80 PROCEEDINGS OF THE ACADEMY OP [1879. 



Pliidiana iodinea, Cooper, Bergh, Beitr. zur Kenntn. d. Aeolidiaden, 

 i., 1. c. xxiii. p. 015,' 1873. 



Color corporis e violaceo purpureus, rhinophoria aurantiaca, 

 papillae aurantiace-rubra (Cooper). 



Dentes mediani siout laterales, multidenticulati. 



Eab. Ocean, pacific, orient. (San Diego, Cal. to Pnget Sound.) 



A single specimen was collected by Capt. Hall alive, on alga?, 

 at low water in Puget Sound, Washington Territory, Aug. 1813. 

 According to Cooper (1. c. p. 205) the species is found " among 

 alga?, outside of San Diego Bay, rarely inside." According to 

 Cooper's description and a drawing kindly lent by Dall, the color 

 of the living animal is violet purple, the rhinophoria orange 

 colored, the papillae orange-red. 



The length of the individual (most badly) conserved in spirits 

 was about 15.0 mm., with a breadth of the body of 2.0, and a height 

 of 2.5 mm.; the length of the papilla? reaching to about 4.0 mm.; 

 the length of the tentacula about 1.5 of the rhinophoria, about 2.3 

 mm. The color rather dirty chocolate. 



The ybr?n is elongated, rather compressed, the tail rather short. 

 The head rather small, the tentacula elongate, also the apparently 

 closely perforated rhinophoria. The back rather narrow; the 

 groups of papilla? situated on the side parts of it, firmly affixed 

 on the edge of foot-stalks, whose form and number could not be 

 determined, owing to the state of the specimen ; their number 

 seemed to be much greater than referred to by Cooper. The foot 

 rather narrow, the angles of the foremost margin much produced, 

 longer than the tentacula, strong; the groove in the anterior mar- 

 gin continued along the angles. 



The eyes are rather large, with black pigment. 



The jaws more rounded at the posterior end than in the Fl. affinis 

 (1. c. PI. XV. f. 13), otherwise as in that species; the cutting edge 

 witli several rows of small rounded denticles (fig. 15). The state 



Head obtuse, with four tentacles, the upper longer and turned upwards, the 

 lower deflexed. Two club-shaped, orange-colored appendages a little be- 

 hind the upper tentacles. Branchiae short, in a double row, close together 

 near the median line, their color orange-red. Length two and a half inches, 

 breadth one-fifth of an inch." Cooper, 1. c. 



' The "descriptions" of Cooper are of the kind which have caused so 

 much confusion in science, so light and trifling that there properly should 

 no notice at all be taken of them. 



