. Text book of zoology. Zoology. Sub-Glass 2. Malacostraca. Order 6. Decapoda. 227 tail doubles up, and the Crab is henceforth a creeping animal. The Shore Crab {Careinas mcenas) occurs in great numbers on the coasts of England and other parts of Europe. Like other Grabs it is an active, crafty, predaceous animal, which makes strenuous resistance when attacked. The large and broad, thick- sheUed form. Black-clawed Crab or Punger {Cancer pagurus), also lives on English coasts in deeper water. Order 7. Stomatopoda. The Stomatopoda are Malacostraca witli large stalked eyes, with a carapace, and w
. Text book of zoology. Zoology. Sub-Glass 2. Malacostraca. Order 6. Decapoda. 227 tail doubles up, and the Crab is henceforth a creeping animal. The Shore Crab {Careinas mcenas) occurs in great numbers on the coasts of England and other parts of Europe. Like other Grabs it is an active, crafty, predaceous animal, which makes strenuous resistance when attacked. The large and broad, thick- sheUed form. Black-clawed Crab or Punger {Cancer pagurus), also lives on English coasts in deeper water. Order 7. Stomatopoda. The Stomatopoda are Malacostraca witli large stalked eyes, with a carapace, and with a powerful abdomen. The carapace is, however, relatively small, and the four posterior thoracic segments are free, movable, strongly built, and not covered by it. The abdomen is strong, almost straight, with the usual six pairs of appendages, of which the hindmost forms the tail fin, together with the seventh segment, whilst those of the other five pairs are all strong,. Fig. 189. Squilla. VIII eighth thoracic segment; 1, 7 first and seventh abdominal segments; A^, A^ antennae; g gill; Hj, Hj first and sixth abdominal appendages; K^, Kg second and eighth thoracic appendages ; o eye ; S carapace.—After Liitken. swimming feet, coupled together, and bearing on their outer rami, large, branching gills. Of the eight pairs of thoracic limbs, the first five are all prehensile; the last joint can be folded back upon the penultimate. The second pair is specially well developed. The last three pairs of thoracic appendages are feeble walking legs. The Stomatopoda do not carry their eggs about. The young animal passes through a metamorphosis, the first stages of which are not accurately known. The more advanced larvse are delicate and transparent, but otherwise very like the adult; they are characteristic members of the pelagic fauna. The group, which includes relatively few and fairly uniform members, belongs to warm seas. A noteworthy species, Squilla mantis, is found on English co
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
