> 
eee N Berivus: 
Vor. XII. JULY, 1898. No. 3. 
A NEW JAMAICAN LAND SHELL. 
BY J. B. HENDERSON, JR. 
Ravenia Hollandi n. s. 
Imperforate, rather thin, subtranslucent, pale horn color. Whorls 
10, well-rounded, sutures impressed ; from 30 to 35 somewhat strongly 
developed longitudinal waving ribs upon each whorl, 
except upon the two apical which are perfectly 
smooth. Apex obtuse. Aperture ear shaped, much 
narrowed in the middle, suggestive of the figure 8. 
Columella strongly twisted like the letter “S,” and 
thickened. Outer lip slightly pinched in the middle 
where it is armed with a prominent tooth. Alt. 9 mm. 
“ Jamaica,” Dr. W. J. Holland. 
\ The genus Ravenia was created in 1873 by Crosse 
AAA (Journal de Conch., Vol. 21, p. 69) to include a 
— Se 
— % 
= = 
single species from Curacoa, R. blandi (do. Vol. 22, 
pl. 2, fig. 4). The author remarks that the form 
is an eccentric one “between Spirazis and Pupa.” 
Tryon, in St. and Syst. Conch. (Pt. 3, p. 18), in- 
cludes the genus within the Streptazide. The exact 
position of this curious genus is doubtful, and, 
without a knowledge of the anatomy, cannot definitely be placed. 
It is not unlikely, however, that it will fall within the Stenogyride, 
probably next to Spiraxis. The character of the constriction in the 
centre of the outer lip is common to Spiravis, and is sometimes to be 
observed in Varicella, the Jamaican section of Glandina. There 
