DA COSTA : sooxn axp ckxtkat, AMERICAN laxh shells. ;' 



Drym^us angustus, n.sp. PL I, Figs. 7, 8. 



Testa elongato-oblonga, perforata, tenuiuscula, Isevis, nitida, albida ; 

 strigis caerulescenti-fuscis, angustis, longitudiualiter undulatis, ornata, 

 macularum seriebus duabus cincta; anfractus 6^, convexiusculi, 

 ultimus spira paulo brevior ; sutura marginata ; apertura oblonga, 

 basi eifusa, iutus purpurea ; columella subplicata, oblique recedens ; 

 peristoma simplex, late expansum, marginibus callo tenui purpureo 

 junctis. Long. 31-5, diam. 10; apertura 14 longa, 6*5 lata. 



Hab. — Bogota. 



The nearest ally of this form is D. fusoides, Orb., a much thinner 

 and broader shell. This unique specimen is not in very fresh 

 condition, the marking being somewhat indistinct. It is incorrect 

 to state that I), fusoides is peculiar to Bolivia, the writer having 

 specimens from both Ecuador and Colombia. 



Drym^us Pkestoni, n.sp. PI. I, Figs. 9, 10. 



Testa elongate -ovata, perforata, tenuiuscula, nitida, albida, strigis 

 nigro-castaneis longitudiualiter picta, anfractus 6|-, convexiusculi, 

 irregulariter striati, ultimus * testae aequans ; sutura marginata ; 

 apertura ovalis, peristoma crassiusculum, vix expansiusciilum, roseum ; 

 columella breviter dilatata, rosea. Long. 21, diam. 10 mm.; apertura 

 10 longa, 6 lata. 



Var. CANCELLATA. Fig. 10. 



Testa similis, sed brevior, zonis tribus cinctus. 



Mab. — Chiriqui, Panama. 



This species bears a strong resemblance to D. iraziiensis, Angas, and 

 is represented by several examples hitherto unnamed in the British 

 Museum. I have much pleasure in naming this pretty shell after my 

 friend Mr. H. B. Preston. 



Amphicyclotus Chanchapoyasensis, n.sp. PI. I, Figs. 11-13. 



Testa ampliter umbilicata, orbiculari-depressa, epidermide decidua 

 ustulato-castanea induta ; spira conico-depressa ; anfractus 4^, undique 

 spiraliter lirati, ultimus lineis incrementi fortiter striatus, ad peri- 

 plieriam saturate fusco fasciatus ; apertura circularis; peristoma 

 simplex; operculum corneum, arctispirale. Diam. maj. 27, min. 

 21 mm. ; alt. 17 mm. 



Hai. — Chanchapoyas, Peru. 



This species somewhat resembles A. Guayaquilensis, Sow., from 

 Ecuador, in its spiral sculpture; it is, however, a larger shell. 

 Among several specimens received one example shows a variation 

 in respect of altitude, being much more depressed, all the other 

 features being the same as the type. This would appear to be the 

 only species of the genus hitherto discovered in Peru. 



Neocyclotus depressus, n.sp. PI. I, Figs. 14-16. 



Testa aperte umbilicata, plane depressa, subdiscoidea, fulvescenti- 

 olivacea, supra peripheriam pallida, ad peripheriam linea fusca cincta ; 



