Image from page 128 of "Introduction to zoology; a guide to the study of animals, for the use of secondary schools;" (1900) (14761997626)

Identifier: introductiontozo00dave
Title: Introduction to zoology; a guide to the study of animals, for the use of secondary schools;
Year: 1900 (1900s)
Authors: Davenport, Charles Benedict, 1866-1944 Davenport, Gertrude Anna Crotty, 1866-
Subjects: Zoology
Publisher: New York, Macmillan company London, Macmillian and co., ltd.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
largest of all the Crustacea, someindividuals measuring, from tip to tip of the first pair oflegs, 18 to 20 feet. The edible crab is a typical arched crab. It is so calledbecause the carapace is arched in front. The carapace isalso broader than long, and narrower behind than in front. THE CRAYFISH AND ITS ALLIES 109 The legs of this family are short and broad, and in somespecies the posterior pair is especially broad - - an adapta-tion for swimming. These crabsmay be divided into two groups— the burrowing crabs and swim-ming crabs. To the burrowingcrabs belongs the genus Cancer(Fig. 102), which includes theedible crab of Europe, especiallyprized in England, together withseveral American species; whileour common edible, soft-shelledor blue crab, Callinectes hastatus(Fig. 103), and the beautiful lady crab (Fig. 104)belong to the swimming group. Representatives of otherfamilies of crabs are, however, eaten in various localitiesand by various peoples. For example, our little Pinnotheres
Text Appearing After Image:
FK;. 102. - - Panopeus sayi,allied to Cancer. The mud-crab. One-half nat. size.Photo, by W.H.C.P.