— 204 — 



semipellucida, vitracea, pallide albido-flava, laevis, sub lente 

 fortiore tantum subtilissime spiraliter striata; spira gracilis, 

 elongata, subite truncata; anfr, 6 convexi, oblique convoluti, 

 inferi 3 fere aequales, ult. ^igoccupans; sutura profunda ; apert. 

 exacte ovalis, parva, leviter expansa ; labrum tenue, contractum, 

 superne incurvum; labrum reflexiusculum. — Long. 4 Mm. 



Rissoa vitrea (Turbo) Montagu Test. brit. p. 321 T. 12, F. 3. — 

 Forbes et Hanley III T. 7o, F. 5 , 6. — Sow. 111. Ind. T. 13, 

 F. 27. — Jeffreys Br. Conch. IV p. 40 T. 68, F. 4. - (Hyala) 

 Chenu Manuel F. 2154. — (Cinffula) Weinkauff Mittelm. p. 279. 



- M. Ch. II p. 155 T. 20, F. 16. 



Rissoa glabrata Flemiug nec Miihlf., crystallina Brown et virginea 

 Brown. 

 Hab. e mari germanico usque in mediterraneum. 



108. Rissoa Watsoni Scbwarz. T. oblongo-conica, 

 tenuis, transparens, nitens, subgradata, alba, in interstitiis prope 

 suturam fusco maculata ; anfr. 4^2 regulariter crescentes, superne 

 applanati, dein angulati, liris ii — 10 prominulis rotundatiS; qua- 

 rum 3 inajoribus, cingulati, interstitiis duplo latioribus, subtilis- 

 sime decussatis; spira producta apice hemispbaerico ; sutura 

 distincta sed haud profunda; apert. subcircularis , labro acuto, 

 extus remote paruin incrassato ; pariete aperturali vix callosa. — 

 Long. 2 Mm. 



Rissoa Watsoni Schwarz rass. — Watson Pr. Z. S. 1873 p. 375 

 T. 35, F. 11. - M. Ch. II p. 174 T 22, F. 10, 11. 

 Hab Mare lusitanicuin; litora Maderae. 



109. Rissoa Weinkauffi Schwaz. T. tenuis, albida 

 vel flavida, subpellucida, nitidiuscula, conico-oblonga; spira acuta; 

 anfr. 6 convexi, superne scalati, costulis longitudinalibus spira- 

 libusque profunde clathrati, sutura incisa sejuncti; anfr. ult. 

 costulis long. 16-18 rectis et continuis instructus; apert. ovata; 

 labrum erectum, subsinuatum, varice striis transversis nonnuUis 

 ornato incrassatum, intus laevigatum. — Long. 3, lat. 1,4 Mm. 



Rissoa dictyophora Weinkauff J. Conch. X p. 339, nec Phil — 



Alvania Weinkauft'i Schwarz mss. Weinkauff Mittelm. p. 312. — 



Monteros. J. Conch. XXV T. 3, F. 4. - Natur. Sicil. Ili p. 100. 



— Mart. Ch. II p. 169 T. 21, F. 14, 15. 

 Hab. ad Siciliam et Algeriam. 



110. Rissoa zetlandica Montagu. T, oblongo-ovata, 

 solida, subturrita, opaca, albida , spira acute producta; anfr. 7 

 sensim crescentes, sutura profunda discreti, superne contabulati, 

 dein angulati, liris spiralibus longitudinalibusque distantibus, 

 fere aequalibus fortiter cancellati, liris ad intersectionem fere 

 muricatis; anfr. ult. spiram haud aequans, Hris spiralibus 5, 

 basalibus niagis prominentibus, costisque basin versus evanidis 

 sculpta ; apert. rotundata oblique expansa, labro sat incrassato, 

 inferne aequaliter arcuato -- Long 5 Mm, 



Rissoa zetlandica (Turbo) Montagu Trans. Linn. Soc. XI p. 194 

 T. 13, F. 3. - Loven lud. p. 156. — Forbes et Hanley IH 



