PLATE XV. 



Fig. I. Scala Tydemani n. sp. 



Fig. 2. Scala abyssicola n. sp. a. smaller, b. larger specimen. 



Fig. 3. Scala fragilissima n. sp. a. smaller, b. larger specimen. 



Fig. 4. Scala Nierstraszi n. sp. 



Fig. 5. Rimella Tyleri Ads. a. larger, b. smaller specimen. 



Fig. 6. Teeth of radula of Amphiperas philippinaruni Sow. (seep. 144). 



Fig. 7. Teeth of radula of Gyrineum cuspidaUuii Rve. 



Fig. 8. Teeth of radula of Aviphiperas Angasi (Ads.) Rve, (see p. 144). 



Fig. 9. Teeth of radula of Atnphiperas secale Sow. (see p. 145). 



Fig. 10. Teeth of radula of Calpurnus verrucosus Lin. 



Fig. II. Teeth of radula of Argyropeza dlvina Melv. & Stand. 



Fig. 12. Teeth of radula of Seguensia Melvilli n. sp. 



