1 14 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [Feb. 19, 



and stouter shell and has much coarser sculpture. Philippi's figure 

 represents quite another species, and he describes the outer lip as 

 thickened and grooved within. 



8. Rissoa lanci^;, Calcara. 



B. lancice, Calc. Moll. viv. e foss. Sicilia, 1845, p. 29, t. 4. f. 12. 



B. vhilippiana, Jeffr. in Ann. & Mag. N. H. 1856, p. 182, 

 pi. 11. f. 4, 5. 



'Porcupine' Exp. 1870: Med. St. Algeciras B., Adventure 

 Bank. 



Distribution. Mediterranean and Adriatic ; var. Alvania tessellata, 

 (Schwartz v. Mohrenstem) ; Algiers (Weinlcauff) ; 8-10 fins. 



Although Oalcara's description is too short and does not give all 

 the characters, it sufficiently agrees with mine, and I therefore adopt 

 his name, which is prior in date. 



v 9. Rissoa canariensis, d'Orbigny. 



B. canariensis, d'Orb. Moll. Can. 1837, p. 78, pi. vi. f. 5-7. 



' Porcupine' Exp. 1870 : Atl. St. 16. A single specimen. 



Distribution. Mediterranean from the Gulf of Marseilles to Sicily, 

 Canaries, and Madeira ; 0-120 fms. 



Fossil. Miocene : Madeira (Mayer). 



10. Rissoa punctura, Montagu. 



Turbo punctura, Mont. Test. Brit. p. 320, t. 12. f. 5. 



B. punctura, B. C. iv. p. 17 ; v. p. 207, pi. lxvi. f. 8. 



'Porcupine' Exp. 1869: St. 18. 1870: Atl. 3a, Vigo B., 36, 

 Tangier B. (var.) ; Med. 50, Adventure Bank. The Tangier speci- 

 mens are smaller and slender, with more delicate sculpture. 



Distribution. Finmark aud Faroe Isles to the Mediterranean and 

 Adriatic, Canaries (McAndrew) ; 0-130 fms. 



Fossil. Pliocene : Coralline Crag, S.W. France, Italy, Rhodes. 

 Post-tertiary : Scandinavia, Ayrshire, Portrush, Selsea ; 0-100 ft. 



There are some obscure and obsolete synonyms. 



11, Rissoa parvula 1 , Jeffreys. (Plate IX. fig. 2.) 



Shell oblong, comparatively solid, semitransparent, nearly lustre- 

 less : sculpture consisting of about 20 longitudinal and somewhat 

 curved riblets on the body-whorl, which are not continued much 

 below the periphery ; each of the two succeeding whorls has 14 to 

 16 similar riblets ; all of these are crossed by spiral riblets or striae, 

 of which there are about 10 on the body-whorl and 4 to 6 on the pen- 

 ultimate aud nest whorls ; tbe topmost whorl is encircled by micro- 

 scopic lines ; the intercrossing of the longitudinal and spiral riblets 

 does not form tubercles or prickles at the points of junction ; the 

 interstices are square : colour pale yellowish : spire rather slender : 

 whorls 4, slightly convex, the last occupying two thirds of the spire ; 

 apex blunt: suture distinct, but rot deep: mouth more round than 



1 Very email. 



