﻿P T E R P D A. 



Plate VI. 



Spcc-lfs :!'.!. (Mils. S.iwcrl.v.) | Species -ii. (Mus. Brit.) 



Sl'lUlAWS AUSTRALIS. Sju\ l,'.<l,! I'lixifann i , hiinliiiii, j (Athiiita.) 



lvvi<jnl,i ; spin! .h, hi mnir.:. ,nijni,-l ih„s ./iihu.-^, j ATLANTA INh'l.ATA. .\t!. trsh! „ll„i, „a„i;}unlr,l. f,-,;' 



nnimni.il.l pm,/,,,-!,! ; l.,hr<> wr.lin sl.nciln. ; nnihiln-ahi, ,•.,•/ /is siihoin'nain: „perl,mls„J,h;,,oi,,!. 



Tiu: AusiKAi.iAN SriKi.MJs. Shell fusiiorm, hyaline. ; lahn, in pn„-r.-<^„ A„n,j,a„ liiujiiiformi Jrsiu.'nii : 



smooth ; .spire rais(Hl, coiiieul, whorls tive, last i opercido tcntiissitiw, hyaliiw. 



vcntriecise ; aperture pyril'orm, columella acu- | The inflated Atlanta. Shell white, nautilus-shaped, 



minuted, produced ; outer lip sinuuted in thi 



mid.lle. 

 SniLKYIT. Voy. Honite, Moll.. I'l XI II. 

 Ilab. Australian seas. 



Species 4i). (IVIus. lint.) 



SriKlAM.S AKC'''ICA. Spi. IrshI .s/)//i/r/i(T«,, -(//..//,.,<,/, .s'/i/Vd' 

 p(irr,laiifnu-fihi,s //-////.s-, l,rrri.-!si„ii.-^. nHiiim iiuujiio. 

 uinbiUcato ; apertiird mnijiul, coluincl/d recta. 



TiiK ARCTIC SriRiALis. Shell subdepres.sed-globose ; 

 spire small, whorls three, veiy short, last large, 

 umbilicated; aperture large, coliiuiella straight. 



FAHRinus. (Limacina.) 



l.iinacina helicialis. Lamarck. 



Hah. Greenland. 



The writer scarcely sees any r 

 the heliciform from the fusifo 

 shells of these Pteropoda. 



m for sejwrating 

 sinistral, spiral 



Species 41. (Mus. r 



SPIRIALIS CLATHRATLS. Spi. f<.-!f,l.j){xij: 



ohliquhpnncturat(i-<li idlil.xpiid hrrr, 

 tihus paucis, liHiuiu iiijlahi: nprr 

 cohimelld elomjald, teniii, aciimimilii. 



The LATTICED Spirialis. Shell fasif'oriu, hyaline, 

 obliquely puncture-striated; spire very short, 

 whorls few, last inflated ; aperture oblong, co- 

 lumella elongated, thin, acuminated. 



Soui.EYET. Ed. etSoul. Voy. IJouite. :\l(.l 

 f. 17. 



H„h. Atlantic. 



,.hhnt,, 



PI. XIII. 



nearly symmetrical ; apical whorls hidden ; la.st 



umbilicated slightly, keeled on the outer side ; 



aperture subtrigonal ; outer lip terminating in a 



long tongue-shaped process. 

 Rang and Souletet. Mon. Pterop., PL XIV. f. 4. 

 Heliconides. D'Orbigny. 

 Hal. ? 



SimiSIGERA. 

 Geims SINUSIGERA. irOrhi,j,uj. 

 Testa xidiiiluhoM, medio anfmetilt itlfinii .■iidcafa. aper- 

 turd suhuratd. lain, sinuata. n'fe.r„, hiluhat,.. 

 Opercuhmi iijtiutinn. 

 Shell subglobose, sulcated in the middle of the last 

 wliorl ; aperture subovate, outer lip sinuated. 

 reflected, bilobed. Operculum unknown. 

 Synonym. Chelifropis. Forbes. 



Species 43. (Mus. Brit.) 

 SixUsh;EKA CANCELLATA. iSiiiH. fe.'<td .<i(b,jlidj, 



u:iiial.<. 



'/"■'■'"" 



IK? tenniiiuM expaiisd. dirix,!. 



The cancellated sinusickiia. Shell subglobo.se. 

 obliquely cancellated, spire rather conical ; 

 whorls five, rounded; aperture subovate, outer 

 lip sinuated, bilobed, strongly reflected ; lobes 

 produced, u]iper expanded, divided at the end. 



DT)Kni,:N-Y. Adams. Geneni, Plate CXXXVII. f. 4. 



Hah. > 



