. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Fig. 4. Ophioscolex marionis, a, Part of oral side, b, Part of dorsal side of arm. The dotted arch-lines represent the outline of the vertebrae seen through the exceedingly thin dorsal plates. X15. of a non-viviparous Ophiurid being hermaphrodite, we may, I think, safely con- clude that this species must be viviparous, as the character of the female gonads also indicates. It may be added that no spicules are found in the stomach wall, such as occur in O. niitrix. That this species is not v
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Fig. 4. Ophioscolex marionis, a, Part of oral side, b, Part of dorsal side of arm. The dotted arch-lines represent the outline of the vertebrae seen through the exceedingly thin dorsal plates. X15. of a non-viviparous Ophiurid being hermaphrodite, we may, I think, safely con- clude that this species must be viviparous, as the character of the female gonads also indicates. It may be added that no spicules are found in the stomach wall, such as occur in O. niitrix. That this species is not very closely related to the other Antarctic species of Ophio- scolex, O. mitrix, is evident enough; a comparison of the figures will show the difi^erences in the shape of the buccal shield, ventral and dorsal arm plates, and the mouth papillae, to which may be added the difference in the number of arm spines, one having three, the other four spines, which makes an important difference within this genus. It would appear that the present species is the nearest related to O. quadrispinus, Verrill, from off Nova Scotia; this species is, however, scarcely sufficiently well known to allow the dif- ferences between the two species to be indicated; but it seems that O. quadrispinus has no spines on the 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 Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography of Great Britain; Great Britain. Colonial Office. Discovery Committee. London ; New York : Cambridge University Press
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