. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CRUSTACEA. 411 the veutral surface. Arteries pass off from both ends of the heart. Otocjsts are always developed iu the basal joiuts of the autenuules. 3. Suborder J/«(?n/ra. Iu the Macrura the abdomeu ts well developed aud usu- ally as loug as the cephalothorax, aud is provided with its full complenieut of appendages, the sixth pair formiug with the telsou a tail-fiu. Exceptious to these arraugeuieuts oc cur ; lu the Heriuit-crabs, Eupagurus, which inhabit the emp
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CRUSTACEA. 411 the veutral surface. Arteries pass off from both ends of the heart. Otocjsts are always developed iu the basal joiuts of the autenuules. 3. Suborder J/«(?n/ra. Iu the Macrura the abdomeu ts well developed aud usu- ally as loug as the cephalothorax, aud is provided with its full complenieut of appendages, the sixth pair formiug with the telsou a tail-fiu. Exceptious to these arraugeuieuts oc cur ; lu the Heriuit-crabs, Eupagurus, which inhabit the empty .shells of Gasteropod Mol- lusks, the abdomen is gener- ally soft aud uusymmetrical, since it is coiled around the columella of the shell, but terminates in a movable tail- fin which serves, together with the remaining pleopods and the last (and sometimes also the penultimate) pereiopod, wliich is bent dorsally, to re- tain the animal in the shell. The chehB of the anterior pereiopods are generally uu- 0(]ual in size, serving to oc- clude the mouth of the shell, and occasionally the abdomi- Jial a])pendiiges of only one side are develo])ed. In the genus llippa too the abdomeu, though Avith a well-develoi)ed Mild calcified cuticle, it, short, the terminal half being bent M|. under the thorax, the a vorxo/.^r^yir («p, condition characteristic of '''"•" Hhooks); n, Eupayurus biru the Crabs being thus n,,. '""'/"""fn'ri-ki-nks). pioachod. In some fo. ap- t'. andfiftl as Sorqpstt's and er. aent, but more usually all th 1 peren)pods may be rudimentarv or even ab- • i^^S'" 5 eso appendages are well dovel-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McMurrich, J. Playfair (James Playfair), 1859-1939. New York : H. Holt
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
