. The dactyls of both hands show from above a 

 smooth oblique surface, either flat or a trifle concave. In the sintdl 

 hand this surface is free from hair and granules; in the large hand it 

 is bordered with short spiny granules, and the granules inclosed are 

 very small. The spin}- granules of l)oth hands are bifurcate, except 

 those of the margin, which are simple. The dactvls of the ambulatory 

 legs are very wide and thin. The upper surfaces are entirely occupied 

 by a sulcus, deep at the base of . the article, becoming shallow at the 



