SOLARIELLA. 327 



to connect it with Gaza. The distinct umbilicus and the absence of 

 a tooth narrowing the mouth separate it obviously from Craspedotus. 

 ( Watson.) 



Philippines, 82 fms. 



Tr. (Margarita) pachychiles WATSON, Journ. Linn. Soc. xiv, p. 

 708 ; Challenger Rep. Gasterop., p. 87, t. 5, f. 11. 



S. DXOPHERUS Watson. PI. 66, figs. 20, 21. 



Shell depressedly conical, rather strong, semitransparent, of a 

 dark pearly iridescence. Sculpture : there are spiral ridges, st rong, 

 five above the base ; the first is close to the suture, and is exquisitely 

 beaded from the middle of the second whorl. The second ridge is 

 remote from the first, and forms a shoulder to the whorls. The third, 

 fourth, and fifth occupy the periphery, which is carinated by the 

 fourth till close up to the mouth, where the fifth forms the carina. 

 Four fine threads, of which the first is partially beaded, lie in the 

 flat between the first and second ridges ; two between the second and 

 third ; one between the third and fourth. Below the fifth ridge is a 

 flat furrow narrower than the rest ; below the furrow is a sixth 

 ridge, slighter than the others ; and then the base is closely covered 

 with eleven spiral threads, which tend to become stronger and wider 

 apart near the umbilicus. The first three ridges alone appear on 

 the upper whorls. Longitudinally the whole surface is sharply 

 scored by the lines of growth. Color a ruddy brownish-white, shot 

 with a purple and green iridescence. Spire depressedly scalar. 

 Apex bluntly mammillated by the somewhat shapeless, round, largish, 

 glassy, ruddy, embryonic whorl. Whorls 4 ?, of rather rapid increase, 

 suture somewhat faint. Mouth oblique, roundish, being slightly 

 peaked above and a little angulated on the pillar. Outer lip sharp 

 but not thin, brilliantly iridescent within. Inner lip very much 

 thickened by a pearly pad, which is very thick below where it 

 envelops what might otherwise have been a tooth on the point of the 

 pillar. The pad is thinner in the middle of the pillar, and thickens 

 again at the junction with the body-whorl, on which it thins out 

 quickly. The lip here is very slightly reflected on the umbilicus. 

 Umbilicus very small and contracted, not so much by the reflection 

 of the inner lip as by the pillar being bent round across it. Oper- 

 culum very thin, yellow, horny, with about eleven very faintly de- 

 fined turns. 



Alt. -28 in. ; diam. 0'37, least O26. Penultimate whorl, 0'08. 

 Mouth, height 0'2, breadth O2, inch. ( Watson.) 



