118 CBUCIBULUM. 



Yar. QUIRIQUINA, Lesson. PL 32, figs. 30, 31. 



Finely radiately costulate, or smooth. Mutations of this 

 form have been called G. trigonale, Ads. and Reeve (fig. 25), G. 

 ferrugineum, Reeve (fig. 26), C. lignaria, Brod. (figs. 27, 28), 

 G. tenue, Brod. (fig. 29) and G. spectrum, Reeve (figs. 30, 31). 



Var. AURICULATUM (Chemn.), Auct. PI. 32, figs. 34, 35. 



Whitish or light brown, brown-speckled or unicolored, de- 



pressed, rugosely irregularly radiately ribbed. 



West Indies. 



It can scarcely, except by locality, be distinguished from flat 

 specimens from the West Coast, yet the flatter rude form is 

 predominant in the West Indies, whilst in the former localities 

 it is exceptional. The synonymy includes C. Cuvieri, Desh., 

 C. planatum, Schumn., G. Caribbeense, Carp. 



Yar. VIOLACEUM, Carpenter. PL 32, figs. 36, 3t. 



Ribbed and colored like the preceding species, interior light 

 violaceous or violaceous brown. 



Yar. TUBIFERUM, Lesson. PL 32, figs. 32, 33, 38 ; PL 33, figs. 

 39-43. 



Closely radiately striated, distantly radiately costulate, the 

 riblets prickly with short or long tubular hollow processes. 



West Coast of America, Chili to California. 



Typical specimens of this form might readily be distinguished 

 as a species, but the intermediates connect it with var. quiriqui- 

 num. It is better known under the later name of C. spinosum, 

 Sowb. (fig. 38). Other sjmonyms are C. cinereum, Reeve (fig. 

 39), C. hispida, Brod. (fig. 42), C. Peziza, Gray, var. compresso- 

 conicum, Carp., C. maculatum, Brod. (fig. 43), and C. striatum, 

 Brod., not Say (= G. auritum. Reeve, figs. 32, 33), the last two 

 variations connecting with the smooth or finely striate variety. 



C. STRIATUM, Say. PL 33, figs. 44, 45. 



Aperture orbicular, apex usually rather high, beaked, 

 surface radiately striate, cup broadly open, attached fully one- 

 third of its circumference ; brownish white, brownish within. 



New England to New Jersey. 



The type of the section Dispoteea, Say, which has no claim to 

 be separated from the main group. 



