. A manual of zoology. Zoology. FlG. 476.âN/jtnp]i<in i^tixryni, 'â ((jrii^.). r, clielioerif : r, rostrum. ovigerous legs; p, pedipalpi ; bcr not reached in any arachnid. Diverticula of the stomach extend into the legs ; a heart is present, but respiratory organs are lacking. The Pycnogonids, which creep slowly over seaweeds and hydroids, may be il) a distinct group of artliroproda, or (2) modified arachnids, or (3), and less probable, Crustacea. Nijinpliou* PhoxicTiiUdiuDi* Colossendeis.* Class III. Malacopoda (Protracheata). These forms, inclfiding only a single family ;, show
. A manual of zoology. Zoology. FlG. 476.âN/jtnp]i<in i^tixryni, 'â ((jrii^.). r, clielioerif : r, rostrum. ovigerous legs; p, pedipalpi ; bcr not reached in any arachnid. Diverticula of the stomach extend into the legs ; a heart is present, but respiratory organs are lacking. The Pycnogonids, which creep slowly over seaweeds and hydroids, may be il) a distinct group of artliroproda, or (2) modified arachnids, or (3), and less probable, Crustacea. Nijinpliou* PhoxicTiiUdiuDi* Colossendeis.* Class III. Malacopoda (Protracheata). These forms, inclfiding only a single family ;, show a strange mixture of annelid and arthropodan (or ' traeheate'). Fio. 477.â7Vn'(OTh(,s i;ijinisis. (From Kalfour, after M cliaracters, so that they are usually regarded as representatives of the stock, early separated from the annelids, fron: which the Insecta luivo descended. They recall the annelids by the iireseuce of lu^pliridia, so characteristic of that group, which begin by a closed vesicle (reduced ctelom), pursue a short conrse, and expand into a urinary bladder before o]iening at the bases of the legs (tig. 478, .so). On the other hand they possess trachea', long nnbranched. 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
