. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE VltUSTACKA. 406 bear a palp, as do also tlie first niaxillio, it beiuj; in these latter appeudaj^es prolonged into a long slcnider liniblike {nix) structure which is directed dorsally and serves for cleansing the inner surface of the shell. The second niaxilliu are biramous foliate structures, as are also the eight thoracic appendages (/), each of which bears upon its basal joints a platelike epipodite which is respiratory in function. The four anterior abdominal a
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE VltUSTACKA. 406 bear a palp, as do also tlie first niaxillio, it beiuj; in these latter appeudaj^es prolonged into a long slcnider liniblike {nix) structure which is directed dorsally and serves for cleansing the inner surface of the shell. The second niaxilliu are biramous foliate structures, as are also the eight thoracic appendages (/), each of which bears upon its basal joints a platelike epipodite which is respiratory in function. The four anterior abdominal appendages {nb*) are strong biramous swimming-legs, while the two posterior are small and unira- mous. Behind the last appendage-bearing segment are two Kin Fio. 183.—Nebalia Oeoffroyi, Malk (after Claus). rtft* = aUilominal appendage. h = heart. adr = an ten nary gland mx — process of first maxilla. aO = tintennule. am = shell-muscle. «<* = antenna. t = thoracic appendage. te = testis. others without appendages, the terminal one being the telson, the Leptostraca possessing one more metamere than the rest of the Malacostraca. The heart is au elongated organ extending from the maxillary region as far back as the fourth abdominal seg- ment ; it possesses several ostia, and is prolonged anteriorly and posteriorly into aortfe. The antennary gland is present and a rudimentary shell-gland also persists. The lateral eyes are borne upon short stalks. The group contains but few species, the majority belong- ing to the genus Nehcdia (Fig. 183).. 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, bookyear1894
