M Y C E T P U S 



(Fig. a, Mi/ietopn-f silhjii 



I'latr I.) 



Species S. (Mus. 



copied.) 



bpe 



7. (Mus. Brit.) 



Mycetopus rugatus. Mi/c. Icila ciiiicifonui, elovr/atd, 

 ■lo/idiunciilti, irregalariter coiicentrice. rtigaM, epider- 

 mide olivaceo-fMcd ; latere antico prodiiclo, anyuato, 

 n/i/ifju'e snbiiiflato, termino roluiulalim acumiiialo, 

 iiirdio coiiipremo ; latere pvstico latiore, angulato, 

 iiiargine termiiiali tnmcato ; umboniljus promineiitiljus. 



The wrinkled Mycetopus. Shell cuneiform, elon- 

 gated, rather solid, irregularly concentrically ridged, 

 epidermis olive-brown; anterior side produced, nar- 

 row, obliquely somewhat inflated, end roundly acu- 

 minated, middle compressed; posterior side wider, 

 angular, terniiual margin truncated ; urahoes promi- 



species verv 

 er characters 



Iiowever. cuncate, ; 



Mycetopus ventricosus. Mi/c. testa rhowboided, temti, 

 oUvaceo-faacd, epidermide striata ; latere antico bre- 

 viiisculo, Inflato, supra cuneato, versus marghiem ten- 

 tralem oblii/iio, medio depresao, margine veiitrati vix 

 co/icavo ; latere postico obtuse biangidato, inter angidos 

 rotnndatim inflato, supra depresso, margine terminali 

 oljliquo ; Uinbonibus prominentiljus, margine dorsnli 

 recto. 



The ventricose Mycetopus. Shell rhomboidal, thin, 

 olive-brown, epidermis striated; anterior side rather 

 short, inflated, cuneate above, oblique towards the 

 ventral margin, middle depressed, ventral margin 

 very slightly concave ; posterior side obtusely bian- 

 gular, roundly inflated between the angles, depressed 

 above, terminal margin oblique; uudioes prominent, 

 dorsal margin straight. 



D'Okbigny, Voy. Ainer. Merid. pi. 72. f. 2, 3. 



Ilab. Chiquitos, Bolivia. 



Shorter and more rhomboidal than any other species, 

 excepting M. WeddeVii. 



.Mare!,, 1SG8. 



