﻿KISSOA.— Plate IX. 



Species 81. (Mus. Man-at.) 



RiSSOA LIGNEA. Bis. (AJvani'a) tenia hreoi, veiitricosd, 

 soltdd,fiiscd, acuminata, rubro-Uiieatd ; anfractihus 

 hrevihus costatis, costis rotimdis, crassis, orenatis ; 

 liris spiralihus tenuihtcs ; aperfnrd brevi, suh- 

 rotundd, eolumelld crassd, albd ; lahio extcrno 

 iniiis incrassato ; extns varicoso. 



The woody Kissoa. Shell short, venti-icose, solid, 

 brown, acuminated, red-lined ; whorls short, 

 ribbed, ribs rounded, thick, crenated ; spiral 

 ridges thin ; aperture short, rather round, 

 columella thick, white ; outer lip thickened with- 

 in, varicose without. 



Thorpe. Brit. Mar. Conch. 



Hah. Nice. 



rrl.rlrnslal 

 ,-rn,i,htti 



Species 82. (Hab. Marrat.) 

 EissoaCanakiexsis. TiU. (Alnnun) if'std „<;, 



fnird, hrrri, ,■,„..,;, ?„„,,//., /;»„/;/,.■ ,■ 



spiralltrr ^h'lisr li,i,vl,i ; ow/Zv rnfxs/s, 

 nnfractibiis panels, brevibus, macidaiis velspiralitcr 

 liuratis, medio subangulatis, ultimo veutricoso ; 

 iipirlard parvd, rotunda, lahio extcrno inmissafo. 



The Canary Island Rissoa. Shell minute, pale, ful- 

 vous, short, thick, numerously longitudinally- 

 ribbed, spirally closely ridged, ribs thick, crenu- 

 lated ; whorls few, short, spotted or spirally 

 1 ineated, rather angular in the middle, last ventri- 

 cose ; aperture small, rounded, outer lip thickened. 



D'Orbigny. Watson, Proc. Zool. Soc. 1873, p. 376. 



Ilab. Canary Islands, Madeira. 



Finer in sculpture than the other species, with 



ot-enulated ribs. 



Species 83. (Mus. Marrat.) 



Rissoa depicta. _Z?/,s-. testd parrd, ventricosd., fulrd, 

 tfiiiiHiT sjiifdiifer striatd, semipellucidd, obscarij 

 ■•ieriittini iiiaciilatd ; anfractibus qidnque, superiori- 

 biis Ireris.-iitnix, ultimo rotunda, subglohoso, aper- 

 tiird roiuiidd, labia externa crasso. 



The faded Rissoa. Shell small, ventricose, fulvous, 

 finely spirally striated, semipellucid, obscurely 

 spotted in rows ; whorls five, upper ones very 

 short, last rounded, rather gloliose ; aperture 

 rounded, outer lip thick. 



Manzoni. (Watson) Proc. Zool. Soc. 1873, p. 383. 



Hab. Madeira. 



It seems more globo.^e and less conical than lii-.-^oa 

 semidriata of Montagu. 



Species 84. (Mus. Montrouzier.) 



Rissoa Artensis. Bis. (Bissoina) testd ehmgatd, sub- 

 cijliiidricd, snhaurantid, teniii ; anfradibusnovem, 

 apicalibim septem levitcr plicatis, attcuaatis, prope 

 apicem sidjabrupte angustatis, pciinHimn snl. 

 ajlindrico, planaio, alto; ultimo cijIiiiJrii-n rlcn- 

 gafo; aperturd. subtriiiond, subeanaliculatd ; labia 

 interno tenui, eolumelld brevi, labia externa pro- 

 dado, incrassato. 



The Isl. of Akt Rissoa. Shell elongated, snbcylin- 

 drical, rather orange, thin ; whorls nine, seven 

 apical, slightly plaited, attenuated near the apex, 

 rather abruptly narrowed, last but one rather 

 cylindrical, flattened, high, last cylindrical, 

 elongated ; aperture subtrigonal, with a slight 

 canal, inner lip thin, columella short, outer lip 

 produced, thickened. 



MuNTUOUZiER. Journ. Conchyl. Vol. XX. p. 3G4, 

 1872. 



Hab. lie Art, New Caledonia. 



Species 85. (Mus. Souverbie.) 



KiSSOA SniiCONClNNA. Bis. {Bissnina) testd albd, ocatd, 

 sii.bpyramidtitd, altd, InigilndliudiUr rostatd, 

 ci>.-:tis tenuibiis leril.r ,i ,:■„., lis, ,hsl.,,itibus, in- 

 ti-rstitiis laivibus ; anfradihns nr/o, /.»/,;• crescenti- 

 bus, inferioribus subveutricosis ; aperturd sub- 

 trigond, labia interno tenui, expanso, columella 

 nniplicatd,, brevi, labia extcrno prodacto, expnnsOy 

 infra cohuuelhim emarginato. 



The eathee neat Rissoa. Shell white, ovately sub- 

 pyramidal, high, longitudinally ribbed, ribs thin, 

 slightly arched, distant, interstices smooth ; 

 whorls eight, slowly increased, lower rather 

 ventricose ; apei'ture subtrigonal, inner Up thin, 

 expanded, columella single plaited, short, outer 

 lip produced, expanded, emarg-inated under the 

 columella. 



SiiuvERBiE. Joum. Conchyl. Vol. XX. p. 30-t, 1872. 



Hah. He Art, New Caledonia. 



This sliell is named as above from its resemblance 



to Bissoina concinna of A. Adams, fi'om which it dif- 



fers materially in having no cross stria?. 



