DA COSTA : ON NEW SPECIES OF DliYM^VS. 305 



Dkym^us Boucakdi, n.sp. PL XXVI, Figs. 5, ba. 



Testa ovato-conica, subperforata, tenuiuscula, nitida, albida, fusco 

 sparsim strigata et maculata, sub lente striis minutis impressis trans- 

 Ytrsim sculpta ; anfractus 6 convexiusciili, ultimus f longitixdinis 

 sequans; columella strietiuscula, valde tortuosa; apertura auriformis, 

 intus alba et strigata; peristoma simplex, margine dextro late expanso, 

 albo, columellari brevissinie reflexo, perforationem fere claudente. 

 Long. 27, diam. 11 mm.; apertura 14mm. longa, 7-5 lata. 



Ilab. — Chiriqui. 



This shell collected by the late Mr. Boucard bears some resemblance 

 to D. casitis from Guatemala, but differs from that species in that its 

 columella is strongly twisted, the outer lip more expanded, and its 

 colour white instead of rose, 



Dkym^us PoNsoNBrr, n.sp, PI, XXVI, Figs. 6, 6a. 



Testa oblongo-turrita, perforata, solidula, rugose striata et subtiliter 

 malleata, sordide roseo- cornea, fascia unica obsoleta alba cincta ; 

 siitura impressa et subcrenata ; spira acuminata ; anfractus 8^ vix 

 convexiusculi, ultimus ^ longitudiuis subsequans ; columella recedens, 

 reriexa ; apertura vix obliqua, intus ochracea, ad basim parum 

 attcnuata; peristoma simplex, acutum. Long. 33, diam. 12 mm,; 

 apertura 13"5mm. longa, 5'5 lata. 



JIab. — Surco, Peru, at an elevation of 2,050 metres. 



A shell that somewhat resembles D. cylindricus, Da Costa,' but 

 differs in having a more tapering form with an extra whorl, and in 

 being malleated throughout. 



Dktm^us conicus, n.sp. PL XXVI, Figs. 7, la. 



Testa pyramidali-conica, minute umbilicata, tenuis, nitida, laevigata, 

 alba, strigis pellucido-comeis, opacis obliquis subdistantibus ornata ; 

 anfractus 7 parum convexi, ultimus \ longitudinis sequans ; spira 

 turrita ; apex acutus, rufescens ; columella recedens, subrecta, breviter 

 reflexa, appressa; apertura oblongo-ovata; peristoma simplex, acutum, 

 hand expansum. Long. 17*5, diam. 7 mm.; apertura 7 mm. longa, 

 4 lata. 



Hah. — Oaxarca, Mexico. 



A shell of simple form unlike any other from the same region. It 

 was discovered by the late Mr. Boucard during his travels in Mexico. 



EXPLANATION OF PLATE XXVI. 



Figs. 1,1a, Drymceus punctatics, n.^^. 



,, 2, 2a. ,, ,, var. albida. 



,, 3, 3a. ,, ,, var. ventricosa. 



,, 4, 4a. ,, incognita, n.sp. 



,, 5, 5a, ,, Boucardi, ii,sp. 



,, 6, 6a. ,, Ponsonbyi, n.sp. 



,, 7, 7a. ,, conicus, n.sp. 



Proc. Make, Soc, vol iv, p. 233, pi. xxiv, fig. 3. 



VOL. VII. — JUNE, 1907. 



