THE NAUTILUS. 



RARY 



VOL. XII. 



JULY, 1898. 



No. 3. 



A NEW JAMAICAN LAND SHELL. 



BY J. B. HENDERSON, JR. 



Eavenia Holland! n. s. 



I ni perforate, 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 Eavenia was created in 1873 by Crosse 

 (Journal de Conch., Vol. 21, p. 69) to include a 

 single species from Curacoa, jR. blandi (do. Vol. 22, 

 pi. 2, fig. 4). The author remarks that the form 

 is an eccentric one "between Spimxis and Pupa." 

 Tryou, in St. and Syst. Conch. (Pt. 3, p. 18), in- 

 cludes the genus within the Streptaxidce. 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 Stenogyridce, 

 probably next to Spit-axis. The character of the constriction in the 

 centre of the outer lip is common to Spiraxis, and is sometimes to be 

 observed in Varicella, the Jamaican section of Glandina. There 



