NYMPHONIDAE 35 



14. Second tibia the longer segment 15 



First tibia the longer segment [cJ oviger of type II] 21 



15. Total number of denticulate spines on oviger at least 70 ; chela with immovable finger very 



short, only half of palm, 24-28 crowded spinules on each finger ; tarsus half of propodus. 



N. nniltidens, n.sp. 

 Total number of denticulate spines on oviger 54-59 ; 14-22 spinules on each finger of chela ; 



tarsus and propodus subequal {S oviger of type I] N. gracilipes, Miers 



Total number of denticulate spines on oviger 46-30 16 



Total number of denticulate spines on oviger less than 25 20 



16. Approximately twice as many spinules on movable as on immovable finger of chela 



iN. distensum, Mobius^ 

 \A^ signaiiim, Mobius 

 An almost equal number of spinules on each fiinger of chela or diflterence not exceeding 



2 5 per cent 1 7 



17. Second coxa half as long again the sum of the first and third or longer i8 



Second coxa short, subequal to the sum of the other two [neck short; ^ oviger of type II 



and segment 7 termino-laterally articulated on segment 6; 40-46 spinules on each 

 finger of chela ; at least 30 femoral gland-openings in cj] N. orcadense, Hodgson 



18. Tarsus and propodus subequal (f-|); 27-40 spinules on each finger of chela; S oviger of 



type I; 10-16 femoral gland-openings in ^ iV. hiemale, Hodgson 



(? = iV. gracilliinitm, Caiman) 



Tarsus J— § of propodus 1 9 



19. Neck long ; 14-24 spinules on each finger of chela ; oviger of type I a and 4 femoral gland- 



tubercles in cj N. subtile, Loman 



Neck short to medium ; 30-45 spinules on each finger of chela ; oviger of type I b and 10-12 



femoral gland-openings in (J ^- clarenci, n.sp. 



20. Less than 10 spinules on each finger of chela; tarsus half of propodus; oviger of type I a 



and 4 femoral gland-tubercles in S N.pmicidens, n.sp. 



[15-16 spinules on each finger of chela; neck long; tarsus half of propodus, the latter 



spinose on ventral margin (type immature) N. frigidiim, Hodgson] 



19-30 spinules on each finger of chela; tarsus one-third of propodus ; neck short; oviger of 



type I a and 4 femoral gland-tubercles in c? N- PMeri, Loman 



(= iV. antarcticum, Pfeffer) 



21. Number of denticulate spines on oviger exceeding 20 [two terminal palpal segments 



together three-fourths of second segment; femur much enlarged in $] 22 



Number of denticulate spines on oviger less than 20 [and trunk segments 3 and 4 fused] ...23 



22. 6-9 long spinules on each finger of chela, fingers curved, gaping ; palm only as long as high 



[trunk segments 3 and 4 fused] N. rieumayri, n.sp. 



18-25 short, curved spinules on each finger of chela; palm approximately twice as long 



as high ^- articiilare, Hodgson 



23. Two terminal palpal segments together two-thirds of second segment; 18-22 spinules on 



each finger of chela N.villosum, Hodgson 



Two terminal palpal segments together one-half of second segment or rather less 24 



Two terminal palpal segments together one-fourth of second segment; ocular tubercle 



very slender and 4-6 times as high as wide N. bouvieri, n.sp. 



24. Number of spinules on each finger of chela exceeding 30 ; ocular tubercle higher than wide . . .25 

 Number of spinules on each finger of chela less than 20; ocular tubercle low and wide 26 



1 These two species appear to differ somewhat, but each is imperfectly known. 



5-2 



