360 REPORT OF COMMISSIONER OF FISH AND FISHERIES [16] 



Measurements in millimeters. 



Station 



Sex 



Length from front of carapax to tip of telson 



Length of carapax along median line 



Breadth of carapax between spines of anterior angli 



Greatest breadth, including spines 



Length of fust periEopod 



Length of meins 



Length of carpus ■- 



Length of chela 



Length of dactylus 



Length of second perseopod 



Length of merus 



Length of carpus 



Length of propodus 



Length of dactylus 



Length of fifthperaiopod 



Length of propodus 



Length of dactylus 



Length of pleon .'. 



Greatest breadth at second somite 



Greatest breadth at sixth somite , 



Length of telson 



Breadth of telson 



Pentacheles nanus. 



2106 



2052 



2116 



2077 



2102 



P. sculp 

 tns. 



2115 



? 



46.0 



19.2 



8.2 



13.5 



40.0 



10.8 



6.0 



13.0 



7.8 



16.5 



4.0 



2.5 



6.1 



3.0 



10.0 



3.1 



0.9 



27.0 



10.1 



5.6 



8.5 



4.2 



9 



53.0 



22.0 



9.7 



15.5 



49.0 



14.5 



8.0 



15.5 



10.0 



20.0 



4.9 



3.2 



7.5 



3.3 



14.0 



4.3 



1.1 



31.0 



12.9 



7.0 



10.2 



5.1 



9 

 87.0 

 35.6 

 17.2 

 26.5 

 73+ 

 25.0 

 12.0 

 17+ 



34.0 



8.8 



5.4 



12.5 



5.3 



23.0 



7.5 



2.1 



52.0 



24.0 



11.8 



16.5 



8.0 



45.0 



19.0 



8.0 



13.2 



38.0 



11.1 



5.3 



12.0 



7.5 



16.0 



4.1 



2.3 



6.0 



2.7 



10.0 



3 2 



0.9 



26.0 



10.1 



5.5 



8.3 



4.1 



d" 



55.0 



22.8 



10.0 



17 



52.0 



15.0 



7.5 



16.0 



9.2 



20.0 



5.0 



3.2 



7.9 



3.5 



13.0 



4.2 



1.1 



33.0 



13.3 



7.2 



11.1 



5.2 



54.0 



23.2 



11.1 



16.0 



61.0 



19.0 



11.4 



20.0 



12.0 



20.0 



5.3 



3.2 



7.5 



3.3 



12.0 



3.2 



0.9 



30.0 



12.6 



6.8 



10.0 



4.6 



Specimens examined. 



Pentacheles debilis, sp. nov. 



This is represented by two immature males only, but it is apparently 

 so different from either of the foregoing species or any of those described 

 by Bate or Milne-Edwards, that I venture to describe it. Of the de- 

 scribed species it is probably most nearly allied to P. validus A. M.- 

 Edwards. 



The dorsal surface of the carapax is much flatter than in P. sculptus 

 or P. nanus, broader posteriorly, the greatest breadth being a little back 

 of the middle branchial regions, and the sublateral carinas of the branch- 

 ial regions are indistinct or wanting. The orbital sinuses are deep, 

 very much narrowed posteriorly, and the inner angles project forward 

 in a spine-tipped angle far in advance of the rostrum. Including the 



