PORCELLANOPAGURUS —BORRADAILE. 
117 
Fig. 8. —P or cell a nopag urus : outer 
view of the great cheliped of 
the specimen shown in Fig. 1, 
X 3. 
ordinary position, and well developed, as a Hunt-ended and sparsely hairy, movable spine. 
The fixed basal spine of the antenna is also present, and is shorter than the exopodite, 
directed almost straight forwards, and provided with several teeth. The mouth-limbs 
(Fig. 7) also show no remarkable features. The molar process of the mandible is fairly 
wide, and the cutting- edge has one low tooth near the 
middle and another at the hinder angle. As in Eupa¬ 
gurus, the outer edge of the endopodite of the maxillule is 
turned forwards. The small process on this edge, which 
perhaps represents the true end of the limb, is directed 
forwards, not backwards as in Eupagurus bernhardus. 
In E. prideauxi it is wanting. The first pair of legs, 
incorrectly figured by Filhol as equal, has been shown 
by subsequent writers to be unequal, the right the 
larger. The hand of this limb (Fig. 8) is much broader 
and heavier than in Eupagurus. The fingers are white-tipped, not spoon-shaped, 
and open nearly vertically. The legs of the second and third pairs are those of an 
ordinary hermit-crab, but rather stouter than usual, and symmetrical. The little 
ridges to which allusion has been made cover them on both sides, and, standing out 
in profile along the anterior edge, make it seem toothed. In fact, only one ridge, 
situated at the end of the carpopodite, is drawn out into a tooth. Under the propodite 
of each leg is a double row of movable spines, 
under the dactylopodite a single row. The 
fourth pair are subchelate as in an ordinary 
hermit-crab, and have the usual scaly patch on 
the palm. The fifth pair are like those of 
Eupagurus (Fig. 9), with a clumsy chela, whose 
fingers are spoon-shaped, lined with hair, and 
finely toothed around the edge. Whitelegge is 
incorrect in stating this limb to be simple in 
P. tridentatus, but the mistake is an easy one to 
make, for when the fingers are closed the 
dactylopodite, hidden among the long hairs at 
the end of the leg, looks merely like a low mound 
upon the tip of the propodite. This leg also 
has the scaly patch by which it is characterized 
in hermit-crabs, only somewhat reduced. 
The gill-formula is the same as that of Eupagurus, consisting of eleven gills on 
each side—five pairs of arthrobranchiae and a pleurobranchia. The gills are pliyllo- 
branchiae. 
The abdomen of the female bears, besides the uropods, three limbs, placed on the 
second, third, and fourth segments (Fig. 5). I make this statement on the evidence of 
Fig. 9.— Eupagurus bernhardus: end. of the 
last leg— a, from the inner side, with 
the chela closed; b, slightly different 
view, with the chela open, X 7f. 
