132 CAPULUS. 



A species having a wide distribution in warm seas. It is 

 ? G. militarise Wood, C. incurvus, Gmel., G. liberatus, Pease 

 (fig. 76). 



C. BADIUS, Danker. PI. 39, figs. 17, 78. 



Laterally compressed, obsoletely radiately costulate, orange- 

 brown. Length, 15- mill. 



Japan. 

 Has somewhat the aspect of a Hipponyx. 



C. SAGITTIFER, Gould. PL 39, figs. 79, 80. 



Smooth, thin, translucent white, with minute arrowhead- 

 shaped markings of more opaque white, arranged in quincunx 

 order. Diam. 6 mill. 



Hob. unknown. 

 C. VIOLACEUS, Angas. PI. 39, fig. 81. 



Laterally compressed, radiately striated, apex free, inclined 

 to the right ; internally with a very narrow rib, rounded at the 

 edge, situated in the cavity of the shell and extending on either 

 side nearly to the interior of the aperture ; interior violaceous. 



Length, 16 mill. 



Port Jackson, Australia. 



Described from a single specimen. 



Section CAPULACM^EA, M. Sars. 



C. RADTATUS, Sars. PI. 40, figs. 84-87. 



Thin, transparent, radiately. striate or smooth except growth- 

 lines, whitish or yellowish, faintly strigate with darker color, 

 under a thin yellowish epidermis, base rounded, apex small, 

 inclined. Length, 22 mill. 



Circumboreal : Sea of Ochotsk, Alaska, Davids Strait, 



Norway, Spitzbergen, Japan. 



The synonymns are Pilidium commodum, Midd. (figs. 86, 87), 

 Piliscus probus, Loven, Capulus dilatatus (figs. 84, 85), and 

 C. depressuSj A. Adams. 



ALLERYA KREBSIT, Morch, and PROPILIDIUM TENUE, Jeffreys, 

 both referred to this group, are members of the family 

 SIPHON ARIIDJS. 



