— 382 — 



dorsali antico leviter, postico fortiter declivi, uiiiljouilnis niagnis 

 et tumidis in '/4 postica sitis ; valvulae solidulac, seniijiellucidae, 

 sublaeves, epiderniide luteo-virescente nitida tectae, intus leviter 

 inargaritaceae, laniina cardinali sat tbrti, dentibus anterioribus 

 niulto majoribus, elongatis, intus aciem acutam sat elevatam 

 formantibus. — Long. 2 Mm. Sars. 



Moiitacuta Maltzaui Verkriizeu Jalirb. Mal. Ges. II p. 229, T. 8, 

 F. 8. - Sars Norv. p. 69 T. 19, F. 19. 



Montacuta auouiala Jeftreys Mss. 



Hab. ad Norvegiam arcticara. 



5. Montacuta Voeringi Friele. T. alba, ovata, con- 

 vexiuscula, inaequihiteralis, umbonibus anterioribus i^rominulis; 

 laevis, bic illic vestigiis incrementi sculpta, plerumque limo 

 crasso fusco vestita; cardo fortis dentibus prominentibus. — 

 Long. 3, alt. 2,6 Mm. Friele angl. 



Moutacuta Voeriugi Friele Nyt Mag. 23 p. 1 F. 1. — Nordli. Exp. II 

 p. 37 T. 12, F, 11, 12. - .Jeffreys Pr. Z. .S. 1881 p (397. 

 Hab. in abyssis oceani atlantici nec non mediterranei prope 

 Panormum. 



6. M n t a c u t a p u r a S m i t h. T. elongata, valde inaequi- 

 lateralis, tenuissima, alba, lineis incrementi tenuibus striata, 

 utrinque rotundata, postice ])aulo angustata ; inargo dorsi anticus 

 elongatus, levissime arcuatus, fere horizontahs, posticus brevior, 

 oblique curvatus; inargo inferior latissime curvatus; umbones 

 parvi, paulo supra marginem producti, ad apicem obtusi, longe 

 pone medium collocati; dens cardinalis unicus in valva dextra 

 infra apicem situs, in sinistra nullus. — Long. 6,5, alt. 4, diam. 

 22/3 mm. Smith. 



Moutacuta pura Smitli Clialleuger p. 207 T. 12, F. 6. 

 Hab. in abyssis maris lusitanici. 



7. Montacuta pellucida Jeffreys. T. ovahs, con- 

 vexa, tenuis, pellucida, nitens, concentrice distincte striata, 

 albida, extr. postica breviore subtruncata, anteriore elongata 

 subex])ansa, margine dorsali utrinque declivi; umbones proniinuh, 

 calyciformes, submediani ; fovea cartilaginis parva, subumbonahs, 

 marginibus incrassatis; dentes in unica valva exstante lamelli- 

 formes, anterior duplo major. — Long. 3 Mm. Jelireys angh 



Moutacuta pellucida Jeffreys Pr. Z. S. 1881 p. 697 T. 61, F. 3. 

 Hab. Adventure Bank Mediterranei. 



8. Montacuta ovata Jeffreys. T. rotundato-trigona, 

 convexiuscula, modice sohda, haud nitens, laevis, albida; extr, 

 postica subite truncata, antica elevata, rotundata ; umbones parvi, 

 intlexi, ad ^/5 long. ant. siti; dentes valv. dextrae breves, V-formes, 

 sinistrae lamelhformes. — Long. 2 Mm. Jeffrevs angL 



Montacuta ovata Jeffreys Pr. Z. S. 1881 p. 698 f, 61, F. 4. 

 Hab. in abyssis oceani atlantici et mediterranei. 



9. Montacuta (TelHmya) ferruginosa Montagu. 

 T. sat convexa, oblonga vel elhptica, extr. antica rotundato- 



