140 



5. LiTTORiNA SiTKANA. Lit. testd transversim ovūtci, obtustttsculd, 

 castaned, transversim grosse sulcatd ; anfractibus roiundatis, ul- 

 timo dilatato ; aperturd ovatd, patuld ; columelld albd, vix dila- 

 tatd, sulco umbilicari exaratd. 



Altit. 6, diam. 6, altit. aperturae 4i. 



Hab. ad Sitka, Nova Albion (on rocks, half-tide) ; collected by 

 Mr. Barclay. 



Very nearly allied to L. groenlandica, but more depressed, blunt, 

 the aperture more dilated. The elevated transverse lines are threa 

 in number on the upper volutions, about twelve on the lašt. 



6. LiTTORiNA GLABRATA. Lit. testd ovūto-oblougd, acutd, albido- 

 carned, strigis pallide fuscis oblicuis pictd ; anfractibus parūm 

 convexis, lavibus, supremis sub lente lineis impressis 6—8 exaratis, 

 ultimo basi angulato ; aperturd ovatd, rufd ; columelld depressd, 

 violaced. 



Altit. 8į, diam. 6, altit. aperturae 4^5 lin. 



Hab. ad Payta Peru (on rocks, half-tide) ; Cuming. Ad Caput 

 Natale (Wahlberg). 



Perhaps oniy a variety of L. obesa, Sow., though easily distin- 

 guished by the pale obliąue longitudinal lines : very likę L. ziczac, 

 D'Orb. (non Chemn.) 



7. LiTTOHiNA LiEvis. Lit.testd ovato-oblongd, ttcutd.albidd.cinereo- 

 marmoratd ; anfractibus pariim convexis, Icsvissitnis (sub lente 

 fortiori vix tenuissime striatis) ; ultimo basi obscure angulato ; 



aperturd ovatd, fusco-violaced, basi albido-fasciatd ; columelld 



depressd, violaced. 

 Altit. S\, diam. 6, altit. aperturae 5 lin. 

 Hab. Unknown. 

 'lliis species scarcely diflFers, except in colouring, from L. obesa. 



8. LiTTORiNA DEBiLis. Lit. tcstd parvd, ovūto-oblongd, ūcutd, tcnui, 

 carulescente-albidd, interdum lineis obliquis pallidissime fuscis 

 pictd, apice obscuro ; anfractibus leeviusculis (sub lente lineis con- 

 fertis impressis sculptis), ultimo basi angulato ; aperturd ovato- 



oblongd, rufd, basi productd et subangulatd ; columelld pariim 

 depressd, fuscescente. 

 Altit. 4i, diam. 3, altit. aperturae 2^ lin. 

 Hab. Unknovvn. 



A L. glabrata in miniature ; it difFers hovvever essentially from 

 that species by its aperture, ■vvhich is produced into a distinct angle 

 at the base. 



9. LiTTORiNA Sayi. Lit. tcstd ovato-oblongd, acutd, solidiusculd, 

 transversim inultisulcatd, albd, punctis pallide rufis ornatd; spird 

 violacescente ; anfractibus convexiusculis, suturd profundd divisis; 

 aperturd ovato-orbiculari ; columelld rvfd; labro intus albo. 



Altit. 9, diam. 65, altit. aperturae 5 lin. 

 Hab. ad Floridam (commuiiicated by Say). 



