56 THE NAUTILUS. 



have 9-10 whorls ; if the shell is entire (rare) there are 22-24 

 whorls, the two embryonic ones being smooth, corneous and some- 

 what bulbous. The radula formula is 7.2.1.2.7, there being 19 teeth 

 in each transverse row ; the inner two laterals on each side are much 

 larger than the others, the third tooth becoming abruptly smaller 

 than the second ; the outer laterals are capped with a low ledge in 

 place of cusps. The internal axis of the shell is encircled by a low 

 thread below, which in the upper whorls is lamelliform and bears 

 very delicate filament-like spines. This last character determines 

 the position of this species in a group along with U. wrighti, 

 baculum etc., although the radula frequently indicates the Section 

 Teterentodon. 



Central Cuba on walls and stones at Cerro de Guajabana near 

 Caibarien, Santa Clara Province. 



Urocoptis (Gongylostoma) livida, n. sp. Plate vi, figs. 21, 22. 



Shell slenderly fusiform, somewhat swollen in the middle third, 

 tapering to a narrow truncation above ; livid-colored, fleshy above 

 and bluish or purplish below. Surface, glossy, sculptured with obli- 

 quely subarcuate riblets not flattened on the lower whorls. Remain- 

 ing whorls 10-12, somewhat convex, the last free in a descending 

 curved neck scarcely carinated. Aperture as in U. cinerea but paler 

 within. The spiral thread of the axis is stronger and perceptibly 

 spinose in the middle and upper whorls. 



Longitude 16, diameter 2.7, aperture diameter 2.1, whorls 11^. 



Longitude 17, diameter 2.9, aperture diameter 2.3, whorls 12. 



Longitude 12.5, diameter 2.2, aperture diameter 2, whorls 11. 



Central Cuba : On walls and large stones at El Palenque de 

 Taguayabon and La Puntilla, near Remedies in the Province of 

 Santa Clara. 



This species differs from U. cinerea Pfr. by its more fusiform 

 shell, livid color, glossy surface and by its regular sculpture ; also by 

 its stronger internal axis. 



Urocoptis livida occulta n. subsp. Plate vi, fig. 23. 



Differs from the type in sculpture and color ; the surface is glossy 

 and nearly smooth, the riblets being obsolete in the middle whorls 

 but well raised on the free curved neck ; the color is livid pinkish 

 above and violet below with scattered corneous streaks, peristome 

 white. 



