1861.] DR. DUNKER ON NEW SOLENACEA. 425 



Forma angusta, regularis, convexa. Loco radiorum, quibus or- 

 nantur Maclia strigilata aliseque species, testa aliquautulum coar- 

 ctata est. Cardiuis structura M. strigilatce plane respondet. 



Hab. In littore AustraKae orientalis {Mr. Strange). 



29. Macha cumingiana, Dkr. 



Testa ovali-oilonga, convexa, angusta, utrinque rotundata, alba, striis 

 incrementi concentricis Uneisque obliqiiis elevatis subtilibus in- 

 structa, epidermide sordida, tenui, decidua, sublamellosa induta ; 

 umbones parvuU, antemediani, obtusi ; basis dorso subparallela. 

 Long. 41, alt. 17, lat. 11 mm. 



Hsec species Machce quoyi Desh. similis est, sed statura angustiore, 

 raargine dorsi et basi fere parallelis, umbonibus obtusis vix promi- 

 nentibus lineisque obliqnis minoribus satis differt. 

 Hab. In Antillis insulis {H. Cuming). 



30. AzoR OBLONGUS, Dkr. 



Testa ovali-oblonga, solida, alba, antice rotundata, postice producta, 

 oblique subtruncata, concentrice rugoso-striata, epidermide cornea 

 decidua vestita, canali lato ab umbonibus ad basin decurrente in- 

 signis ; ligamentum crassum, prominens ; umbones obtusi, ut solent, 

 antemediani. 

 Long. 73, alt. 31, lat. 17 mm. 



Ab Azore scheepmakeri Dkr. testa angustiore, postice producti- 

 ore necnon margine dorsi postico aliquantulum sinuato pro specie 

 geriuina differre videtur. 



Hab. Ad insulam Luzon Philippinarum (H. Cuming). 



I 31. AzoR soLiDus, Dkr. 



Testa ovali-oblonga, solida, alba, ut7-inque rotundata, in basi sub- 

 arcuata, in dorso cvrvata, concentrice rugoso-striata, epidermide 

 olivacea, decidua, murgines versus himellosa induta, canali obsoleto 

 ab umbonibus obtusis decurrente instructa. 



Specimen quod exstat maximum 65 mm. longum, 31 altum, et 18 

 latum est. 



Nescio an sit melius jungendus cum Azore scheepmakeri. 



Hab. In insulis Pbilippinis {H. Cuming). 



32. AzoR MiNUTUS, Dkr. 



Testa minuta, ovali-oblonga, subelliptica, tenuis, lactea, subpellucida, 

 concentrice tenerrimeque striata, epidei-niide pallide cornea ob- 

 ducta ; sulcus ab umbonibus decurrens, vix conspicuus ; altera val- 

 vula bidentata, altera unidentata, ita ut denticuli valvulce dextrcB 

 erecti dentem parvulum valves oppositcB recipiant. 



Long. 17, alt. 8, lat. 4 mm. 



Fortasse speciei cujusdam pullus est. 



Hab. In insula Bureas Philippinarum {H. Cuming). 



