472 Mr. V. Bates on New Genera more magnified, to show: — a a a, reticulating lines of large vitreous fibre imbedding minute sexradiates confusedly, running over and covering in part b b, spinous lattice-like fibre imbedding larf/e sexradiates regularly ; c c, puncta indicating microspines on large viti-eous fibre ; d d, minute sexradiates. Diagrammatic. Fiff. 3. The same, minute sexradiate, more magnified, showing that one end is united to the vitreous fi bre : a, minute sexradiate ; b, vitreous fibre. Fiff. 4. The same. Rosette or flesh-spicule, also more magnified. Figs. 3 and 4 are upon the scale of l-48th to 1 -6000th of an inch. Fiff. 5. Farrea dettsa, sp. n. Fragment magnified on scale of l-48th to 1 -1800th of an inch. From deciduous portions, upwards of an inch in diameter, in the detiital mass enveloped by the anchoring-spicLiles of Euplectella cucumer from the Seychelles. Fiff. G. The same. Portion of vitreous fibre of, more mag-nified, to show that the summit of the spines is mucronate : a a, fibre ; bbb, mucronate spines ; c c, mould of sexradiate spicule. Scale l-12th to 1 -6000th of an inch. Fiff. 7. Arahescula parasitica, sp. n., parasitic on vitreous fibre of Aphro-callistes Bocayei : a a, fibre ; b, portion of Arahescula. From the specimen dredged up on board II.M.S. 'Porcupine ' in 500 fathoms, above mentioned ; also from the detrital mass of Euplectella cucumer on the fibre of the foregoing species. Scale about l-32nd to l-6000th of an inch. Fiff. 8. The same. Internal view, showing that there are distinct fronds, a a, with projections, b, on the body and main branches here and there, which appear to have been based upon the fibre on which the Arabescula was parasitic. Fiff. 9. The same. Portion much less magnified, which appears to have become separated from the fibre on which it had been parasitic. Natural size about l-18th of an inch long by l-180th of an inch in widest part. LV. — Descriptions of New Genera and /S^^eczes o/" Heteromera, chiefly from New Zealand and Neiv Caledonia., together with a Revision of the Genus Hypaulax and a Description of an allied New Genus from Colombia. By Feederick Bates. As there is considerable activity just now displayed in the publication of papers descriptive of the coleopterous fauna of New Zealand, I have thought it might be acceptable to give descriptions of all the species of New-Zealand Heteromera contained in my collection that appear to be new to science. I have therewith incorporated a revision, together with descriptions of new species, of my genus Hypaulax and another, allied, new genus (Astathmetus) from Colombia. Of the genus Cilibe (peculiar to New Zealand) I have established twelve species (ten of which are new, the ijhos-2)hu(/oides, White, = elonyata, Breme) and two supposed varieties.
LV.—Descriptions of new genera and species of Heteromera, chiefly from New Zealand and New Caledonia, together with a revision of the genus Hypaulax and a description of an allied new genus from Colombia
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