— 465 - 



Cyclostrema Willei Friele. T. depressa, solida, 

 alba, late et profunde umbilicata, striis subtilissimis spiralibus 

 inferne distinctioribus sculpta; anfr. 3, ult. tumidus; spira 

 parum elevata ; apert. circularis, labro continuo haud labiato. — 

 Alt. 1, diam. 1,3 Mm. Friele angl. 



Cyclostrema Willei Friele Nordh. Exp. II p. 34 T. 11, F. 19. 



Hab. mare arcticum. 



Fissurisepta rostrata Seguenza. T. minima, 

 tenuis, elata, ovato-conica, lateribus leviter impressis, antice 

 convexiuscula, postice leviter concava, vitracea, lineis obliquis 

 regularibus leviter granulosis sculpta, foramine parvo rotundato 

 basi j)arallelo; margine tenuissimo; apertura postice vix latiore ; 

 latus internum vitraceum; septum elongatum, pariete posteriori 

 parallelum. — Long. 2,6, lat. 1,6, alt. 2,4 Mm. Watson. 



Puiicturella (Fissurisepta) rostrata. Seg. — Watson Eep. Clialleuger 



Gastropod. p. 48 T. 4, F. 10. 



Hab. oceanum atlanticum borealem. 



(Siphonariidis adde:) 



2. Genus Anisomyon Meek. 



(Allerya Morch, Scutulum Monteros., Williamia Monteros.). 



T. ancyliformis, parva, tenuis, apice subcentrali, in pullis 

 spirato. 



A n i s m y n G u s s o n i i C o s t a. T. ancyliformis, tenuis- 

 sima, pellucida, laevissima, obovata, gibba, rufo-fulva, vertice 

 acuto, versus marginem intlexo, saepe ei superposito. — Long. 

 7, lat. 6 Mm. Phil. 



Ancylus Gussonii Costa Cat. p. 120. — (Pat.) Philippi Enum. II 

 p. 84. — (Gadinia) Jeifreys Ann. nat. hist. IBTOp. 1. — (Piliscus) 

 Morch J. C. 1877 p. 210. — (Scutulum) Monteros. Ann. Mus. 

 civico Geuova 187(3 p. 427. - (Anisom.) Dall J. C. XXVII 1879 

 p. 288. — (Williamia) Monteros. Nomencl. p. 150. — (Tectura) 

 Locard Cat. p. 346. 

 Patella pellucida Philippi Enum. I p. 111 T. 7, F. 7. 

 Tectura virginea Weiukauff Mittelm. p. 406. 

 Patelloidea vitrea Cantraine Diagnoses p. 395. 

 Hab. mare mediterraneum. 



Neaera exigua Jeffreys. T. ovato-globosa, tenuis, 

 semijjellucida, nitens, laevissima, versus marginem tantum striis 

 paucis concentricis sculpta, albida; margo anticus et ventralis 

 rotundati, posticus incurvatus et breviter rostratus; umbones 

 prominuli, apicibus minimis, mamillaribus, antrorsum incurvatis-; 

 cartilago parvus, triangularis ; fovea triangularis ; cardo antice 

 leviter arcuatus, postice incurvatus, in valv. dextra dente brevius- 

 culo triangulari laterali postico munitus. — Long. 4, alt. 2,-5 Mm. 

 Jeffreys angl. 



Neaera exigua Jeffreys Ann. Mag. (4) 18 p. 496. 

 Hab. in abyssis oceani atlantici, prof. 3400 m. 



;;o 



