. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 291 the parasite. In the sections the ovary does not appear to be degenerated, though the eggs have remained comparatively small. A section of the lower part of the organ of fixation of the same specimen is shown in Fig. qb (p. 299). The cuticle of the organ of fixation in many parts is rather strongly wrinkled. The sieve plate is more or less convex, and contains a great number of openings. Irregular protoplasmatic excrescences are protruding through the sieve plate; in some parts
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. ELLOBIOPSIDAE 291 the parasite. In the sections the ovary does not appear to be degenerated, though the eggs have remained comparatively small. A section of the lower part of the organ of fixation of the same specimen is shown in Fig. qb (p. 299). The cuticle of the organ of fixation in many parts is rather strongly wrinkled. The sieve plate is more or less convex, and contains a great number of openings. Irregular protoplasmatic excrescences are protruding through the sieve plate; in some parts these excrescences themselves are covered with a cuticle. (2) Specimen on E. vallentini from St. WS 770 (PI. XXXIX). The section gives a distinct view of the various parts of the parasite. The organ of fixation is more or less panduriform, as its ovoid internal part is connected by a rather narrow neck to the again broadening external part. From the latter the basal parts of a number of trophomeres take their origin. The section shows several groups of gonomeres. Fig. 2. Amallocystis fagd Boschma on Eiiphausia vallentini Stebbing from St. 892. Transverse sections anterior region than b. Letters as in Fig. i. x 80. of host, a from a more spreading in all directions. At the underside of the organ of fixation the sieve plate is visible; through this plate some protoplasmatic excrescences often of considerable length are seen to protrude into the ovary of the host. In this specimen again the ovary shows no obvious signs of degeneration. The developing eggs seem to be of normal appearance. (3) Specimen on E. vallentini from St. 892 (Fig. 2). The chief details of two sections, separated by a distance of 40//, are given in the figure. One section (b) shows the rather narrow neck connecting the internal and the external parts of the organ of fixation. The external part at its top divides into trophomeres which extend in various directions. The lower part of the organ of fixation shows
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