LEPrOLITHODES ASPER. 47 



appendages, bounded by the opposite crests of these segments, and forming 

 a passage for the admission of water to the gills. This orifice is similar to 

 that seen in Echinucerus foramiiudus Stimps., but it is not so perfectly formed. 



The apex of the abdomen (in the female) is turned to the right (most 

 strongly in the larger specimen) ; the marginal plates are wanting on the 

 left side ; all the abdominal appendages excepting the first are aborted on 

 the right side. 



Length, 64 mm. ; breadth, 75 mm. ; length of cheliped, 73 mm. ; length 

 of first ambulatory leg, 92 mm. (merus, 24 mm. j carpus, 20.5 mm.; propo- 

 dite, 18 mm.; dactylus, 18.5 mm.). 



Station 3-384. 458 fathoms. 1 fem. 



3394. 511 " 1 " ovig. 



The previously known species of Paralomis comes from the Straits of 

 Magellan. 



LEPTOLITHODES Bexedict MS. 



As before stated on page 45, a specimen of Paralomis granulosa in the 

 United States National Museum clearly demonstrates the generic diversity 

 of that species and the two forms assigned to Paralomis by Henderson in his 

 report on the Anomura of the '• Challenger " Expedition. In a paper 

 which will be published, before the present memoir, in the seventeenth vol- 

 ume of the Proceedings of the United States National Museum, Mr. J. E. 

 Benedict has established the genus LeploliiJiodes for the reception of Paralomis 

 aculcata Hend. and allied species. To this genus both P. aspera and P. longipes 

 of my preliminary report belong. 



Leptolithodes asper Fax. 

 Plate VIII. 



Paralomis aspera Fas., Bull. Mus. Coiiip. Zool., XXIV. 1G4, 1S93. 



Carapace pentagonal, as broad as long ; gastric, cardiac, and branchial 

 regions well defined and prominent ; the posterior portion of the postero- 

 lateral margin is raised into a rounded irregular ridge, and there is a round- 

 ish hump on each branchial region in front of the posterior margin of the 

 carapace ; whole surftxce of carapace and abdomen thickly beset with papilla 

 or tubercles, each one of which is encircled with a crown of stiff setae. Ros- 

 trum short, indistinctl}' tripartite, multispinose, lower part armed with as 



