ROSTELLARIA. 129 



sulcate near the suture ; lip five- or six-dentate ; orange-brown, 

 obscurely livid-banded near the suture. Length, 6'25 inches. 



Philippines. 

 Two specimens known. 



Subgenus RIMELLA, Agassiz, 1840. 



R. CANCELLATA, Lam. PI. 10, figs. 18, 20. 



Whorls cancellated, occasionally varicose, posterior canal pro- 

 duced upon the spire, which it ascends in a curved line, interior 

 of outer lip dentate; pale yellowish brown, 'indistinctly banded 

 with pale chestnut. Length, 1-1-25 inches. 



Philippines. 

 R. CRISPATA, Sowb. PI. 10, fig. 19. 



Shell cancellated by rather sharp narrow ribs, and revolving 

 riblets, occasionally varicose ; posterior canal short, curved 

 strongly to the right ; yellowish white, pale chestnut-banded. 



Length, 1 inch. 



Philippines, China. 



Distinguished from R. cancellata by its more ventricose form, 

 and short posterior canal. 



R. SPECIOSA, H. and A. Adams. 



Shell reticulated, more lanceolate than . cancellata, not 

 ending anteriorly in a recurved beak, with the varix of the outer 

 lip plain externally, and with the posterior canal of the aperture 

 faintly developed and only extending as far as the penultimate 

 whorl. Length, 1 inch. 



Hob. unknown. 



An unfigured species. Is it R. crispata ? 



R. TYLERI, H. and A. Adams. 



Cancellated, posterior canal extending to the third whorl and 

 curved, outer lip corrugately plicate within, with an anterior, 

 conspicuous, sharp tooth ; yellowish with four chestnut bands. 



Length, 21 mill. 



China Sea. 



Unfigured. 



