Discovery reports (1943) Discovery reports discoveryreports22inst Year: 1943 t_j I i i â i .__Jâiâi 0 ⢠5mm Fig. 2. A-C. Amastigia benemunita (Busk). A. From St. WS 85, Falkland Islands. Large lateral basal avi- cularium with part of proximal limb omitted. B. From St. 399, Gough Island. Smallest kind of lateral basal avicularium (cf. A. nuda, fig. D). C. From St. 399. Gough Island. Median basal avicularium at bifurcation. Mandible broken and foreshortened. D, E. A. nuda Busk. St. WS 84, Falkland Islands. D. Lateral basal avicularium. E. Median basal avicularium at bifurcation. Grooves in
Discovery reports (1943) Discovery reports discoveryreports22inst Year: 1943 t_j I i i â i .__Jâiâi 0 ⢠5mm Fig. 2. A-C. Amastigia benemunita (Busk). A. From St. WS 85, Falkland Islands. Large lateral basal avi- cularium with part of proximal limb omitted. B. From St. 399, Gough Island. Smallest kind of lateral basal avicularium (cf. A. nuda, fig. D). C. From St. 399. Gough Island. Median basal avicularium at bifurcation. Mandible broken and foreshortened. D, E. A. nuda Busk. St. WS 84, Falkland Islands. D. Lateral basal avicularium. E. Median basal avicularium at bifurcation. Grooves into which mandibles fit are stippled, r. rootlet. known, this difference is probably not of systematic value. The distal wall of the fertile zooecium of A. gaussi commonly bears a few teeth directed towards the ovicell (Fig. 1 C), but they may be absent, or only represented by a single tooth. Such teeth have not been seen in A. nuda. From his description of the scutum, the spines and the ovicell it is clear that Hasenbank's material from Bouvet Island identified as A. nuda, belonged to A. gaussi. There is some variation in the size of the frontal avicularia of A. gaussi. This is most noticeable in the specimen from St. 167 which has some rather large ones. A fragment from St. 599 has no scuta.
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