. /Vi Text-fig. 71. Heteropyramis maculata. A, eudoxid, 'Discovery' St. 129, 950-780 m.; A', diagrammatic transverse section of gonophore, B, C, bract of eudoxid, ' Discovery II' St. 2927, 750-500 m.; D, nectophore, ' Discovery II' St. 2927, 750-500 m. All figures x 15. She supposes that a four-ridged gonophore of Diphyid type (Moser's text-fig. 281) is rotated through 450 on its longitudinal axis and that the right ventral ridge then comes into collision with the stem and divides into two to give a five-angled gonophore. She denied what seems to be the truth that there is present an extra dor
. /Vi Text-fig. 71. Heteropyramis maculata. A, eudoxid, 'Discovery' St. 129, 950-780 m.; A', diagrammatic transverse section of gonophore, B, C, bract of eudoxid, ' Discovery II' St. 2927, 750-500 m.; D, nectophore, ' Discovery II' St. 2927, 750-500 m. All figures x 15. She supposes that a four-ridged gonophore of Diphyid type (Moser's text-fig. 281) is rotated through 450 on its longitudinal axis and that the right ventral ridge then comes into collision with the stem and divides into two to give a five-angled gonophore. She denied what seems to be the truth that there is present an extra dorsal ridge as in Abylinae. Both polygastric and eudoxid stages of Heteropyramis suggest affinities with Chimiphyes and Abylinae. In particular the gonophore has a median dorsal ridge, and the two interesting basal vessels of the phyllocyst not only can be homologized with the pair of basal vessels in the phyllocyst of the peculiarly small bract of Chuniphyes spp. but also with the 'horns' of the phyllocyst of Ceratocymba spp. and other Abylids.
Size: 2604px × 1920px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
