. Fig. io. A. Notoplites vanhoffeni (Kluge). St. TN 348, McMurdo Sound. One zooecium to show scutum with 'islands'. Part of the ovicell of the proximal zooecium is also shown. B. N. vanhoffeni (Kluge). St. TN 339, Ross Sea. To show branched internal spines and differences in orifice from N. drygalskii (cf. Fig. 9 A). C. N. antarcticus (Waters). St. 39, South Georgia. Ovicell and adjacent structures. The scutum is not normal, cf. normal scutum shown in Fig. 9 D. c. cryptocyst, internal spine, o. ovicell. The ovicells of N. vanhoffeni are always sculptured, those of N. drygalskii are usuall
. Fig. io. A. Notoplites vanhoffeni (Kluge). St. TN 348, McMurdo Sound. One zooecium to show scutum with 'islands'. Part of the ovicell of the proximal zooecium is also shown. B. N. vanhoffeni (Kluge). St. TN 339, Ross Sea. To show branched internal spines and differences in orifice from N. drygalskii (cf. Fig. 9 A). C. N. antarcticus (Waters). St. 39, South Georgia. Ovicell and adjacent structures. The scutum is not normal, cf. normal scutum shown in Fig. 9 D. c. cryptocyst, internal spine, o. ovicell. The ovicells of N. vanhoffeni are always sculptured, those of N. drygalskii are usually smooth, but occasionally ( from St. TN 331) there are little papillae on the ento- oecium giving the ovicell a sparsely punctate appearance (Fig. 9 B). The frontal avicularia vary in size, and there is some variation in the pattern of the scutum. In N. drygalskii there may be " granulation " as in Kluge's specimens or these markings may be larger and more irregular as in the specimen figured (Fig. 9 A). In either case they appear to be interruptions, "islands" one might call them, in the lumen, not granulations of the surface of the scutum. In N. vanhoffeni the lumen is less ex-
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