. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CCELENTERA. 101 {L aa)o. I ue Z^,-n«na) of adhesion. The depression, ol the subumbrellar surface, the funnels (/), are verj deep in Lucermxria, extending almost to the summit of the bell. 2. Order Peromedusae, In this order the adult medusu3 are always free-swimmin^. and are characterized by the bell being pointed in shape and about Its middle marked with a distinct constriction The IS obliterated at only four points, as in Tessera, Hud they difler f
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE CCELENTERA. 101 {L aa)o. I ue Z^,-n«na) of adhesion. The depression, ol the subumbrellar surface, the funnels (/), are verj deep in Lucermxria, extending almost to the summit of the bell. 2. Order Peromedusae, In this order the adult medusu3 are always free-swimmin^. and are characterized by the bell being pointed in shape and about Its middle marked with a distinct constriction The IS obliterated at only four points, as in Tessera, Hud they difler from the Stauromedusje bj possessing four sense-organs, the four interradial tentacles of the i^rimury .series of eight becoming modified to form these structures, while the radial â¬ue;s retain their original character. 3. Order Cubomedusse. This order, of which CJiaryhdea (Fig. o3) is a typical example, is characterized by the bell being of a cubical shape. The interradial obliterations of the Cd'leuteron are linear, and, as in the pre- ceding order, four of the primary teu- taclos, these being the only ones which tlevelop, are modified to form seuse- or^'uns. In this order, however, it i^Y^o.^^.-CkaryMeamar^ tlie lour radial tentacles which form tiie â¢â "/;»â¢'«//.'u,^u8,. seuso-organs {so), the Tour interradial per- "^ = scuse-orguu. sistiiig as tentacles {t). ' = tfiiiacle. 4. Order DiscomedusBB. I., this order, which includes the maiority of the known S(Tphomedusa^ all the eight priinary ten'.., '.s are converted sense-organs, a number of secondary tentacles usuallv <levoloping at the margin (Fig. 54). The prinmry intenadial -umcious of the cu^ienteron do not develop, but on the "HT hand secondary obliterations frequently make their. 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 r
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
