. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CRUSTACEA. 405 witli the f the seg- Folds of B are fre- Dccnrs. tteth aud eyes are is beloug- ths of the imeutary. re always the sixth peiidages lally well Biitary or ; to this lie Euto- sr 50 cm. J egg as a d before it a later in Some ;, in fact , pre sen t- d aud to the two 1 possess i with an unpaired e-jointed ,te flagel- landil'os bear a palp, as do also the first maxilhe, it being in these latter appendages prolonged into a long slender limblike {m
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CRUSTACEA. 405 witli the f the seg- Folds of B are fre- Dccnrs. tteth aud eyes are is beloug- ths of the imeutary. re always the sixth peiidages lally well Biitary or ; to this lie Euto- sr 50 cm. J egg as a d before it a later in Some ;, in fact , pre sen t- d aud to the two 1 possess i with an unpaired e-jointed ,te flagel- landil'os bear a palp, as do also the first maxilhe, it being in these latter appendages prolonged into a long slender limblike {mx) structure which is directed dorsally and serves for cleansing the inner surface of the shell. The second maxillfo are biraraous foliate structures, as are also the eight thoracic appendages {t), each of which bears upon its basal joints a platelike epipodite which is respiratory in function. The four anterior abdominal appendages {ah*) are strong biramous swimming-legs, while the two posterior are small aud unira- mous. Behind the last appendage-bearing segment are two sm nix. Fig. 1%^.âNehalia Oeoffroyi, Male (after Clacs). ab* = abdominal appendage. Ji = heart. adr = antennary gland mx = process of first miixilla. ae = antennule. sm = shell-muscle. a(^ = antenna. t = thoracic appendage. te = testis. others without appendages, the terminal one being the telson, the Leptostraca possessing one more metaraere than the rest of the Malacostraca. The heart is an elongated organ extending from the maxillary region as far back as the fourth abdominal seg- meut; it possesses several ostia, and is prolonged anteriorly iiiid posteriorly into aortre. The antennary gland is present aud 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 Nehidia (Fig. 183). Mil,. â¢llir â »â¢. 1% â I? â¢iS;: â Please note that these images are extracted from scanned page image
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
