518 PROCEEDINGS OF THE ACADEMY OF [1899. 



the mantle edge, in some cases leaving behind it a complete ring 

 of mantle more than a quarter of an inch Avide, while the central 

 part crawls away, appai-ently none the worse for the loss. The 

 animal can hardly be described as " brittle," for it is gelatinous 

 to the touch and secretes an abundant mucus. The process of 

 amputation is not rapid, and would not protect the Dlscodoris 

 against a fish or any quick-moving animal, but might perhaps 

 enable it to escape the attacks of a carnivorous mollusk. I did not 

 succeed in discovering what its enemy may be. 



Chromodoris scurra Bergh. 



This brilliantly colored species is common on the coasts of all the 

 Samoan islands, and, though rarely an inch long, is conspicuous 

 owing to its ornamentation, which must be warning. The back 

 is striped with lines of white, violet and bright orange. The 

 large rhinophores and the branchial rosette are violet at the tips 

 and orange in the lower j^arts. Bergh's Plate xxxiii (in Semper's 

 Reisen, II, 2) hardly does justice to the vivid coloration of the 

 living animal. 



Chromodoris inomata Pse. 



Common on Apia reef. I do not know why Pease distinguished 

 this beautiful animal by so inappropriate an epithet as " un- 

 adorned." The back and foot are white, subpellucid and spotted 

 with purple. The mantle, but not the foot, which projects con- 

 siderably behind, is bordered mi\\ a line of bright orange. The 

 sevenfold branchial star is grayish yellow, and the upper part of 

 the large rhinophores bright orange. The labial tentacles, which 

 are of moderate size, are faintly tinged with the same color. The 

 foot is long and narrow, and the length of the whole animal rather 

 more than an inch. 



Chromodoris sp. 



Very dark green, edge of mantle bluish, shape very variable. 

 Mantle edge indented or not at will of animal. Rliinophores 

 dark green, tipped with white. Branchial rosette dark green, 

 rather large. Labial tentacles very small. Foot light gray. 

 Viscera visible from under surface. Tail much longer than mantle. 

 One specimen at Manono. 



