48 HELIX JEANNERETIA. 



f 



Navassa is a guano island. The species does not seem to belong 

 to Coryda, but without seeing a specimen I cannot guess at its affin- 

 ities. 



H. STENOSTOMA Pfeiffer. PI. 14, fig. 84. 



Imperforate, globulose-depressed, solid, nearly smooth, shining, 

 white, ornamented with a single brown peripheral fascia and two 

 series of orange maculations, obsoletely punctate with grayish ; 

 whorls 4J, scarcely convex, the last ventricose, abruptly deflexed 

 anteriorly ; aperture sub-horizontal, elliptical ; peristome la*biate, 

 white, margins approximating, the upper narrowly expanded, basal 

 arcuate, reflexo-appressed. 



Alt. 9, diam. maj. 15s; min. 13 mill. ( Pfr.) 



Martinique, 



H. stenostoma PFR. P. Z. S. 1846, p. 28; Monogr. i. p. 280. v, p. 

 304. 



Known to me only by Pfeiffer's diagnosis and Reeve's figure. 



Section VII. JEANNERETIA PfeifFer, 1877. 



Jeanneretia PFR. Malak. Blat, xxiv, p. 7. PFEIFFER-LESSIN, 

 Nomenclator Hel. Viv. p. 116. 1881. (formerly included in Frutici- 

 cola and Hygromia.} 



This is a distinct, well-marked section. It seems to me to be allied 

 to Eurycampta Albers, not to Fruticicola etc., where it is grouped by 

 Pfeiffer. Being imperfectly acquainted with the anatomy I am 

 unable to decide whether these two sections (Jeanneretia and Eury- 

 campta) should be grouped with Lysinoe and allied forms inhabit- 

 ing the mainland of the Americas, or with the present group. 



The radtiloj and jaws are unknown. I expect to find that the 

 central and lateral teeth have long basal-plates, bearing central 

 cusps but not side cusps. 



The genitalia (imperfectly known by Poey's incomplete figures, 

 Memorias. ii, pi. 5, 6, 7,) are similar in Jeanneretia and Eurycampta ; 

 being characterized by the very slender penis, with the vas deferens 

 inserted in its apex, and provided with an extremely long flagellum, 

 and by the extremely long, slender duct to the sperm atheca. All of 

 these points agree pretty closely with Lysinoe and Odontura and 

 also with Coryda, the only section of the Group Hemitrochus (in the 

 wide sense) in which the genitalia are known, There is but little 



