The Atoll of Funafuti, Ellice group : its zoology, botany, ethnology and general structure based on collections made by Charles Hedley of the Australian Museum, Sydney, N.S.W.
Triforis Incisus, Pease. — (Fig. 33)
Triforis Incisus, Pease.
Tryon, loc. cit., p. 190, pl. xxxix., fig. 65.
Pease described T. incisus from Hawaii.* I have collected at Port Moresby, British New Guinea, what seems a form of that described above. It differs in colour being variegated with black, chocolate and white. The uppermost ridge has not the same disposition to become beaded but longitudinal plications are developed in the interstices. The protoconch in these Papuan shells is six whorled, bicarinate and crossed by coarse bars., like the apex I figure for T. obesula.
* Pease—Proc. Zool. Soc, 1860, p. 434.