1878.] LAND-SHELLS FROM COSTA RICA. 73 



Hab. Buena Vista, Costa Rica, at an altitude of 3000 feet. 



(Mus. Boucard.) 



Ihis shell belongs to a group of Helices remarkable for their 

 curiously toothed apertures, having as its nearest allies H. quadri- 

 dentata, Brod., and //. auriculina, Petit. 



Cyclotus boucardi, n. s. (Plate V. figs. 3, 4.) 

 Shell widely and perspectively umbilicated, globosely turbinate, 

 white, with a broad olive-chestnut band above and a narrower one 

 just below the periphery, very finely longitudinally striated and 

 crossed with rows of rugged irregular undulating oblique malleated 

 ridges; whorls 6, convex, rapidly increasing, the last large and 

 rounded ; aperture nearly circular, white within ; peritreme simple, 

 scarcely thickened, with a semilunar notch at the junction of the body- 

 whorl. 



Diam. maj. 16 lines, min. 13, alt. 12. 

 Hab. San Carlos, Costa Rica. 



A fine species with an excavated notch where the peritreme touches 

 the body- whorl, as in Cyclotus mexicanus, Menke, from Vera Cruz. 



{Mus. Boucard.) 

 Bulimus josephus, n. s. (Plate V. figs. 13, 14.) 

 Shell perforate, elongately ovate, moderately solid, very finely 

 obliquely striated, whitish, ornamented with somewhat distant irre- 

 gular slightly undulating narrow olive-brown stripes, which become 

 obsolete near the umbilical region ; spire elevately conical ; sutures 

 impressed ; apex brownish yellow ; whorls 6|, flatly convex ; aper- 

 ture ovate ; somewhat effuse below ; outer lip expanded and flattened ; 

 columella triangular and flattened inwards, ending in a blunt rounded 

 callus internally. 



Diam. 7 lines, alt. 16. 



Hab. San Jose', Costa Rica, on the trunks of acacia trees. 



(Mus. Boucard.) 

 Bulimus irazuensis, n. s. (Plate V. figs. 17-20.) 

 Shell somewhat elongately ovate, rimate, moderately thin, longi- 

 tudinally irregularly striated, shining, more or less longitudinally 

 striped or freckled with black, and ornamented with numerous small 

 white spots ; whorls 6, rather convex ; spire a little shorter than the 

 aperture ; aperture oblong-ovate ; lip thin, simple, tinged inside with 

 rose-colour. 



Diam. 6 lines, alt. 12. 



Hab. Volcano of Irazu, Costa Rica, on low aromatic bushes on 

 the eastern slope of the volcano. 



A variety of this pretty species occurs in which the prevailing 

 colour is light brown, profusely sprinkled with little white spots. 



(Mus. Boucard.) 



Bulimus navarrensis, n. s. (Plate V. figs. 15, 16.) 



Shell narrowly rimate, more or less elongately ovate, thin, irre- 



