﻿PLANORBIS.— Plate X. 



Inie fit profundi hifu)ulihiihiir, : spird e.rsertd ; on- 

 fradihus duobus, *■«/,<///;/"/"/->, "Itimn aiifrarf,, 

 magno, ventriooso, .■iiij'i-nir 'mfrnn ipu.' n-rinihifnn 

 carinafo, medio obscnri rnriiintn .• iijipiiirrd friijoin!, 

 fere ad medium iiltimi anfractus depressd, supenii: 

 augulatd, infra angulum productd, infra medinm 

 angwstatd, aeuminatd. 



Newberry's Planoebis. Shell dextral, very high, 

 ventricose, hornv, covered with a ])ale thin epi- 

 dermis, with a deep and wide funnel-sbaped 

 cavit}- below ; spire exserted ; whorls two, rather 

 angular, last whorl large, ventricose, crenulately 

 keeled above and below, obscurely keeled in the 

 middle ; aperture trigonal, depressed almost to 

 the middle of the last whorl, angular above, 

 produced below the angle, narrow and acniiii- 

 nated below the middle. 



Lee. Proc. Acad. Phil. 1854, p. ">1. 



Genus, Ccirinife,r. Binney. 



Hnh. California. 



Species 82. (Mus. Sowerhy.) 

 .sounis OBESUS. Pla. ti'sfd tumid,;, altd, .vZ/^/.s/mZ/, 



cast.n„;..s„hr;r;.i;j. 



cnld, int.jnl.ii;,,, r..,i, 



supi-nir aiiguhtt", ii(_, 



rulari, disco infer. 



;„ii„i, 



nnuustii,. 



■n,:n.ln: ./.rrtuntseJ. 



iipicaUbus obtectis. 

 FAT Planorbis. Shell tumid, high, sinistrd, 

 greenish chestnut, thin, inflated ; spire rather 

 narrow, angularly concave; last whorl lai-ge, 

 angular above, rounded below ; aj)erture semi- 

 circular, lower disc concave in the middle, ajiical 

 whorls hidden. 

 ■KER. Proc. Zool. Soc. 1S48, p. 41. 



ipecies 83. (ilus. Sowerby.) 



Plan'or)!IS lentus. Pla. testa fusco-subviridi, medio 

 inifradnum subeceruled, sinistrali, tumidd, altd; 

 spird depressd ; anfractibus plaiiif'ifrnJii^, impe 

 suturam obscure carinatis, ultimo i-.i/n-. ■»///.■. Jn-nln, 

 tcnuifer spiraJiter striaid ; disco iiifcrin 



ctic apicali obtecto ; apertv 



lagiid, ad an- 



contractd, patdb elevatd ; intiis 

 fi(iitiL<ii-fii<:r,:, iiiiirgine inrrassato, flemioso, albo. 



The slack Planorbis. Shell greenish-brown, bluish 

 in the middle of the whorls, sinistral, tumid, 

 high ; spire depressed ; whorls rather flat, ob- 

 scui-ely keeled near the suture, last concentrically 

 ridged, finely spirally striated, lower disc hollow, 

 apical whorl hidden ; aperture large, contracted 

 at the last whorl, a little raised, smoky-brown 

 within, margin thickened, white. 



Say. Albers, Monograph. Planorbis, PL III. f. 4-t;. 



Eab. S. Carolina. 



More tumid and deep, and less sloped at the top of 

 the whorls than Planm-bis frivolvis. 



Species 84. (Mus. Brit.) 



Pi.ANoKHis peregrinus. Pla. testa s^ibcomp)ressd,de.r- 

 trali,pallidiss!me corned; obliquii striata; spiru 

 aiujustimculo, medio subexcavato ; ultim/} atifractit 

 lain, tiimido, supra mediwni obscurissimh angulato ; 

 (Z/.sco inferiori angulaiim umbilicatv ; apcrturd 

 sxibq xiiilrangulatd. 



The wandering Planorbis. Shell subcompres.sed, 

 dextral, very pale horn, obliquelj' striated; spire 

 rather narrow, slightly excavated in the middle; 

 last whoil broad, tumid, very obscurely angular 

 above the middle, lower disc angularly umliili- 

 cated : aperture slightly quadrangular. 



D'(_)uiii.iNY. Voy. Amer. McM-id. PI, XLIV. f. Ki-lC. 

 I //"?.. Bah in. 



