- 202 - 



breviuscula, apice obtuse rotundato; anfr. 5 convexi, ult. basin 

 versus dilatatus, 2/3 testae occupans; sutura distincteimpressa; 

 apert, oblique expansa, rotundato-ovata, iabro acqualiter arcuato, 

 tenui, laevi, varice nullo, interno supine inconspicuo^ rima um- 

 bilicali distincta. - Long. 2,2 Mm. 



Rissoa turgida Jeffreys Ann. Mag. 1870. — Sars Norv. p. 183 

 T. 10, F. 12 - M. Ch. II p. 162 T. 20, F. 5. 8. - (Pseudosetia) 

 Monterosato Nomencl. p. 75. 

 Rissoa obtusispira Seg. et R. oblita Tib. teste Monteros. 

 Hab. ad Norvegiam borealem. 



102. Rissoa turricula Jeffreys. T. minute rimata, 

 turrita, tenuis, semipellucida, nitidula, albida; spira acuta, apice 

 leviter obliquo; anfr. 4 tumidi, regulariter crescentes, sutura 

 prolunde excavata divisi, costis leviter curvatis tenuibus circa 

 20—25 in anfr. ult. et penult. sculpti, spiraliter haud striati; 

 apert. rotundata, labro acuto, intus laevi, labio super partem 

 inferiorem columellae refiexo. — Long. 1,2, diam. 0,8 Mm. 



Eissoa turricula Jeffreys Pr Z. S. 1884 p. 120 T. 9, F. 6. — M. 

 Ch. II p. 1^0 T. '23, F 11, 1-2. 

 Hab. Oceanum atlanticum; an subfossilis? 

 1(3. Rissoa variabilis Miihlfeldt. T. solida, magna, 

 turrita vel turrito-elongata ; spira conica, acuta, interdum acu- 

 minata; anfr. 7—9 convexis, subangulatis , costis 10- 12 long. 

 et lineis impressis ^piralibus punctulatis sculptis; apert. ovato- 

 elongata, superne rotundata, inferne expansa, labro extus et 

 intus varice incrassato; labio ad basin libero. Albida vel brun- 

 nea, lineis obscuris transversis jiunctulatis, non raro etiam ad 

 basin fascia obscura ornata, peristomate violaceo. — Long. 9, 

 diam. 3,4 Mm. Schwarz. 



Eissoa variabilis (Turbo) Miihlfeldt Berl. Verh. 1824 p. 212. — 

 Schwarz Riss. p. 44 T 3, F. 35. - Weinkauff Mittelm. p. 298. 

 Mart. Ch. II T. 4, F. 31, 32. - Reeve Conch. ic. sp. 77. — Buc- 

 quoy T. 31, F. 4 5. — Locard Cat p. 255. - Monterosato 

 Nomencl. p. 57. 

 Rissoa costata Desmarest BuU Bordeaux p 7 T. 1, F. 1. 2. — 



Desh. Lam VIII p 471. — Phii. Enum. I p. 157. 

 Rissoa costulata Risso Europe n^erid p 119 nec Alder. ,. 

 Rissoa Desmaresti Recluz Rev. zool. 1843 p. 9. 

 Rissoa splendida Sow. in Reeve Conch. icou. uec Eichw. 

 Turbo Rissoanus delle Chiaje-Poli III p. 213 

 Rissoa nodulifera et punctata Kiister. 

 Rissoa protensa et neglecta Locard Cat. p. 256. 

 Hab. Mare mediterraneum. 



104. Rissoa ventricosa Desmarest T. solida, ovata, 

 oblonga, spira conica, acuminata; anfr. 8 planiusculis, infra 

 versus suturam convexioribus, celeiiter accrescentibus, costis 

 circa 12 latis paullo elevatis, ult. permagno, ventricoso, costis 

 abbreviatis et striis subtihssiniis punctulatis transversis; apert. 

 magna, ovato-elongata, superiie expanso-rotundata ; labro repando 



