ADDITIONS AND CORRECTIONS. 471 



Trochidce of undetermined systematic position. 



Margarita cumingii A. Adams. Shell elevated-conical, cinereus, 

 painted with brown undulating lines, broadly umbilicated ; whorls 

 ornamented with transverse riblets, the last with 3 median lirse, 

 longitudinally elevated striate ; umbilicus large, encircled by a crenu- 

 lated ciugulus, within elegantly decussated by radiating and transverse 

 lines. (P. Z. S. 1851, p. 19L) 



Philippines. 



Margarita variabilis A. Adams. Shell orbiculate-conic, sub- 

 depressed, broadly umbilicated, pallid, painted with brown and gray, 

 varied with white ; whorls rounded, transversely deeply sulcate ; 

 umbilicus perspective, margin crenulated ; base nearly plane ; labial 

 margin subcrenulated. (P. Z. S. 1851^ p. 191.) 



Habitat unknown. 



Margarita balteata A. Adams. Shell orbiculate-conic, scarcely 

 umbilicate, grayish, tessellated with brown ; whorls gibbous, deeply 

 sulcated transversely ; last whorl subangular ; base rather flattened, 

 concentrically sulcate ; columella curved, scarcely truncate. 



(P. Z. S. 1851, p. 191.) 



Habitat unknown. 



Margarita tessellata A. Adams. Shell depressed-conical, 

 broadly umbilicated, smooth, cinereus, regularly tessellated with 

 gray ; whorls rather flattened, the last subangular ; base convex ; 

 umbilicus white inside ; aperture rotund, iridescent with green 

 inside. (P. Z. S. 1851, p. 191.) 



Margarita dilecta A. Adams. Shell orbiculate-conic, broadly 

 umbilicate, shining, Avhitish, radiately painted with rufous flames ; 

 whorls convex, ornamented with elevated acute cinguli, crenulated 

 above, the interstices closely longitudinally striate; base convex, 

 whitish, nearly smooth, radiately striate; umbilicus perspective, 

 margin crenulated. (P. Z. S. 1854, p. 40.) 



Straits of Magellan {Cuming). 



Margarita aspecta A. Adams. Shell turbinate-conic, broadly 

 umbilicate, grayish, gold-shining, maculated with brown ; whorls 

 rounded, excavated at the sutures, ornamented with elevated crenu- 

 lated subdistant cinguli, the interstices longitudinally striate ; base 

 convex, concentrically cingulate ; umbilicus large, open, bounded by 



