142 CERITHIUM. 



. MACROSTOMA, Hinds. PI. 26, figs. 13-15, 10. 



Pale fulvous, or whitish, thin, spirally striated, longitudinally 

 ribbed, spire whorls more or less angulated in the middle, ribs less 

 distinct on the body whorl , outer lip thickened. Length, 12 mill. 



Borneo. 



I unite with this species C. costatum, A. Ad. (fig. 13) == C. costi- 

 ferum, A. Ad. == C. rigens, Bayle, C. pupatforme, A. Ad. (fig. 15), 

 which, according to the form of the aperture, and sharp lip is not 

 adult, and C. pygmcea, H. Ad. (fig, 10), the latter a more highly 

 colored specimen. 

 C. BRAZIERI, Tryon. PI. 26, fig. 16. 



Subcylindrical, fragile, white, whorls angulated and tuberculated 

 on the middle, finely spirally striate, longitudinally faintly costate, 

 aperture prolonged below into a straight, sharp canal. 



Length, 1 in. 



Australia. 



An aberrant form, almost deserving to be made the type of a new 

 group. The extreme fragility and form of the mouth indicate 

 juvenility. Mr. Brazier sent us several specimens, which all exhibit 

 the above characters. 



C. GRACILE, H. Adams (unfigured). Eastern *SVv/.. 



Mr. Adams says that this species was subsequently described by 

 Mr. Sowerby under the name of C. coarctata; I have not found this 

 latter description. 



Section LIOCERITHIUM, Tryon, 1887. 

 . INCISUM, Sowb. PI. 27, fig. 22. 



Shell with spiral incised grooves, whitish or grey, marbled with 

 chocolate, sometimes articulated at the suture, interior white, 

 grooved with chestnut. Length, 1 in. 



L. California; Guaymas, Mex. 



The localities Australia and Philippines, of the monographers, are 

 incorrect. 

 C. CURTUM, Sowb.. PL 27, fig. 23. 



Shell similarly sculptured and colored as the preceding, but 

 .shorter and stouter. Length, 18 mill. 



Cerros Is., L. California. 



This may be a variety of the preceding species, but I have not 

 seen intermediates. Bayle has changed the name to C. Euros, on 

 account of C. curtum, H. C. Lea, 



