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Zoology Publications from Victoria University of Wellington—Nos. 54 to 57



In the Wellington area eggs of T. melobesia Phillipps, 1927 are laid during spring in clusters of three eggs to several hundred on the under-surface of permanently tide-covered stones. The eggs are oval with a flattened, adhesive base, many oil globules and average 1.65 mm × 1.35 mm. Egg clusters are attended by one parent until hatching. Under laboratory conditions this occurs at 12 days in temperatures of about 15°C. The emergent prolarva is 4.8 mm-5.5 mm standard length and has a prominent yolk sac with a single large oil globule. There are scattered melanophores above the gut and a conspicuous yellow tinge surrounds the brain, extending in the lateral muscle mass to the 8th post-anal somite. Larvae of 6.5 mm-7.85 mm standard length, and more advanced in development, occur in the Island Bay plankton from early September to late December.