GIBBULA. 215 



thin calcareous layer overlying the nacre. Spire high, a little 

 scalar. Apex small and sharp. Whorls 8, of regular increase, a 

 little rounded, angulated at the carina, rather tumid on the base, 

 with a wide umbilicus. Suture angulated and well denned, but a 

 little filled up by the carina of the overlying whorl. Mouth (ap- 

 parently) perpendicular, semioval. Outer lip well rounded. Pillar- 

 lip a little bent over on the umbilicus, and then advancing rather 

 straight toward the left, angulated and slightly toothed at the point 

 of the base when the umbilical beaded thread joins it. Umbilicus 

 a wide deep funnel, with a deep spiral staircase at the junction of 

 the whorls. Alt. 0.68 inch ; diam. 0.72, least 0.61 inch. 



This beautiful species is unfortunately present in only one dead 

 and chipped specimen. The name given to it is expressive of the 

 singular beauty of its sculpture. It is more like Trochus magus, L., 

 than any other species I know, but is obviously very different in all 

 details of form and sculpture. It has some resemblance to Trochus 

 ottoi Phil., but is higher and narrower; that species has a broadly 

 open but immediately contracted umbilicus, which rather resembles 

 a scoop than a funnel; its whorls are much less tumid above, and 

 are less sculptured ; they slope downwards conically, from the 

 suture with only one feeble and feebly tubercled thread between the 

 suture, to which it lies near, and the peripheral thread. (Watson.) 



Off Sydney, 410 fins. 



T. glyptH* WATSON, Journ. Linn. Soc. London, xiv, p. 694; 

 Challenger Gasterop., p. 75, t. 6, f. 6. 



_B. /Species of Indo-Pacific and Australasian Seas. 



G. PICTUKATA Adams et Angas. PI. 37, figs. 28-30 ; pi. 30, fig. 7. 

 Shell small, narrowly umbilicate, conical, excessively variable in 

 coloration, the following patterns most usual; (1) whitish with 

 longitudinal broad or narrow red or crimson flames reaching to the 

 periphery, the ground-color and base dotted with red ; the flames 

 are frequently interrupted in the middle by a dotted zone ; (2) 

 ground-color clear yellowish or whitish, the lirse dotted with red ; 

 this pattern frequently shows short flames of red under the sutures ; 

 (3) entire surface purplish black, the umbilicus green-tinged. Except 

 the last variety, all are whitish around the umbilicus ; in all, the in- 

 side of the umbilicus and the columella are tinged with green. 

 Spire elevated, conical, rather obtuse ; sutures impressed ; whorls 5 

 to 6, convex, encircled by line, usually 5 or 6 in number on the 



