. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 444 INVEUTEBHATE MORPIIOLOO Y. the pages of books, aud lieuce being known popularly as the Book-scorpion. The cephalothorax is unsegmented, and is followed by a broad flattened abdomen composed of eleven segments. A prseabdomen and a postabdomen, such as can be distinguished ';i the Scorpionida, does not occur, nor is there a terminal poison-spine nor a poison-gland. The chelicene and pedipalps resemble those of the Scor- pions, beiuf.' chelate, and the four succeeding
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). 444 INVEUTEBHATE MORPIIOLOO Y. the pages of books, aud lieuce being known popularly as the Book-scorpion. The cephalothorax is unsegmented, and is followed by a broad flattened abdomen composed of eleven segments. A prseabdomen and a postabdomen, such as can be distinguished ';i the Scorpionida, does not occur, nor is there a terminal poison-spine nor a poison-gland. The chelicene and pedipalps resemble those of the Scor- pions, beiuf.' chelate, and the four succeeding appendages are walking-legs, while the abdomen pos- ^tL sesses no appendages in the adult. Both Si the secon(l and third abdominal seg- ments bear upon their ventral surfaces a pair of stigmata which are the openings of tubular trachetxi which extend througli the body sending otf branches, except in Cherncs, in which bunches of un- brauched tracheae arise from each stig- ma. A heart is present, but consists of Fiu. 202.—Chelifer card- a siniple tube with either a single pair H(?/(/es((:iiviKR). Qf (^ytia near its posterior extremity (Olnshun) or with four ostia {Chernes). The endodermal portion of the digestive tract gives rise to a pair of lateral ctecal diverticula branched at the apex and to one unpaired ventral one. Two eyes are present in Chelifer and four in Ohisium, Avhile they are entirely wanting iu Chernes. The reproductive organs open upon the ventral sur- face of the second abdominal segment, and the opening is surrounded with glands which secreve a fluid which quickly hardens to silky lilaments and serves to fasten the eggs to the abdomen of the parent. These glands are hypodermnl iu origin and correspond to the spinning-glands of the 3. Order Solifugse. The members of this order are characterized by the head- region being separated from a thorax consisting of three ments and bearing the three posterior pairs of legs. TIih abdomen is also s
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
