Vol. IX] BERRY— NOTES ON WEST AMERICAN CHITONS 5 



power (x36), these interspaces are conspicuously spongy, 

 while in gothicus they are not; 



(4) the heavier granulation of the lateral areas. 

 The two species are of about the same size, and both are 

 brilliantly colored. As a further aid in separating them, I 

 append the accompanying rather rough sketches (text figs. 

 1-4). No doubt the receipt of good alcoholic material of 

 gothicus will reveal additional important features of taxo- 

 nomic value in the girdle. Gothicus is so far recorded only 

 from the immediate vicinity of the San Pedro Channel, tham- 

 noporus from Monterey Bay. In the original description of 

 the latter species, a lapsus calami resulted in the spelling 

 tliamnopora. The correction to thamnoporiis is made in ac- 

 cordance with Article 19 of the International Code. 



Literature Cited. 

 Berry, S. S. 



:11. A new Calif ornian chiton. < Proceedings Academy 

 Natural Sciences Philadelphia 1911, pp. 487-492, text fig. 1-7, 

 pi. 40, October, 1911. 

 Carpenter, P. P. 



'55. Descriptions of (supposed) new species and varieties 

 of shells, from the Californian and West Mexican coasts, 

 principally in the collection of H. Cuming, Esq. < Proceed- 

 ings Zoological Society London 1855, pp. 228-235, 1855. 



'64. Supplementary report on the present state of our 

 knowledge with regard to the Mollusca of the West Coast of 

 North America. < Report British Association Advancement 

 Science 1863, pp. 517-686, August, 1864. 



'66. Descriptions of new marine shells from the coast of 

 California. Part III. < Proceedings California Academy 

 Natural Sciences, v. 3, pp. 207-224, Februarv, 1866. 

 Pilsbry, H. A. 



'92. Monograph of the Polyplacophora. (Lepidopleu- 

 ridae, Ischnochitonidse, Chitonidse, Mopaliidae). Manual of 

 Conchology, v. 14, pp. i-xxxiv, 1-350, pi. 1-68, Philadelphia, 

 1892. 

 Thiele, J. 



:10. Revision des Systems der Chitonen. II. Teil. 

 <Zoologica, Bd. 22, pp. 71-132, pi. 7-10, Stuttgart, 1910. 



