GUILDFORDIA. 399 



Australian in their geographical range, a few, however, 

 also occurring in New Zealand. 



Species of Stella. 



armata, Phil. nobilis, Gray. 



asperata, Lain. laciniata, Gould. 



asteriscus, Reeve. papillata, Pot. and Mich. 



auripigmentum, Jonas. rotularis, Lam. 



bicrenata, Goidd. Spengleriana, Chem. 



columellaris, Phil. stellaris, Gmel. 



confragosa, Goidd. stellata, Chem. 



Cubana, Phil. tuberosa, Phil. 



Genus GUlLFORDIA, Gray. 



Operculum flat, with a very slight ridge near the arched, 

 or outer margin. 



Shell trochiform, depressed; whorls with an iridescent, 

 golden nacre, and with transverse rows of granules, the 

 last whorl angulated, the periphery surrounded by long, 

 tubular, radiating spines ; aperture trapeziform ; inner lip 

 sharp, incurved ; outer lip thin, irregular ; axis impressed, 

 not perforate, umbilical region surrounded by a smooth, 

 elevated callus. 



Si/n. Astralium, Phil., not Link. 



Ex. G. triumphans, Pliilippi, pi. 44, fig. 5. Oper- 

 culum, G. triumphans, fig. 5, a, 5, b. 



The shell in this genus has the same texture and 

 golden nacreous appearance that are to be found in 

 some of the species of Ziziphinus. The animal has 

 not been observed, and the only species at present 

 known is a beautiful shell from the shores of Japan. 



