KOFOID AND SWEZY: UNARMORED DINOPLAGELLATA 463 



2. Seluitt's (1895) Pouchctia rosea (Pouchet) is a complex of forms none 

 of which is Pouchet 's species, P. rosea. One of these (Schiitt's, pi. 26, figs. 

 923-12) has the diifuse or compound type of ocellus with divided lens and branch- 

 ing, amoeboid pigment mass. To this we assign the new name Pouchetia 

 schuetti. The other and smaller form (Schiitt's, pi. 26, figs. 92i-2) with a 

 length of 70-59m as compared with 87/^ in the first group has a concentrated 

 or sini])le lens and a solid melanosome. This appears to be a mutilated or con- 

 tracted individual, possibly moribund. The possibility of a distinct species is 

 not precluded. We leave it as indeterminable, but probably not P. schuetti 

 sp. nov. 



The synom^ny of the citations of Ponclietia rosea (Pouchet) Schiitt re- 

 corded by workers subsequent to Schiitt (1895) is a matter which cannot be 

 determined beyond the point of noting their inclusive nature, since none of 

 them has critically compared his material with the figures of Pouchet and 

 Schiitt, though Pavillard (1905), Paulsen (1908), and Ostenfeld (1913) have 

 all noted the perplexing status of P. rosea (Pouchet) Schiitt. 



Lohmann (1908) describes as Gyninodinium roseum a new species which 

 Paulsen (1908) later renames G. loJimamii because of the preoccupation of the 

 name roseum by Dogiel's (1906) G. roseum. Both Lohmann 's and Dogiel's 

 names are, however, excluded from Gymnodimnm because of Pouchet's Gjjm- 

 nodinium polypliouHS var. roseum (1887). Dogiel's G. roseum, is utilized by 

 Chatton (1912) as the type species of a new genus Cliytriodiniiim. 



Pouchetia rubescens sp. nov. 



Plate 8, figure 90 ; text figure 00, 5 



Diagnosis. — Medium sized species, obovoidal, length 1.4 transdiameters ; 

 girdle a descending left spiral of 1.2 turns, displaced 0.5 transdiameter ; sulcus 

 with apical loop nu;cli displaced ventrally, antapical section short; torsion 1.2 

 turns; ocellus concentrated, posterior; lens hemispherical; pigment mass 

 hemispheroidal, dark brown; color, pink. Length, 73/^. Pacific off La Jolla, 

 California, July. 



Description. — The body is sliglitly obovoidal, with its widest transdiameter 0.112 of the total 

 length from the anterior end. The epicone is 0.3 longer than the hypocone, with hemispherical 

 apical contour notched at the ventral side of the apex by the sulcus. Its length above the 

 anterior flagellar pore is 0.4 and from its posterior extremity is 0.9 of the total length of the 

 body. The hypocone is contracted somewhat, bulging ventrally between the furrows, somewhat 

 flattened ventrally towards the antapex and slightly grooved by the distal end of the sulcus. 

 Its length from its anterior termination to the anta]iex is 0.5 and from the distal junction of the 

 girdle and sulcus 0.07 of the total length of the body. The antajjex is rounded without sulcal 

 notch. 



The girdle meets the sulcus at a point 0.46 of the total length of the body from the apex, 

 passes thence around the body 0.3 of a turn before sweeping posteriorly in a deseeudiug left 

 spiral, steei)ening to 35° from the longitudinal to join the sulcus at a point 0.09 of the total 



