PORCELLANOPAGURUS— BORRADAILE. 



117 



Fig. 8. — Porcellanopagunis : outer 

 view of the great cheliped of 

 the specimen shown in Fig. 1, 

 X 3. 



ordinary position, and well developed, as a blunt-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 Eiqjaf/urus bernhardus. 

 In E. jyrideauxi 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 fike 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 phyllo- 



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 hernliardus : end of the 

 last leg — a, from the inner side, with 

 the chela closed; b, slightly different 

 view, with the chela open, x 7i. 



