Genus agreeing with Gloioderma in vegetative structure, but having tetrasporangia collected into somewhat raised and differentiated nemathecia. G. setchellii sp. nov. Plate 38, Figs. 4–6; Plate 39, Figs. 15–16. Frons erecta, plana, solida, rubelliana, nitens, aliquantum cartilaginea, fragilis, dichotoma, 6–14 cm. alta, 3–14 mm. lata, segmentis linearibus, divisionarum principum basi versus cuneatis, imminentibus, interconnexis, apicibus axilibusque rotundatis, marginibus integris vel marginaliter proliferatis, processis peranguste-linearibus, horizontalibus demum foliosis; medulla cellulis magnis, ellipsoideis, decoloratis, 2–3 stratis; cellulis zonae intermediae nonnullis stratis, minoribus; cellulis zonae anterioris aliquantum latae, minutis, arte confertis, assimilativis, seriebus anticlinis; filamentis interstitialibus texti interioris abessentibus; tetrasporangiis cruciatis, in aliquantum elevata inconspicuaque nemathecia aggregatis, super superficiem frondium plus minusve sparsa; cystocarpiis conspicuis, numerosis, marginalibus, sessilibus, cornutis; sporarum massa texto reticulato circumdata. Frond erect, flat, solid, reddish, shiny, somewhat cartilaginous, brittle, dichotomous, from 6–14 cm. high and 3–14mm. wide, segments linear, cuneate towards the base of the main divisions, overlapping, interattached, axils and tips rounded, margins entire or proliferated marginally with very narrow-linear, horizontal processes later becoming foliose; structure of an inner tissue of 2–3 rows of large, ellipsoidal, colourless cells, an intermediate zone of several rows of smaller cells bounded by a rather wide outer zone of minute, closely-packed assimilative cells in rows perpendicular to the surface; interstitial filaments in inner tissue absent; tetrasporangia cruciate, collected into somewhat raised and inconspicuous nemathecia dispersed more or less over the whole surface; cystocarps conspicuous, numerous, marginal, sessile, horned, pericarpium with sporemass surrounded by reticulate tissue. Type specimen No. 558, Herb. Lindauer; specimens distributed in Lindauer, Algae Nova-Zelandicae Exsiccatae, Fasc. V, No. 121. Named in honour of the late Professor W. A. Setchell. G. setchellii when fresh is firm, brittle and opalescent, but is not lubricous. On drying it is shiny and cellophane-like, and the older parts do not adhere to the paper. Habitat: Bay of Islands; sublittoral, often attached to Lithothamnion. Most plentiful from January to August. Ceramiales Fam. ceramiaceae Euptilota Kuetz. Euptilota mooreana Lindr. sp. nov. Plate 38, Figs. 13–14; Plate 40, Fig. 19. Frondes epiphyticae, partibus juvenilibus roseae, partibus vetustioribus rubro-purpureis, ad 20 cm. altae, cartilagineae, 2–4-pinnatae, distichae, axi principe percurso, filiforme, sectione elliptico, translucido, corticato, sursum evidenter articulato, ramulis alternis, spatio 1–2 mm. regulariter dispositis, patentibus, conspicue distichis, plerumque 1 mm. vel nonnullis mm. longis, aliquibus longioribus, paucis in