{ GROUP OF SPECIMENS OF THE GOOSE BARNACLE } { (_Lepas anatifera_), ONE SHOWING THE CIRRI } { EXTENDED AS IN LIFE. NATURAL SIZE. } III. { (_From Brit. Mus. Guide_) } 42 { } { GROUP OF A COMMON SPECIES OF ACORN-SHELL OR ROCK } { BARNACLE (_Balanus balanoides_). NATURAL SIZE } IV. _Penæus caramote_, FROM THE MEDITERRANEAN. ABOUT HALF NATURAL SIZE. (_From Brit. Mus. Guide_) 57 V. THE COMMON SPINY LOBSTER (_Palinurus vulgaris_). MUCH REDUCED. (_From Brit. Mus. Guide_) 59 VI. _Munida rugosa._ BRITISH. REDUCED 60 VII. THE COMMON HERMIT CRAB, _Eupagurus bernhardus_, IN THE SHELL OF A WHELK. REDUCED. (_From Brit. Mus. Guide_) 62 VIII. THE "NORTHERN STONE CRAB," _Lithodes maia_. MUCH REDUCED. THE LAST PAIR OF LEGS ARE FOLDED OUT OF SIGHT IN THE GILL CHAMBERS. (_From Brit. Mus. Guide_) 63 { THE COMMON SHORE CRAB (_Carcinus mænas_). REDUCED } IX. { } { _Dromia vulgaris_, CARRYING ON ITS BACK A MASS OF } 68 { THE SPONGE, _Clione celata_. BRITISH. REDUCED } X. _Calappa flammea._ BRAZIL. REDUCED 72 XI. THE GIANT JAPANESE CRAB, _Macrocheira kæmpferi_. MALE. THE SCALE OF THE FIGURE IS GIVEN BY A TWO-FOOT RULE PLACED BELOW THE SPECIMEN. (_From Brit. Mus. Guide_) 76 XII. _Squilla mantis_, FROM THE MEDITERRANEAN. ABOUT ONE-HALF NATURAL SIZE. (_From Brit. Mus. Guide_) 82 { A SWIMMING CRAB, _Portunus depurator_. BRITISH. } { REDUCED } XIII. { } { A SPIDER CRAB, _Maia squinado_, DRESSED IN FRAGMENTS } 96 { OF WEEDS. BRITISH. REDUCED } { _Corystes cassivelaunus._ MALE (ON LEFT) AND FEMALE } { (ON RIGHT). BRITISH. REDUCED } XIV. { } 100 { _Albunea symnista_, ONE OF THE HIPPIDEA. INDIAN } { SEAS. REDUCED } { _Ocypode cursor._ WEST AFRICA. REDUCED } XV. { } { _Gelasimus tangeri._ MALE ABOVE, FEMALE BELOW. } 104 { WEST AFRICA. REDUCED } XVI. A DEEP-SEA HERMIT CRAB, _Parapagurus pilosimanus_, SHELTERED BY A COLONY OF _Epizoanthus_. FROM DEEP WATER OFF THE WEST OF IRELAND. SLIGHTLY REDUCED 124