. The Cambridge natural history. Zoology. i88 CRUSTACEA EUCARIDA DECAPODA tropical, and extending into the warmer temperate seas. Matuta (Fig. 129) from the Indo-Pacific. Fam. 2. Leucosiidae.—Similar to the above, but the afferent openings to the gill-chambers lie at the bases of the third niaxilli- pedes. Male openings on the sternum. This family contains a great number of forms, with head - quarters in the tropical littoral, but extending into the temperate seas. Ilia in the European seas. /. nucleus (Fig- 130) common in the Mediter- ranean. Ebalia in the Atlantic, North Sea, and Indo - Paci
. The Cambridge natural history. Zoology. i88 CRUSTACEA EUCARIDA DECAPODA tropical, and extending into the warmer temperate seas. Matuta (Fig. 129) from the Indo-Pacific. Fam. 2. Leucosiidae.—Similar to the above, but the afferent openings to the gill-chambers lie at the bases of the third niaxilli- pedes. Male openings on the sternum. This family contains a great number of forms, with head - quarters in the tropical littoral, but extending into the temperate seas. Ilia in the European seas. /. nucleus (Fig- 130) common in the Mediter- ranean. Ebalia in the Atlantic, North Sea, and Indo - Pacific. Leucosia in Indo-Pacific. Fam. 3. Dorippidae.—Cepha- lothorax short and sc|uare. The abdomen is not hidden under the thorax; the antennae are large, and the last two pairs of legs are held dorsally, and have terminal hooked claws. DorijJj^e, littoral in Mediterranean and Indo-Pacific. Cymonomus (Fig. 127) from deep-sea of Atlantic and Mediterranean. Fam. 4. Raninidae.—Similar to Dorippidae, but the cephalo- thorax is elongated, and the legs usually have the last two joints very broad. Several genera, chiefly in the deeper littoral zone. Eanina dentata in the Fig. 130.—Dorsal view of Ilia nucleus. X 1. (From an original drawing pre pared for Professor Weldon.) Tribe 3. Cyclometopa. In these Crabs the carapace is circular rather than square; its frontal and lateral margins are produced into spines and there is no pointed rostrum. The mouth is square, and the third maxillipedes are greatly flattened and form a lid-like expansion over the other oral appendages. This group includes the common Shore-crab of our coasts {Garcinus maenas), the swim- ming Crabs with expanded pereiopods (Fortunus, Liqia, etc.), the Edible Crab (Cancer ]oagurus), and many others. Corystes cassivelaunus is a Crab of doubtful affinities. It is sometimes placed among the Oxyrhyncha, but, as Gurney ^ has ^ Loc. cit. p. Please note that these images are extracted from scanned p
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
