OBSERVED AT MOGADOE. 185 



admirably represent the present singular variety of the same 

 species. 



72. Purpura Lapillus (L.), Buccinum Lapillus, Linn. ; Le Sadot, 

 Adans. 106. t. 7. f. 4. 



Although this very common British shell is thus figured and 

 described by Adanson amongst his shells of Senegal, he docs not 

 seem to have really found it on that coast, since, contrary to his 

 usual practice, he omits any precise specification of an actual 

 Senegal locality. The habitats he mentions are Port de 1' Orient 

 (in France), the island of Teneriffe in the Canaries, and that of 

 Payal in the A9ores ; and though the two latter habitats are cer- 

 tainly extremely doubtful (indeed in Tenerifie it may almost safely 

 be affirmed that the shell does not occur), yet his enumeration of 

 theni in the absence of his usual precise indication of any Senegal 

 locality is adverse to the notion of its having any better claim than 

 the Tenerifie Helix, Le Fouchet, to a place amongst his Senegal 

 shells. 



The abimdant occurrence, however, of a dwarf state or var. of 

 this shell at Mogador renders it not at all improbable that it may 

 be also found still further down the coast, and therefore possibly 

 in Senegal. Fresh observations to decide this point would there- 

 fore be extremely interesting. 



74. I cannot agree with Mr. Hanley (Conch. Linn. 221) in dis- 

 missing Adanson's Siger, 135. t. 9. f. 28, from the synonyms of C. 

 rustica (L.). On the contrary, Adanson's expression, "sillons 

 presque imperceptibles," appears to agree no less precisely with 

 the qualified term " Iseviuscula " of the Linnean diagnosis than 

 with the common Mediterranean, Madeiran, and Canarian shell 

 itself, as contrasted with the strongly-grooved C. mercatoria (L.), 

 or Le Staron, Adans. 137. t. 9. f. 29, figured immediately above 

 Le Siger, on the same plate. 



75. Columbella conulus (Oliv.). Buccinum comiculatum, Lam. 

 ed. 2. ix. 175. B. Unncei, Payr. Catal. 161. t. 8. ff". 10-12 ; Phil. 

 1. 225 (var. a). B. canariense, D'Orb. in W. B. ii. 2. 90. t. 6. 

 fi". 35-37. Length of specimens not exceeding 5 lines. — Differs 

 from C. Broderippii, Sowerb. in Proc. Zool. Soc. (1844) p. 53, in the 

 flat (not " subventricose ") volutions, and in the inside of the outer 

 lip being 4-6 or 7, instead of 2-3-toothed. 



78. Nassa incrassata (MiilL), F. and H. iii. 391. 1. 108. f. 3, 4. 

 BuccirMin macula, Mont., Payr. Catal. 157. t. 7. f. 14. B. Asca- 

 nias, Lam. ed. 2. x. 173. B. asperuhm, Phil. i. 220. B. Lace- 

 pedii, Payr. Catal. 161. t. 8. f. 13, 14. 



LINN. PROC. — ZOOLOGY. 13 



