PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 443 



Some of tlie legs of these specimens give tlie following measure- 

 ments: 



Stations 870, 871, 873, 877, 878, 880 ; 100 to 252 fathoms. Three females 

 from 878, 142 fathoms, were carrying eggs. 



The genus Pandalus, as at present recognized, apparently contains 

 species representing two or more genera, and the species just described 

 is probably not strictly congeneric with P. Montagui, the type species. 

 The equal, chelate legs and the slender, unarmed dactyl! of the third, 

 fourth, and fifth jiairs of legs sex^arate P. temiipes widely from Montagui. 

 The oral appendages afford some characters not indicated in the above de- 

 scription. In P. temdpes the proximal segment of the mandibular j)alpus 

 is dilated, though not quite as conspicuously as in P. Montugm ; the pos- 

 terior lobe of the scaphognath of the second maxilla is very short, broad, 

 obtusely rounded at the extremity, and projects' very little back of the 

 base of the endognath, while in P. Montagui and the allied species it is 

 very mucli liiolonged and acutely triaugidar j)osteriorly ; in the second 

 maxilliped the dactylus is about as long as broad and articulated with, 

 the oblique distal end of the propodus, while in P. Montagui and its al- 

 lies the dactylus is a narrow plate, articulated by one edge to the distal 

 l^art of the mesial edge of the propodus. 



The branchiae of P. tenuipes are the same in number and arranged in 

 the same way as in P. Montagui and P. borealis; that is, there are twelve 

 branchise plus seven epipods on each side; or, stated in full, the branchial 

 formnlais: 



