— 364 — 



munito^ extus valide varicoso, eolumellari appresso, Irans- 

 versim [circa 10) multiplicato.— Long. 9 1/2, lat. max. 

 4 milL; apert. 5 mill. lotiga, 1 lata. (Mus. Burdigalense.) 

 Habit. Ins. Art, Archipel. Caled. (R. P. Montrouzier.) 

 Spécimen unicum vidi. 



5. RissoiNA Artensis, Montrouzier. 



Rissoina Artensis, Montrouzier in sched. 



Test, fusiformis, apice acuminata, turriculata, basi sub- 

 compressa, alba, sœpe sedimento nigrescente vel rubello 

 induta;anfr. 10 subconvexi, spiraliter dense et tenuis- 

 sime impresso-striati, primi 2 embryonales lœvigati, se- 

 quentes 4-5 lente accrescentes, scalarif ormes, costulis 

 obliquis interstitia haud œquantibus ornati, sutura pro- 

 funda discreti, costulis crenulati, cœteri sat rapide cres- 

 centes, sutura depressa, crenulata separati, ultimus sub- 

 ascendens, basi subcompressus ; apertura alba, subobliqua, 

 semilunaris, superne angulata, inferne subcanaliculata ; 

 margine dextro subacuto, infra médium expatisiusculo, 

 extus varicose marginato, varice circa basin marginis co- 

 lumellaris appressi continuante. — Long. 8 1/2, lat. max. 

 2 1/2 mill.; apert. 2 3/4 mill. longa, 1 3/4 lata. (Mus. Bur- 

 digalense.) 



Habit. Ins. Art, Arcliip. Caledon. (R. P. Montrouzier.) 



6. Rissoina subconcinna, Souverbie. 



Test, subabbreviato- fusiformis, apice acuta, longitudi- 

 naliter costulata, basi spiraliter striatula, alba, vel ru- 

 bella, vel alba, rubello balteata; anfr. 10 subconvexi 

 [embryonales 1 1/2, lœvigati], sutura impressa discreti, 

 costis numerosis impressi, subelevatis, usque ad basin con- 



