PATELLA. 85 



The other figures are drawn from specimens before me. Dr. H. 

 Simroth (Ziir Ivenntniss der Azorenfauna, in Archiv fiir Naturge- 

 schichte 54th year, 1888, p. 215, Apr., 1889) ranks the Azores 

 Patella under the single species aspera, with several varieties as 

 follows : 



"Patella aspera Lam. 



a. typical form,^=^P. lower Orl)., P. baudoni Drouet, P. speeta- 

 bills Drouet, not Dkr. 



b. P. moreleti Drt., P. crenata Gm. of Orb., in Moll. Canar., 

 and probably P. gomezi Drt. 



c. var.sini7-othiy. Martens. Narrower, oval, flat. Ribs weaker, 

 more rounded than carinated, either entirely smooth or hav- 

 ing distinct scales. Margin but little crenated. Color of the 

 outside pretty regular dark reddish-brown ; inside also pretty 

 dark, obscure violet, sometimes more reddish, sometimes 

 more dark blue, the central area bluish-white or gray-blue, 

 sometimes with an admixture of yellow ; rarely having dis- 

 tinct dark rays inside. The margin is often somewhat 

 horizontally dilated. Apex at the front I. Length 41, 

 breadth 30, alt. 14 mill. ; length 32, breadth 24, alt. JO mill. 

 Azores. Approaches I', ecerulea L. but evidently deserves a 

 separate name. 



d. var. accedens ad lusitanicam Gmel. Higher, broader 

 more bluntly elevated, ribs and border similar to the fore- 

 going. Colored outside and inside with broad dark, defined 

 rays on a light ground. Central area lead-gray, rarely 

 yellowish or reddish. Only small specimens, length 25 

 breadth 21, alt. 11 mill., apex at f of the length. The P. 

 nigrosquamata Dkr. of Drouet is perhaps this, but without 

 rays." 



P. MORELETI Drouet. PI. 56, figs. 27, 28. 



Shell subdepressed, very rugose, ribbed, the ribs scaly, scarcely 

 solid ; brownish-green outside : inside brownish or reddish, iridescent, 

 with a white spot at the summit. Apex acute. Aj^erture ovate, 

 crenulated. Length 40, breadth 30, alt. 12 mill. {Drouet.) 



Fayal, Azores. 



P. moreleti Dr., Moll. Mar. A9ores, p. 42, t. 2, f 10, 11, 1858. 



Considered a variety of P. aspera by Simroth. 



