420 Ehrenberg: Verbreitung und Einßufs 



167 P. Amphigomphus, testula major oblonga, a dorso lateribus rectis, api- 

 cibus argute cuneatis subacutis. Icon! Navic. Amphigompho affinis. 



1G8 P. amplüoxys, testula anguste linear! -lanceolata, utrinque acuta pinnu- 

 lis rectis. 



169 P. Amphiprora, testula major, a dorso anguste lanceolata apicibus late 



obtusis, habitu Amphiprorae navic, sed aperturis apicis marginalibus. 



170 P. Apis, testula a dorsa oblonga, media in partes duas fere semiorbicu- 



lares constricta, apicibus obtusis, pinnulis asperis. Icon ! 



171 P borealis, testula parva linearis, apicibus rotundatis non constrictis, pin- 



nulis validioribus. Habitus Fr agilariae pinnatae. Iconl 



172 P chilensis, testula major oblonga lateribus rectis apicibus late rotun- 



datis non constrictis, pinnulis validioribus in j^- lineae 11-12. Iconl 

 P. viridi affinis. 



173 P? Conops, testula a dorso oblonga, media in partes duas cordatas con- 



stricta, apicibus apiculatis, acutis, pinnulis subtilissimis. Iconl 



174 P cosiata, testula magna brevis crassa, ovato-oblonga, apicibus late ro- 



tundatis, pinnulis magnis extus elatis costata, in -^ lineae 6. P Da- 

 ctylo affinis. 



175 P Cyprinus, testula a dorso lanceolato-oblonga apicibus late rotundatis, 



umbilico oblongo. Iconl Fragmentum. 



176 P. Daclylus, testulae longata bacillaris, lateribus a dorso rectis, levissima 



curvatura in apices late rotundatos parumper angustiores abeuntibus, 

 pinnulis in quavis centes. parte lineae 14. Iconl 



177 P dccurrcns, testula angusta lanceolato-elongata, a dorso media late tu- 



midula, apicibus sensim parumper attenuatis late rotundatis. Iconl 

 P. gibbae affinis. 



178 P diomphala, testula a dorso late lanceolata brevis, apicibus constrictis 



truncato obtusis, umbilico medio transverso linea longit. in duas par- 

 tes diviso. Iconl 



179 P. disphcnia, testula a dorso lineari-elongata, latior, lateribus rectis, api- 



cibus argutius cuneatis acutis, pinnulis in margine tantum subtilissimis 

 ■visis. Iconl P. Amphigompho affinis. 



180 P. Entomon, testula major elongata, a dorso media constricta, partibus 



duabus oblongis versus apices cuneatis, subacutis. Iconl 



181 P. Esox, testula magna elongata, a dorso anguste lanceolata lateribus le- 



