444 MEMOIRS OF THE UNIVERSITY OF CALIFORNIA 



C'oMPAEisoxs. — This species is unique in Pouclietia and in the whole family 

 Poiif'hetiidae in the structure of the ocellus. In shape of hody it is near Ncmuf- 

 odiniiun torpedo. The straight course of the sulcus on epicone and hypocone 

 above and below the girdle is scarcely equaled elsewhere in Pouclietia. It is 

 thus one of the most divergent sjaecies in that genus, although it becomes the 

 tAq:»e species of the genus (by specification) and is the only one cited by Schiitt 

 (18.96) when he characterized Pouclietia. Because of the compomid lens we 

 place it in the subgenus Pouclietia. 



Pouchetia juno Schiitt 



Text figure 00, 3 



Pouchetia juno Schiitt (1895), pp. 6, 87, 97, 170, pi. 27, figs. 98i.„ 99^_.,. 

 P. juno, Lemmermann (1899), p. 360. 

 P. juno, Lang (1901), p. 161, fig. 175&. 



P. nigra, Pavillard (1905), in part, p. 47, as a synonym (?) of P. nigra (Pouchet) Lem- 

 mermann {=^ Protopsis nigra (Pouchet) Kofoid and Swezy). 

 P. juno, Liihe (1913), p. 320, fig. 322 B. 



DiAGxosis. — A large species, body stout fusiform, constricted, its length 2 

 transdiameters ; girdle a descending left spiral of 1.5 turns; sulcus with torsion 

 of 2.5 turns, with apical loop of 1.25 turns ; ocellus concentrated, median, hori- 

 zontal ; lens spheroidal ; melanosome massive. Length, 141m. Atlantic, Pacific 

 off La Jolla, California, July. 



Description. — The body is stout fusiform, its length 2-2.3 transdiameters measured at the 

 widest point which is about equatorial, deeply constricted by the sulcus, and concave in outline 

 in the central section when fully elongated (Schiitt, 1895, pi. 27, fig. 99„). The epicone is 0.4 

 of its own lengtli longer than the hypocone. Its length at the proximal and distal ends of the 

 girdle is 0.30-0.43 and about 0.84 respectively of the total length of the body. It is rounded 

 subconieal at an angle of about 40°-50°, and the apex is flat or rounded and evidently much 

 modified by the terminal sulcus. The hypocone has a length at the two ends of the girdle of 

 0.57-0.70 and 0.11 respectively of the total length of the body, and is more broadly subconieal 

 (55°) with a truncate antapex notched by the distal end of the sulcus. 



The girdle forms a uniformlj' descending left spiral, 20°-25° from the horizontal. It joins 

 the sulcus anteriorly at 0.30-0.43 total length from the anterior end and reunites with it distally 

 at about 0.11 of the total length from the postmargin, on the opposite side of the body from its 

 origin. It thus makes 1.5 turns and is displaced about 0.45-0.60 total length. The furrow is 

 0.1 tran.sdiameter in width and is very deeply sunken into the plasma, with prominent over- 

 hanging anterior lip. 



The sulcus runs from apex to antapex and has a total torsion of about 2.5 turns. Schiitt 's 

 two figures are irreconcilable as to the course of this structure. His first figure (1895, pi. 27, 

 fig. 98i) more correctly portrays the course and in our text figure (fig. 00, 3) we have repro- 

 duced his second figure modified to bring out the correct interpretation, especially with reference 

 to the posterior end of the sulcus. The long channel ( ?) seen in the posterior part from which the 

 posterior flagellum seems to emerge may really have been the posterior pusule opening posteriorly 

 at the posterior flagellar pore and not the sulcus seen through the body from above. We so 

 interpret it in our modified figure. The sulcus has an apical loop of 1-1.5 turns which may 

 surround a small apical eminence. The intercingular section makes about 1.2 turns crossing 



