KULTON : THE RECENT SPECIES OF SPONDYLUS. 359 



upper valve, bearing short stunted spines, between these ridges 

 are seven to ten finer ridges having somewhat the appearance of 

 granose striae, but seen under the lens to consist of minute and 

 more or less fluted spines or costae; ligamental area produced, 

 leaving the umbones about 13 mm. apart; margin of interior 

 narrowly bordered with orange-red. 



Maximum dimensions : Height, 66 mm. ; width, 47 mm. ; dia- 

 meter or depth, 35 mm. 

 Hab. : Kermadec Islands (T. Iredale). 



Besides the type, which is in good condition, Mr. Iredale collected 

 a number of odd valves (more or less worn) the largest of which 

 measures 68 x 64 mm. ; he also obtained a young and perfect example 

 which has some longer spines; probably older specimens living under 

 more favourable conditions than the type would have comparatively 

 longer spines. Although the specimens vary in form, they are all 

 constant in colour, and in possessing the characteristic sculpture. 



Named in honour of Mr. T. Iredale, to whom we are indebted for 

 many valuable papers on the mollusca. 



76. — S excaviitus Chenu. Illust. Conchyl., p. 5, pi. 19, fig. 2. 

 Hab. : Cape de Verde Islands. 



77. — S. occidens Sowerby. Joutn. of Mai. ^ 1903, vol. 10, p. 77, figd. 

 Hab, : Philippines. 



78. — S. flabellum Reeve. Conch. Icon., pi. 6, fig. 21 ; and pi. 13, 

 fig. 2 IB. 

 Hab. ? 



79. — ^S". pacificus Reeve. Conch. Icon., pi. i, fig. i. Conch. Cab. 

 (2nd edit.), pi. 10, fig. 5. 

 Hab. : Lord Hood's Island, Pacific (Cuming). 



80. — S. anacanthus Mawe. Linn. Syst. Conch., 1823, pi. 2, fig. 3. 

 Conch. Cab., vol. xi., pi. 203, figs. 1989, 1990. Thes. 

 Conch., figs. 39, 40. Conch. Icon., fig. 2. 



{r=nudus Reeve. Conch. System., 1841). 

 Hab, : West Indies (Chenu); Mauritius and Philippines (Cuming); 

 Japan (Dunker). 



8t. — S. obliqinis Chenu. Illust. Conchyl., p. 7, pi. 24, fig. 5. 



Hab.? 



Sowerby, in the Thes. Conch., i., p. 426, suggests that this may be 

 a young varius Sow. (=varians Auct.), but I fail to see any likeness 

 to the young of that species. 



