SOLARIELLA. 319 



T. (Margarita) clavatus Watson, Journ. Linn. Soc. Lond. xiv, p. 

 "705 ; Challenger Rep. Gasterop., p. 82, t. 5, f. 8. — Solariella wgleis 

 var. clavata Watson, Dai-l, Bull. M. C. Z. xviii, p. 380. 



8. iNFUNDiBUiAiM Watson. PI. 66, fig. 97. 



Shell conical, with a tumid base, carinated, umbilicated, thin, 

 translucent, pearly. Sculpture : spirals on the upper whorls 2, on 

 the body whorls 7-8, pretty strong, but fine beaded threads. The 

 first lies remote below the suture, and is sparsely ornamented by 

 longitudinally produced, high and pointed, tubercles ; it forms a 

 shoulder on the whorl. The second projects strongly and shai'ply 

 at the ])eriphery and forms the carina; it and those below are 

 delicately fretted with close-set small beads. The third, which 

 meets the outer lip, lies within the contraction of the base. The last 

 two are closer than the rest, which, however, are sometimes brought 

 closer by the additional thread which appears among them. The 

 one which defines the umbilicus is more sharply beaded than the 

 rest. Longitudinals — below the suture and near the umbilicus tlie 

 surface is sharply but delicately puckered, and these puckerings, 

 strong in the early whorls, are in the later faintly continued across 

 the whorls as lines of growth. Color yellowish white, with a brill- 

 iant nacreous sheen shining through the thin superficial calcareous 

 layer, which becomes more opaque in drying. Spire high, scalar. 

 Apex minute, flattened, with the minute bulbous embryonic li whorl 

 projecting on one side. Whorls 8, of rapid increase, rounded, but 

 angulated by the projection of the spirals, very tumid on the base. 

 Suture linear, but strongly defined by the contraction of the 

 suprajacent whorl and the flat shoulder of the one below. Mouth 

 very slightly oblique, round, but on the pillar flattened, and at the 

 point of it angulated slightly, nacreous within ; across the body 

 there is no pad, but the shell is eroded, and this erosion has the 

 appearance of a thin callus. Outer lip thin, not descending. 

 Pillar-lip slightly patulous, l)ending flatly over the umbilicus, and 

 then advancing in a straight line to the point of the pillar, where it 

 is slightly angulated just where the beaded umbilical s])iral ends. 

 Umbilicus funnel-shaped, rather open, but a good deal contracted 

 within. Sharply scored with the lines of growth. Operculum 

 yellow, horny, very thin, of 7 to 8 whorls. 



Alt. -81 in., diam. -65, least 0'59. Mouth, height 0-37, breadth 



0-35 in. ( Watson.) 



