17G EEV. B. T. Lowe's list of shells 



(freshwater) South of Spain, and two {Trochus Ultonice and T. 

 carncus) Mogadorian, make up the whole number, ninety. 



Notes on the pi'ecedmg List. 



No. 13. La Calcinelle, Adans. 232, t. 17. f. 18; Lutraria pipe- 

 rata, Lam. 



14. Donax anatinus, Lam. — Precisely identical with the common 

 British species, the hinge having one lateral tooth in the left valve, 

 locking between two in the right, close to the end of the nymphas 

 on the short posterior side, exactly as in English specimens. The 

 true I), trunculus, L., is at once distinguished by the absence of 

 these lateral teeth. 



21. Tapes Fullastra (Mont.), F. H. ii. 382, t. 25. f. 2, 3 ; Le 

 Lunot, Adans. 227, 1. 17. f. 11. 



22. This Venus may just possibly prove to be the true Mediter- 

 ranean V. gallina, L., for I examined it only cursorily, and 

 unfortunately neglected to bring away specimens. It seemed to 

 be abundant. 



31. JJnio hisjHinus, Moq.-Taud. Eossm. Ic. xii. 26, t. 56. f. 747. — 

 SheU ly- 2 inches long, 10-12 lines deep, light and thin, plain 

 yellow-brown, without rays. Eiver at Mogador, and frequently 

 found dead on the beach, having been brought down by floods 

 into the sea. Except in being without coloured rays, it agrees 

 exactly with the Spanish shell above referred to from the Guadal- 

 quivir. It approaches IT. hatavus, Nilss. ; but besides several 

 other points of difference, less striking though important in their 

 aggregate, it has the anterior end longer or more produced pro- 

 portionally, and the beaks or umbones consequently less ex- 

 centric. 



32. This is the var. figured in F. H. t. 48. f. 1 ; Hani. Conch. 

 Linn. t. 2. f. 4 ; Phil. i. t. 5. f. 12, 13. 



43. Two varieties, viz., the Anomia Cepa and A. electrica of 

 Linnaeus. 



45. Patella rustica, L., Dillw. = P. lusitanica, Gm., Phil. i. 110. 

 =P. punctata, Lam. vi. 1. 333 ; Payr. Catal. 88, t. 3. f. 6, 7 = P. 



guttata, D'Orb. in W. B, Hist. Can. ii. 2. 98, t. vii. B. f. 13-15. 

 Martini's t. 5. f. 35, 36, well represents old worn sliells of this most 

 common and abundant Madeiran and Canarian Limpet. 



46. Patella pellucida, L., var. a. — Shell (being adult) more 

 depressed, with the vertex lower or nearer the margin, and also 

 somewhat stronger and larger, tlian in most Britisli specimens of 



