Descriptions of New Taxa of Eulimidae (Mollusca, Prosobranchia), with Notes on Some Previously Described Genera

Eleven new genera and 17 species are described, with one exception parasites on echinoderms: Trochostilifer gen. n. with T. domus sp.n. (type species) (Philippines) on Stylocidaris efftuens, T. mortenseni sp.n. (New Caledonia) on Prionocidaris australis and T. slriatus (Hedley) on P. baculosa annulifera; Ophioarachnicola biformis gen. et sp.n. (Solomon Is.) on Ophio-arachna incrassata; Hemiliostraca sloani sp.n. (Aldabra I.) on Ophiomyxa australis; Robil-lardia solida sp.n. (Loyalty Is.), host unknown. Ersilia Monterosato is transferred from Lacunidae to Eulimidae, E. stancyki sp.n. (Florida) is a parasite of Ophiolepis elegans. Hyper-mastus echinodisci sp.n. and H. sauliae sp.n. (both Borneo) are parasitic on Echinodiscus bisperforatus; Monogamus parasaleniae sp.n. (Tonga I.) on Parasalenia gratiosa. Scalari-balcis gen.n. is erected for Mucronalia angulata Mandahl-Barth. Concavibalcis scalaris gen. et sp.n. is described from the Philippines, host unknown. Echiuroidicola cicatricosa gen. et sp.n. (Malaysia) is a parasite on the echiuroid Ochetostoma erythrogrammon. Peasistilifer gen.n. (type species Mucronalia nitidula Pease) is erected for a group of holothurian parasites. Prostilifer gen.n. is erected for Eulima subpellucida Pease, parasitic on Pacific holo-thurians. Paramegadenus scutellicola sp.n. (Pacific) is parasitic on Stellaster incei, P. incerta sp.n. on an Australian starfish. Asterolamia hians gen. et sp.n. is described from Astropecten indicus and A. cingulata from Craspidaster hesperus, both Pacific. Microstilifer gen.n. is erected for Stilifer auricula Hedley. Vitreobalcis gen.n. is erected for Apicalia holdsworthi H. Adams, a parasite of Mespilia globulus and V. laevis sp.n. (from Synaptula purpurea, Australia) is provisionally placed here. Luetzenia asthenosomae gen. et sp.n. (Australia) and L. toki Habe are both parasites on Asthenosoma.