. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. DEVELOPMENTAL PHASES 373 Second calyptopis. Five specimens examined (Fig. 230-c). Length range 1-6-2-0 mm.; average length 1-7 mm. The carapace is unchanged except for its posterior margin which has a small, smooth projection in the middle. The compound eyes and ocular luminous organ are defined, but the median eye is Fig. 23. Nematoscelis megalops. a, second calyptopis, lateral view; b, telson; c, second calyptopis, dorsal view. The first antenna is biramous and has a three-segmented ped
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. DEVELOPMENTAL PHASES 373 Second calyptopis. Five specimens examined (Fig. 230-c). Length range 1-6-2-0 mm.; average length 1-7 mm. The carapace is unchanged except for its posterior margin which has a small, smooth projection in the middle. The compound eyes and ocular luminous organ are defined, but the median eye is Fig. 23. Nematoscelis megalops. a, second calyptopis, lateral view; b, telson; c, second calyptopis, dorsal view. The first antenna is biramous and has a three-segmented peduncle. The inner ramus carries three terminal setae and the outer ramus four. The second segment of the peduncle carries a small spine on its inner, distal margin. The remaining thoracic appendages are the same as in the first calyptopis except that the endopo- dite of the first cormopod now has two segments. In none of the five specimens examined was there any sign of the second thoracic limb. The thorax is clearly segmented. The abdomen has five segments and a telson. The developing uropods can be very clearly discerned within the integument of the telson. The telson now carries seven terminal spines, three pairs of postero-lateral and one pair of 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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