carnosuni, flavo-fuscuni, lalcraliler lineolis nlgrls variegaluni, roslro porreclo, acu- 

 to , brevi, niaxillis fulvo-corneis , subsinuose marginatis, subaduncis, cirrbis iiifra 

 mentuni cjuatuor, pone aliis tluobus; collum subclislinclum, breve , nuduni, subtus 

 flavicans. Testa ovato -globosa, supi-a nlgro-fusca, subtus flavicans , antice sub- 

 angustior, obliqua , apice Iruncata, sinuosa , poslice convexa, subacutlor, rotundato- 

 marglnala, versus dorsum medluin obsolctc Irlcarlnata , planiuscula,- scuta dorsi non 

 striata , obsoleta, splnalia obscure sublricarinala , convexo - planluscula, cjuincjue, 

 quoruin prlnium pentagonum , antice alatum, sinuoso -marglnatum , postlce rectan- 

 gulare, suboblIcj[uum, medio obtuse angulatum, secundum et tertium oblonga, oct- 

 angula, planluscula, postlce subtcnula, antlce et postlce angulate emarglnala, medio 

 obtuse canaliculata , quartum subliexagonum , convexum, antice et postice tenuius, 

 antice trisplnosum, qulntuni triangulum, convexum, aplce obluse acutum, subverlicale, 

 medio canaliculatum , lateralla clisci obllc^ua, convexa, quatuor, quoruni antlcuni 

 prinaum triangulum, largum , extus dilatatum , media subreclangula, oblonga, versus 

 dorsum introrsum angulate reflexum , postlcum minus, subpentagonum, pone angu- 

 late subacutum, marglnalia doi'si brevia, subi-ugosa, rotundato-marglnala, vlgiuti 

 qulnqvie, quorum primum impar brevissimum, vix conspicuum, subplanum, secun- 

 duni minus , quadrllaterale, tenue , intus angustius, suboblic|uum , tcrlium et sex- 

 tum subrectangula, oblonga , medla verticalia , rotundato-marginata, catapliracla , 

 subtus flava, posteriora paulo largiora, obllcjua, subquadrala, non excavata, margi- 

 ne rotundo. P ec tus ochraceo-flavicans , varie sinuoso-subsulcatum , oblongum, an- 

 lice et postlce rotundato-marginatum , postlce medlo obtuse emarginatum, lobo an- 

 teriore et posterioi'e membranoso-articulatls ac flexiblllbus; bracteae undeclm , qua- 

 rum antica impar rotunda, larga, antice subtruncata , nigro- exsculpta , secunda ulrin- 

 que rbomboidea, intus subacuta , terlia tiiangula , intus acuminallssima, medlo ni- 

 gro-sulcata, quarta quadi-ala, magna, laevis , quinta trapezoidea , inlus attenuata, 

 iiioro-sulcata, postlca subtrlangula vel trapezoldea, anllce et postice tenuior, postice 

 aplce obtuse emarginata, a testae margine remota ; bi-acteae pectoris medii laterales 

 duae suturls separatae; pedes palmati, supra vlridi-fusci, membranosi, infra flavl- 

 cantes intus transverse blsquamosl; ungues breves, compressi, anteriores falcifor- 

 mes fusci; cauda brevisslma, e testa vix exserta, rugosa, pone anum tenuior, sul- 

 cata, aplce acuta, breviter unguiculata. Longitudo corporis 7' 3", capitls Tp", 

 testae 5'9'S caudae 4", sternl 4'; latltudo testae 2|-', capltis 1'} altitudo teslae 1^'. 



Habitat ad ripam fluminis Solimoens. 



3* 



