TRANSACTIONS OF THE SAN DIEGO SOCIETY OF NATURAL HISTORY Volume 19 Number 12 pp. 169-179 10 April 1980 Four species of Pterynotus and Favartia (Mollusca: Gastropoda: Muricidae) from the Philippine Islands Anthony D'Attilio and Hans Bertsch Abstract. Four species of muricid gastropods from the Philippine Islands are discussed and fig-ured. Three of the species are described as new. Introduction During the past several years collectors and fishermen in the Philippines have obtained many new or otherwise interesting specimens of marine mollusks. Some of this valuable material has been given by collectors and dealers to museums in this country for study and identification, resulting in the publication of several new taxa (see Emerson & D'Attilio, 1979). Through the courtesy of several shell dealers cited below, we have recently ob-tained for the collection of the San Diego Natural History Museum specimens of 4 species of muricid gastropods. These were obtained mostly by native Philippine fish-ermen using tangle nets laid out overnight in depths of 150 metres and less. One of these species was recently described by Dr. Kosuge in a new Japanese journal devoted to malacology; the other 3 are new species we describe herein. Muricidae Rafinesque, 1815 Muricinae Rafinesque, 1815 Pterynotus Swainson, 1833 Type species Murex pinnatus Swainson, 1822 (^Purpura alata Roding, 1798) by subsequent designation, Swainson, 1833 (text to plate 122). The genus Pterynotus encompasses Muricinae shells having 3 or more varical flanges or flanges developing into spines. Several subgenera have been proposed for this genus, especially by Jousseaume, 1880. These subgeneric taxa have been variously accepted or rejected or at times raised to full generic rank. The present species are referable to Pterynotus sensu stricto based on their alate trivaricate morphology and dentate labrum (as in the generic type species). A variable characteristic of the genus is the presence or absence of denticles on the columella. The new species described here as Pterynotus aparrii has columellar denticles, whereas Pterynotus miyokoae lacks denticles. Pterynotus miyokoae Kosuge, 1979 (Figures la, b, c, d) Original reference. — Pterynotus miyokoae Kosuge, 1979, pp. 1-2, pit. 1, figs. 1-7. Supplementary description. — The shell of the largest specimen we examined is 67 mm high, broadly fusiform, protoconch of Wi polished rounded whorls; spire of mod-erate height, strongly convex and possessing 7 whorls; suture deeply impressed. The
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