ACMJEA. 43 



ribs and intervening spaces. Summit eroded, dark brown. ( Gld.*) 



Length 20, alt. 6 mill. 



Barbados to Rio Janeiro, Brazil. 



f Acmcea subrugosa ORB., Voy. Amer. Merid., p. 479. 1847. Lottia 

 onychina GLD., U. S. Expl. Exped., p. 355, atlas, f. 461. Collisella 

 subrugosa DALL, Amer. Journ. Conch. vi, p. 255, t. 14, f. 14 (denti- 

 tion). Patella (Tectura?) Mulleri DKR., Jahrb. D. M. Ges. ii, p. 

 246, 1875. 



The specimens before me are much eroded. I have no doubt that 

 P. mulleri Dkr. is synonymous, but give the original description 

 here for comparison. A. subrugosa Orb. is also in all probability 

 the same, but the description is wholly insufficient for identification, 

 and should not be allowed to displace Gould's excellent diagnosis 

 and good figures. 



P. mulleri. Shell solid, ovate or elliptical, often irregular, more 

 or less convex, seldom conic ; with weak ribs and fine strise, which 

 also cover the ribs, but are seen only on fresh, un corroded specimens. 

 The obtuse apex lies at about two-fifths the shell's length. From it 

 unequal dark brown streaks radiate, which often split, and which 

 show through on the shining inside, and are especially distinct on 

 the border. The center is whitish or liver-brown; margin acute, 

 simple or subcrenulated. Length 22-24, alt. 10 mill. 



Bay of Maldonado, and Destero, Province of Sta. Catharina, 

 Brazil, abundant. 



Undetermined West Indian species. 



Patella (Acmcea f) antillarum Philippi (as of Sowb.) PI. 5, figs. 8, 

 9, 10. 



This is a dark colored, very finely striated, depressed shell. I 

 have seen nothing like it from the West Indies. Philippi gives 

 Antilles as the habitat. There is no resemblance between this and 

 antillarum Sowb. Compare Scurria parastica Orb. 



(See Phil, Abbild., etc. iii, Patella, t. 2, f. 12.) 



*** 

 V. JAPANESE SPECIES. 



The species of Japan are allied 'to those of Western North 

 America. Specimens of all of them have been examined by the 

 writer. 



