20 THE NAUTILUS. 



hindmost four large, the others smaller and rather faint; sides of 

 foot with a series of over ten round or oval orange spots ; branchiae- 

 very dark blue, speckled with orange within ; sole deep blue. 



The splendid blue pigment of this animal is dissolved out after 

 death, even in sea-water; but very fast in formalin, producing a blue 

 liquid which is turned pink by hydrochloric acid, but is not affected 

 by alkalies, except that strong alkalies rapidly bleach it. Curiously, 

 the orange spots of the animal seen through the blue solution, appear 

 red, though in reality their color is not altered. 



Hob In rocky pools between tides, San Pedro, Calif., July 28th, 

 and La Jolla, Cal., early in August, all collected by Wilmatte P.. 

 Cockerel!. The name of the species was suggested by the fact that 

 it carries the colors (blue and gold) of the University of California. 

 It was also collected at San Pedro by the naturalists of the Uni- 

 versity of California Marine Laboratory. 



CHROMODORIS PORTERS, n. sp. Length about 11 mm., form of 

 G. universitatis, but uniforrnily much smaller, and quite different in 

 markings. Deep ultramarine blue, including the whole of the foot ^ 

 mantle with two rather broad longitudinal stripes of bright orange, 

 not united posteriorly, and ending anteriorly at the rhinophores, but 

 anterior to the rhinophores is a transverse orange stripe ; median 

 stripe of C. mcfarldndi represented by an inconspicuous lighter blue 

 line ; margins of mantle very narrowly pure white ; foot wholly 

 without marks, except that the hind end has a suffused whitish 

 stripe. Rhinophores and branchiae entirely retractile. Branchial 

 plumes eleven, in a circle, simply pinnate, entirely of the blue color 

 of the mantle. After death, a number of conical white papillae 

 (about 9 on each side) appear beneath the hind part of mantle. 

 After death, the blue dissolves out, and the body becomes a sort of 

 pale greenish-blue, with the dorsal stripe very white ; and the orange 

 bands as in life. 



Hob. In rocky pools at low tide, La Jolla, Cal., early in August,, 

 rather common. (Wilmatte Porter Cockerell.) 



CHROMODORIS MCFARLANDI, n. sp. Length about 35 mm.; 

 mantle ample, covering head, but pointed end of foot projecting far 

 beyond mantle posteriorly ; rhinophores short and stout, lamellate,, 

 with over twenty transverse lamellae ; branchiae entirely retractile, 

 arranged in the shape of a horseshoe, not entirely surrounding the 

 anus, which is produced into a truncate cone : branchial plumes- 



