. GASTROZOOIDS GONODENDRA t!£"-"v3 LEE BRANCH Text-fig. 14. Physalia physalis. Two views of cormidium VI (main zone) of a young left-handed specimen, number 11, to show stages in the growth of the lateral groups and lee-branches. A = oral view; B = aboral view, x 9-5. 1st group with- out a tentacle, GZ 1 and GON 1; lateral groups, gastrozooids GZ 2-5, gonodendra GON 2-5, tentacles T 2-5. and although his account is difficult to follow without figures, it is a sound analysis of the tripartite groups and their subsidiary lateral branches. Each 'Urgruppe' (Text-fig. 15) consists of one
. GASTROZOOIDS GONODENDRA t!£"-"v3 LEE BRANCH Text-fig. 14. Physalia physalis. Two views of cormidium VI (main zone) of a young left-handed specimen, number 11, to show stages in the growth of the lateral groups and lee-branches. A = oral view; B = aboral view, x 9-5. 1st group with- out a tentacle, GZ 1 and GON 1; lateral groups, gastrozooids GZ 2-5, gonodendra GON 2-5, tentacles T 2-5. and although his account is difficult to follow without figures, it is a sound analysis of the tripartite groups and their subsidiary lateral branches. Each 'Urgruppe' (Text-fig. 15) consists of one polyp (gastro- zooid), one tentacle and one genital cluster (gonodendron), all borne on a single peduncle (PI. XIV, fig. 1). These simple 'Urgruppen' very soon become complicated, said Schneider, by the develop- ment of second, third and fourth ' Urgruppen' on similar peduncles, each arranged on one side of a thickened peduncle and separated from one another by lateral peduncles. Here he was probably referring to the relationship between the first tripartite group of a cormidium and the series (3) which * The significance of these is explained on page 361.
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
