. Bulletin of the British Museum (Natural History) Zoology. 64 LOISETTE M. MARSH & ANDREW R. PRICE. Fig. 2 Paraferdina laccadivensis, a, abactinal view (BMNH 1990. , R/r = 36/12 mm); b, abactinal surface, denuded (WAM 77-90, R/r = 33/11 mm). description and figures. N. frianti differs from N. mamillifera Livingstone, 1930 principally in the disposition of the actinal plates. In N. frianti they are poorly developed and never extend to more than half the arm length. Frequently the series consists of a few plates at the base of the ray with a few more small plates between the large infe
. Bulletin of the British Museum (Natural History) Zoology. 64 LOISETTE M. MARSH & ANDREW R. PRICE. Fig. 2 Paraferdina laccadivensis, a, abactinal view (BMNH 1990. , R/r = 36/12 mm); b, abactinal surface, denuded (WAM 77-90, R/r = 33/11 mm). description and figures. N. frianti differs from N. mamillifera Livingstone, 1930 principally in the disposition of the actinal plates. In N. frianti they are poorly developed and never extend to more than half the arm length. Frequently the series consists of a few plates at the base of the ray with a few more small plates between the large inferomarginals which abut the adambulacrals. If a second series is present at all it consists of a very few plates in the arm angle. In N. mamillifera the actinal plates are well developed with two or more rows at the base of the ray. The main series extends to about two thirds of the arm length with plates nearly as large as those of the inferomarginals in some specimens. Both species have alternating large and small superomarginal plates. N. frianti and N. mamillifera cannot therefore be considered synony- mous, as suggested as a possibility by Clark and Rowe (1971). 10. Nardoa galatheae (Liitken, 1864) See. Clark & Rowe, 1971: 36, 64. Material. 810213A/1 (WAM 572-89), 810428B/4 (BMNH ). Collection sites. Tangalla, Sri Lanka (1 specimen, R/r = 69/ 12 mm); S. Ug Bau, Pula We, Sumatra (1 specimen, R/r = 140/17 mm). Habitat and depth. On rock, 3-20 m. Remarks. The smaller specimen (apart from having six rays) is indistinguishable from individuals from north-western Australia, which have convex abactinal granules, while the large one has much less convex granules, similar to others of comparable size from the Moluccas. Since one of the latter has a regenerating arm with more convex granules, as found in the smaller specimen, it appears that the more convex shape of the granules is a juvenile character. 11. Neoferdina cumingi (Gray, 1840) See. Clark & Rowe, 1971:
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