. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 301 B. THE SPECIMEN ON HOPLOPHORUS NOVAE-ZEELANDIAE DE MAN The specimen is attached to the ventral surface of the abdomen of its host, and the external part protrudes through the integument joining the first and second abdominal segments. The parasite was examined externally only, but the pleurae of the left first and second abdominal segments were removed to obtain a better view of the parasite. In the side view of the external parts of the parasite (Fig. lib) the pleurae are repr
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 301 B. THE SPECIMEN ON HOPLOPHORUS NOVAE-ZEELANDIAE DE MAN The specimen is attached to the ventral surface of the abdomen of its host, and the external part protrudes through the integument joining the first and second abdominal segments. The parasite was examined externally only, but the pleurae of the left first and second abdominal segments were removed to obtain a better view of the parasite. In the side view of the external parts of the parasite (Fig. lib) the pleurae are represented to show the situation of the parasite in regard to its host. In the figure approximately 100 trophomeres with their gonomeres are visible. If we assume that about one- fifth of the whole number of trophomeres is visible here, the total number amounts to 500, a considerably smaller number than that of the type specimen. As in the latter the trophomeres are united in tufts that with usually long stalks originate from a common centre. The whole external mass in side view has a larger diameter of about 5 mm., and a height of about 2 Fig. II. Amallocystis umhellatus , specimen on Hoplophorus novae-zeelandiae De Man. a, tuft of stalks with trophomeres and gonomeres; b, external part of parasite in situ on host, c, carapace; I, first abdominal segment; II, second abdominal segment; III, third abdominal segment, x 15. Fig. 11 a represents a single tuft of trophomeres and gonomeres. As a rule each trophomere bears three gonomeres, which are of a globular shape except the distal gonomere which is usually slightly more elongated. The diameter of the gonomeres varies from 140 to 195//. They are, therefore, slightly smaller than those of the specimen on Hoplophorus grimaldii, but in all other respects the external part of the two parasites is quite similar. The host of the type oi Amallocystis umbellatus, a specimen oi Hoplophorus grimaldii Coutihre, appears to be a female
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