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698 L. A. BORRADAILE.2. 6th alxloniinal limb, when present, has the branches neither broad nor styliform but adaptedfor holding the body into hollow objects. Pleura very rare. Abdomen nearly alwaysasymmetrical and either soft and twisted, or bent under the thorax. Paguridea.Key to tlie subtribes of the Paguridea.I. Abdomen stiaight or twisted. Carapace 6rm and more or less compressed in the fore part,soft in the hinder part. Fourth pair of legs unlike the third. Rostrum almost or quitewanting. Pagurinea.II. Abdomen bent under the thorax. Body crab-like. Carapace firm all over. Fourth pair oflegs like the third. Rostrum spiniform. Lithodinea.EXPLANATION OF PLATE XLVILFig. L Huenia proteus, male of triangular shape; a. whole animal, b. part of the fine gravingof the back,greatly magnified.Fig. 2. Huenia j)roteus, female.Fig. 3. Naxioides spinigera, male ; a. whole animal, b. outside of hand, c. hooked hairs of twodifferentshapes.Fig. 4. Halimus espiiiosus, male ; a. whole animal, b. outside of hand, c. end-joint of a walking leg,d. hooked hairs.Fig. 5. Lambrus (^Rhinolambrus) turriger ; a. whole animal, b. part of under side to show groovesfor breathing stream. 1. endopodite of 3rd maxilliped, 2. exopodite of the same, 3. base ofepipodite of the same, covering opening to gill-chamber, 4. ridge on under side of body (notouter edge), 5. outer end of inner groove, 6. outer end of outer groove, 7. inner groove, 8. foreedge of mouth.Fig. 6. Lambrus {Aulacolambrus) sculptus ;part of inner groove corresponding to (7) in fig. 5,showing the covering of hairs.