358 JOURNAL OF CONCHOLOGY, VOL. I4, NO. 12, OCTOBER, I9I5. 



Group N. 

 71. — S. varius Sowerby. Appendix Cat. Polyn. Shells coll. by Stutch- 

 bury, 1829. Thes. Conch., figs. 21, 22. Conch. Icon., fig. 3. 

 {=delesserti C\\tn\x. lUust. Conchyl., pi. 12). 

 (^=7'aiians Auct.). 

 Hab. : Polynesian Islands (Sowerby). 



No reason was given by Sowerby for changing the name from varius 

 to varians. 



72. — S. gravis Fulton, n.sp. 



Shell oval, of a heavy solid substance ; umbonal area white, the 

 rest of the exterior of a rather light purple-brown colour ; both 

 valves with numerous longitudinal rugose ridges, which are more 

 prominent on the right or lower valve ; there are also numerous 

 fine striae between the ridges, these with the concentric lines of 

 former margins give the shell, especially the less-worn undervalve, 

 a rough wavy appearance : judging by the way in which light 

 shews through the undervalve, it is not absolutely solid, but prob- 

 ably of the same laminar construction as in the so-called water- 

 Spondy/us, S. varius Sowb. Interior margin crenulated and edged 

 with same colour as exterior : ligamental area greatly produced, 

 somewhat twisted, and forming a triangle, the sides of which are 

 about 55 mm. in length. 



Maximum dimensions : Height (umbo of lower valve to ventral 

 margin), 144mm. ; width (anterior to posterior margin), 102 mm.; 

 depth or diameter, 67 mm. 

 Hab. ? 

 73. — 6". rubicundus Reeve. Conch. Icon,, pi. 17, fig. 60. 

 Hab. : Philippine Islands. 



Group O. 



74. — 6". candidus Lamk. Anim. Sans Vert., vi., 1819, p. 188. lUust 

 Conchyl., pi. 12, fig. 4. Thes. Conch., figs. 3-5. Conch. 

 Icon., fig. 22. Conch. Cab. (2nd edit.), pi. 10, fig. 4. 

 Hab. : Australia (Chenu) ; Lord Hood's Island (Cuming). 

 Besides white specimens, there are others varying from rose colour 

 to orange. 



75. — S. iredalei Fulton, n.sp. 



Shell solid, exterior of a coral-red colour, except the earliest 

 portion which is whitish, more so on the under than the upper 

 valve ; there are about nine principal longitudinal ridges on the 



