274 KEY. E. B. WATSON ON THE 



21. Area scahra, 1795, PoH, Test. Sicil. ii. 145, xxv. 22 ; Kobelt, 



Conch.-Cab. 2nd ed. Tin. pt. 2, p. 141, xxxvi. 5, 6. Sah. 

 Mediterranean. — Mr. Lowe got, in Labra near Punta de Sao 

 Lourengo, in 1829, one valve of an Area in crevices of a 

 stone with Gorgonia. It differs from all the other Madeiran 

 species, and I feel constrainedto accept his determination of it. 



22. Area tetragona, 1795, Poli, Test. Utr. Sicil. ii. 137, xxv. 12, 

 13 : Gwyn Jeffreys, Brit. Conch, ii. 180, iv. 5^; & v. 176, 

 XXX. 6. Hal). Prom Pinmark to the Mediterranean and 

 the Canaries. (M., L., N., Jn., W.) Everywhere, very com- 

 mon, but scarcely ever full-grown. 



23. Argiope decollata, 1784, Chemnitz (as Anomia), Conch.-Cab. 

 VIII. 96, Ixxviii. 705 : Grwyn Jeffreys, Brit. Conch, ii. 18 ; & 

 V. 164, xix. 3. Sab. Prom Guernsey to the ^gean and the 

 Canaries. (M., L., Jn., W.) Very common. 



24. Argonauta argo, 1758, Linne, Syst Nat. p. 708 ; Woodward, 



Manual Moll. p. 66, fig. 32. (W.) Porto Santo. One per- 

 fect specimen. 



25. Assiminea litorina, 1825-30, d. Chiaje (as Helix), Mem. An. 

 s. Vert. III. 215, xlix. 36-38 : Gwyn Jeffreys, Brit. Conch. 

 Y. 101, xcvii. 6. Hah. S.W. England to Mediterranean and 

 Tenerife. (L., Jn., W.) Madeira and Selvagens. Not un- 

 common. 



26. Atlanta Peronii, 1817, Lesueur, Jour, de Phys. lxxxy. 390, 

 ii. 1 ,; Woodward, Man. Moll. p. 200, pi. xiv. 21-23.— A 

 pelagic species. Everywhere ; Madeira and Porto Santo. 

 Common. 



27. Atys Jeffreysi, 1868, Weinkauff (as Gylichna), Conch. Mit- 



telm. II. 199 ; Monterosato, Nomenclatura, p. 145 (as 

 Moxaniella). — No good figure exists of this species. Brocchi, 

 who {teste Pbilippi) erroneously identified it with Bulla 

 ovulata. Lam., gives a figure which resembles B. redacta, 

 Desh., much more than it resembles either the B. ovulata, 

 Lam., or the Mediterranean or Madeiran species. Jeffreys's 

 figure (Ann. & Mag. 1856, vol. xvii. 188, ii. 18, 19), though 

 better, is not characteristic. The B. semistriata, Desh. Coq. 

 foss. Paris, ii. 44, pi. v. 27, 28), offers as good a representation 

 of this species as any I knovr. — Hab. Mediterranean. (N., 

 Jn., W.) Everywhere ; excessively common. 



28. Auricula cequalis, 1832-341,110^6 (as Melampus; 186^, Auri- 



cula), Zool. Jour. Y. 288, xiii. 1-5 ; Gray, Moll. Anim. in. 



