THE NAUTILUS. 



51 



of the spire. The surface is lusterless, with sculpture of strongly 

 raised, rough spiral ridges parted by much wider concave intervals. 

 On the last whorl there are 18 such ridges, stronger and more 

 widely separated in the peripheral region. The intervals are 

 obliquely roughly striate, and the wider ones above the periphery 

 have also a few spiral threads. Six spiral ridges show on the pen- 

 ultimate whorl. They gradually become weaker on the spire. The 

 embryonic whorl is rather large (2 mm. diam ), and smooth except 

 for faint radial stria?. Whorls 4, rapidly widening, almost flat, the 

 last whorl descends shortly to tlie aperture, and is convex beneath. 

 Aperture large, flaring, strongly oblique, white with a trace of yel- 

 low within. The peristome is well expanded, thickened within 

 some distance from the edge. There is a transverse tubercle at the 

 junction of columella and basal lip. The axial callus is pure white, 

 not very thick, spreading within nearly to the outer termination of 

 the lip. Edge of parietal callus is very thin. 



Alt. 15.5, diam. 26.5 mm. 



Operculum calcareous, shining, bluish-white with iridescent 

 lights, reddish on margins and densely covered with minute granules 

 separated by species of about equal width. 



Collected by T. Wayland Vaughan at Los Negros, 25 miles 

 southeast of Bayamo in the province of Oriente, Cuba, in woods on 

 low limestone hills. 



This superb species I take pleasure in naming after Dr. Carlos 

 de la Torre of Havana. 



Cepolis alauda cymatia n. subsp. PI. 4, fig. 4. 



The shell closely resembles C. alauda avellanea (F^r.) in texture 

 and coloration, but differs by its more elevated, more conic spire, 

 and by having a strong oblique crest behind the lip. Alt. 24, diam. 

 28 mm.; whorls 5^. 



Cuba ; exact locality of the type unknown. 



This well-marked variety, not uncommon in collections, appears 

 hitherto to have escaped observation. I have no doubt that in a 

 critical revision ot the Coryda group this form will be given spe- 

 cific rank. 



