182 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
6. Small (less than 2.5 em. in extent); large spines on propodus as long as diam- 
eter of joint, widely spaced, on proximal half________-__- rubrum (p. 192) 
[Neck about as long as proboscis (shorter in N. rubrum); joints of palpi rather thick in proportion to 
their lengths; coxae without the prominent lateral spines of N. rubrum; spines on propodus about 
half as long as diameter of joint (Strait of Belle Isle, northward)__._..-__------___- brevitarse Krdyer] 
Medium sized (3 cm. or larger); spines on propodus not so long as diameter 
TET ETT AS ae ee eR 5 pew EUR bates ergs ete ae grossipes (p. 187) 
7. Auxiliary claws less than one-fourth as long as terminal claw_______-____- 8 
Auxiliary claws one-half to two-thirds as long as terminal claw__________-_- 9 
8. Neck short; chelae with more than 25 large spinules on each finger, tips 
POINted 2 0% Asti s HeO Lee eek a ee ete eT stré6mi (p. 190) 
[Neck moderately long; fingers of chelae curved sharply at tips, dactylus blunt or spatulate at tip; 
auxiliary claws more than one-fourth but less than half as long as terminal claw_____- elegans Hansen] 
Neck long, slender; chelae with 25 or less small spinules on each finger; tarsus 
twiceras LOnelas PrOpodlsee 25. a = ee eee ___-longitarse (p. 190) 
(Tarsus slightly longer than but not twice as long as propodus; terminal claw about as long as propodus, 
auxiliary, claws) minute: (Gulfiof St. Iuawrence)sa- 22522535. 5- 2222 bebe sluiteri Hoek] 
9. Hye tubercle low, without eyes; fingers of chelae not conspicuously longer than 
palm, with less than 25 spinules on either finger__giltayi, new species (p. 195) 
Eye tubercle prominent, eyes present; fingers of chelae longer than palm, with 
more than 50 spinules macrum (p. 193) 
a 
PRG = ~ < 0° 5 *, 
in een wees aie ons, 4 
eset BS te x ; ~, 
i, / ~ 
< i V 
‘ 
Bathy metrical 
distribution: 
——— 
\25 FATH'OMS | 
218 )190 j 219 
| 
DISTRIBUTION ¥ NYMPHON: 
V-hirtipes 0-spinosissimum 
X-tenellum 
<| hirtipes 
SPINOSISSITIUM 
tenellum 
wn 
co 
5 He 
on vin wy, 
Figure 9.—Distribution of group A Nymphons. 
(2) 
Dd_o 
GROUP A 
Although the three species in this group resemble one another so 
closely that they have often been confused, their distribution is differ- 
ent. Nymphon tenellum is about half the size of the other species and 
its appendages are more slender in proportion to their lengths. 
Nymphon spinosissimum and hirtipes are thickset-looking animals. 
As can be seen from the accompanying map (fig. 9), the only locality 
from which all three species of this group have been collected is the 
trough between Newfoundland and Nova Scotia, which marks the 
submarine extension of Cabot Strait. 
The occurrence of Nymphon tenellum off Cape Hatteras in 938 
fathoms is the deepest record for any Nymphon in American waters. 
