. Fig. 10. Lepas anslralis {a-f from St. 63). a. Pupa (total length 2-55 mm.), b. Pupa with pri- mordial valves and initial development of peduncle (total length 3-15 mm.), c. Young specimen just leaving the Cypris valves (total length 3-35 mm.), d, e, f. Young specimens with initial development of the calcareous plates (total lengths 3-55, 4'07, and 4-30 mm. respectively), g. Full-grown specimen from St. 212 (total length 64 mm.). h. Carina, i. Carina seen from beneath, j. Scuta, ventral view. L. anatifera sometimes has umbonal teeth on both scuta, but there is yet a difference, for in L. aus
. Fig. 10. Lepas anslralis {a-f from St. 63). a. Pupa (total length 2-55 mm.), b. Pupa with pri- mordial valves and initial development of peduncle (total length 3-15 mm.), c. Young specimen just leaving the Cypris valves (total length 3-35 mm.), d, e, f. Young specimens with initial development of the calcareous plates (total lengths 3-55, 4'07, and 4-30 mm. respectively), g. Full-grown specimen from St. 212 (total length 64 mm.). h. Carina, i. Carina seen from beneath, j. Scuta, ventral view. L. anatifera sometimes has umbonal teeth on both scuta, but there is yet a difference, for in L. australis the scuta are more curved in the umbonal part. It may here be pointed out that these teeth can also disappear during ontogeny, as I have found in some speci- mens from Juan Fernandez Islands. They were described as var. weltneri (Nilsson- Cantell, 1929). But, in typical L. australis, there is no variation in the teeth of the scuta as in L. anatifera. As other good characters for L. australis may be mentioned the very thin plates of the capitulum and the well-developed prongs on the carina.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
