SOLARIELLA. 325 



carina, of which the basal one meets the outer lip ; the upper and 

 stronger angulates the whorl about two-fifths from the base ; less 

 than one-fifth from the suture is a shoulder formed by a row of 

 stronger remoter tubercles scarcely connected by a thread. On the 

 base are two feebly beaded threads, another strongly beaded defines 

 the umbilicus, close within which lies another delicately and re- 

 motely beaded. Longitudinals the top whorls are strongly ribbed, 

 but farther down these ribs break into tubercles and become dis- 

 connected ; but traces of these longitudinals remain here and there. 

 The lines of growth are very faint. Color white, with a pearly 

 luster. Spire high, scalar. Apex not fine, rounded, with the 

 inflated 1] embryonic whorl standing out prominently. Whorls 6, 

 flat below the suture, angulated at the first spiral, below which the 

 profile line is flatly conical ; it is angulated at the second spiral, 

 and then contracts into the suture below. Suture acutely angulately 

 impressed. Mouth round, angulated at the front of the pillar. 

 Pillar-lip slowly and slightly bent over the umbilicus. Umbilicus 

 open, funnel-shaped, internally scored with minute longitudinal ribs. 

 Alt. "25, diam. '21, least diam., *18 in. (Watson.') 

 The specimen from which I have described this is in bad condi- 

 tion ; but the species is certainly distinct from any other known 

 to me. ( Watson.) 



OffSetubal, 470 fins. ; Off Sombrero Id., W. I., 450 fms. 



Tr. (Margarita) rJiysn* WATSON, Jour. Linn. Soc. Lond., xiv, p. 

 706 ; Challenger Rep., Gasterop., p. 83, t. 5, f. 4. - 



S. PACHYCHILES Watson. PI. 64, figs. 60, 61. 



Shell small, conical, with the last whorl tumid, especially toward 

 the mouth, which is extremely oblique, and has a thickened lip ; 

 carinate, widely umbilicate. Sculpture: spirals in the center of 

 the body-whorl is a strong carinal thread, which almost runs into the 

 outer lip at its junction with the body, but just lies above it, and so 

 stands out round the base of the whole earlier whorls ; this thread is 

 set with strong, sharp, remote tubercles, which become feebler and 

 more crowded toward the mouth ; half way between the carina and 

 the suture is another thread set with feebler tubercles ; these two 

 threads only appear on the second regular whorl, but on the body- 

 whorl, especially towards the mouth, many others make their appear- 

 ance ; a little below the carina, and issuing from the junction of the 

 outer lip is a feebler tubercled thread, defining the base. On the base 



