— 201 — 



tis 3, ult. cingulis 9—10 cincti, in interstitiis tenuissime longi- 

 tudinaliter striati ; apert. ovata, superne angulata. spiram fere 

 aequans; labrum simplex, cingulis excurrentibus denticulatum. — 

 Long. vix 2 Mm. 



Kissoa tenera Philippi Emim. II p. 128 T. 23, F. 15. - Weinkauif 



Mittelm. p. 314. — Monteros. Enum. p. 25. — M. Ch. II p 176 



T. 22, F. 16. 



Hab. ad Siciliam. 



98. Rissoa tenuisculpta Watson, T. vix rimata, 

 cylindrico-oblonga, tenuis, nitida, pellucida, spira elongata, cy- 

 lindrico-conica, "apice obtusulo, leviter inverso; anfr. 5—6 con- 

 vexi, regulariter crescentes, sutura parum obliqua, profunda 

 discreti, striis incrementi lineisque spiralibus subtilissimis sculpti ; 

 unicolor lutescenti-albida, apert. exacte ovalis, superne vix acu- 

 minata; labro tenui, sed haud acuto, basin versus protracto et 

 leviter expanso, margine columellari haud appresso, rimam um- 

 bilicalem formante. — Long. 2 Mm. 



Rissoa temiisculpta Watson Pr. Z. S. 1873 p. 389 T. 36, F, 28. — 

 Monteros. Nuov. Riv. p. 28. - M. Ch. II p. 148 T. 18, F. 6-7. 

 — Locard Cat. p. 267. 

 Hab. Mare mediterraneum, lusitanicum et litora Maderae. 



99. Rissoa Testae Arad. et Maggiore. T. ovata, 

 subelongata, solidiuscula, transparens, albida; spira subturrita, 

 apice obtusulo; anfr. 6 convexiusculi, sutura profunda discreti, 

 plicis elevatis sat distantibus, basin versus evanidis, lirisque 

 spiralibus minus elevatis 8 — 9 in anfr, ult. subcancellata ; apert. 

 ovata, supra acuminata, basi effusa; labro acuto, extus vari- 

 coso. — Long, 3—4 Mm. 



Rissoa Testae Arad. et Magg. Cat. Catania p. 207. — Monteros. En 

 p. 68. - Jeffreys Pr. Z S 1884 p. 105 T. 9, F. 4. — M Ch. II 

 p. 179 T. 23. F. 9, 10. 

 Rissoa abyssicola var. conformis Jeffreys Ann. Mag. 1870 June 

 p. J3. 

 Var. brevior, sculptura minus distincta : 



Rissoa abyssicola Jeffreys Br. Conch. IV p. 19 T. 66, F. 9. - Forbes 

 et Hanley III p. 86 T. 78, F. 1, 2 



Hab. Mare profundum a Norvegia usqueadmediterraneum. 

 100. Rissoa (Cingula) tumidula Sars. T. minuta, 

 tenuis, semipellucida, cornea, tumidula, fere globosa, spira brevi, 

 apice obtuso; anfractibus 4 valde ventricosis, ultimo aequaliter 

 convexo spira longiore; sutura profundissima ; apertura irregu- 

 lariter orbiculari, subangulata; umbilico distincto, rimaeformi. 

 Superficies lineis spiralibus numerosis tenuissimis ubique ob- 

 ducta. — Sars. Long. 2,5 Mm. 



Cingula tumidula Sars MoU. reg. arct. Norveg, p. 174 T. 10, F, 1. 

 Hab, ad Norvegiam arcticam. 



lOL Rissoa turgida Jeffreys. T, minuta, tenuis, 

 pellucida, alba vel pallide tlavescens, ovato-conoidea, laevissima, 

 nitidula, ad peripheriam linea singula spirali obducta; spira 



