458 MEMOIRS OF THE UNIVERSITY OF CALIFORNIA 



No pusules were noted. The plasma is a delicate dahlia purple, deepest peripherally and fading 

 a little from the anterior end posteriorly, as though revealing some biochemical axial gradient. 



One of the animals seen was enclosed in a roomy, transparent cyst proportioned in contour 

 to the body and filled with a fluid tinged with the color of the organism. Its length was 1.18 

 that of the body. 



DniExsioxs. — Length, S8i^ ; transdiameter, 52^ ; length of oeelhis, 35/^ ; axes 

 of nucleus, 35,"- and 17/^ ; length of cyst, 95^^. 



OccuEBEX'CE. — The individual figured was taken July 25, 1917, 11 miles off 

 La Jolla Avith a No. 25 silk net in a haul from 80 meters to the surface in a 

 surface temperature of 21-2 C. It occurred again on July 27 in a haul of 

 similar nature taken 4 miles off La Jolla in a surface temperature of 21-9 C. 



Activities. — The first individual studied was encysted when found. Under 

 the cover glass, however, it broke out of the cyst and moved quickly across tlie 

 slide in an almost straight line, with a rapid anticlockwise rotation. 



CoMPARisoxs. — This species belongs to the subgenus Pouclictia with diffuse 

 non-integrated ocellus. The lens, in fact, is scarcely organized as an efficient 

 optical organ, and the pigment is distinctly amoeboid and rather widely dis- 

 tributed. In this feature it is near P. scliuetti, but differs from it entirely in 

 proportions, color, and shape and structure of the lens. In color it is unique 

 in Pouchcfia, the dahlia purple being of a different tone and darker than the 

 rosy tints of P. scJiudti and P. nthescens. The axial gradation in color from 

 the anterior end posteriorly is not unlike that in Gynmodiniutn sulcatum, G. 

 nihricauda, and Gyrocliuiii))i ruhno)!, Imt the reverse of that in G. postmacu- 

 latum,, all species with more or less diffuse reddish to purplish coloration of the 

 plasma (pi. 8, figs. 83, 88, 86, 91). 



Pouchetia purpurescens sp. nov. 



Plate 8, figure 8-4 ; text figure 00, 7 



Diagnosis. — Small species with body asymmetrically ellipsoidal, deeply con- 

 stricted by furrows; length 1.7 transdiameters : girdle forms a descending left 

 spiral of 2 turns, displaced over 0.75 total length; sulcus with short apical loops 

 and torsion of 1 tiu-n ; ocellus concentrated, posterior, horizontal, small, appar- 

 ently at the right of the sulcus ; lens spheroidal, melanosome hemispherical, with 

 red central core; plasma amaranth purple. Length, 59m. Pacific off La Jolla, 

 California, June, July. 



DESCRffTiON. — The body is ellipsoidal, asymmetrical at either end, with the posterior portion 

 of the epicoue covering the ocellus and forming a projecting lobe. The body is deeply constricted 

 and rendered asymmetrical by the spiral sulcus. The epieone and hypocone are nearly equal. 

 The epieone is small at its anterior end vd\\\ a length of 0.06 of the total length of the body at 

 the proximal end of the girdle. From this point it sweeps around the body posteriorly in a 

 broad band about 0.55 transdiameter in width, which terminates at a distance from the antapex 

 of 0.1 of the total body length. The apex is broadly rounded. The hypocone follows the epieone 

 in its course around the body with a .slightly broader band which terminates iu a button-shaped 



