1 ítO MOI.LUSCA TERRESTRIA ET FLUVIATILIA 



siibrnarginata conjuncti, iillimiis ^3 lorigitiidiriis siihapqiians; apertura ovato- 

 Mitiiiidala, iiec expansa, exterioiL' marííint'. aciito, interioro ad columcllani latiiis- 

 oiilam, |)laiialain reflexo, sui)eriie ciiin exteriore jiincto; operculum lutesceiís, 

 (lensuin, siibí,'labratiim, nurleo párvulo, irilus ad basin sito. (JelTreys) — Ani- 

 mal iiiterrupte et celeriler sub aqua repeiis, corpora albo, roslro elongato, oculis 

 iiigris, pede oblongo, albo v. caerulescotite. 

 Long. 2, larg. 1 mill. 



Rissoa picta, Jeffr. Ann. and Mag. of .\al. Ilisl. jun. I8()7 



Habitai liaiid raia in Madera juxta Scisal, S. Cruz, Goríjiilho, cum R.-gla- 

 brata Phil. socialis, in arenosis inaritimis la|iidibus liaerens ad maris viciniam. 



Obs. I.* A R.-glabrata Philip, et R.-striala Mont. testa ventricosiore, nia- 

 cnlis plurimis, aliisque notis pliii imiiin dilTert. 



Obs. á.' A U.-semistriata Muni., ciii valile [iroxima, minore testa, anfracti- 

 hus compiessioiilms. scuiptnra aeipiali, nec ad anlVacliim nllinmin sn|»i'a et infi^a 

 liuiilata, coloralis maculis triserialini nec biserialiin lantiiin ad nllimum aiilVa- 

 ctiMii, macularam scriebus duabus circa anfraclus caeteros disposilis. 



Species pulcherrima, a congenerilius vaMe disliiirla. a testa regulariter ma- 

 ciilala nonieu accepit. 



rrinuiin anno 1860 a clariss Rev.'' Watsono detecta; anuo 1807 clariss. B. 

 Heresowskus egomet(|ne inveninins. 



Obs. In l\Iadera species aliae cerle adsnnt in arenosis maritiniis, ipiae a cla- 

 riss. Rev.'' Walsono, H. Reresowsko et mi'ips() recentes invenlae: liic descriliere 

 milii tanien non licet, ipioniani clariss. Rrv.'' Walsonus ad clariss. Jeffreysum 

 propter examinandas et describendas misil. 



Classis 2/ CONCMIFERA, .s. bivalves 



Laiiiclli-braiidiialac, Blainville 



Teslae bivalves, vahis elástico ligamento adjunctis, relaxato apertis, per 

 denlatum ailiculum contracto clausis. — .\nimal aerem in atjuis contentum bran- 

 cliiis spirans, uti)luriniúm maie inbabitans. 



Sííctio Siplioiiosloinalii, Flemiiií; 

 .\.nimal siplionibus munitum, palli lobulis [)lus ininus connexis instructnm. 



