KOFOID AND SWEZY: UNARMORED DINOFLAGELLATA 467 



nnnied, of the figures both of Pouehet (1887, = P. rosea (Pouehet) and of Schlitt 

 (1895) only a part of P. rosea as reported by Lemnierniann (1899), Pavillard 

 (1905), and Paulsen (1907, 1908). P. rosea Dogiel (1906) is Chytriodinium 

 roseum (Dogiel) Chatton (1912) and P. rosea Lohmann (1908) is P. lomanni 

 Paulsen (1908). P. rosea of Schroder's (1900) reference is exclusively P. 

 scliuetti. 



Pouchetia striata sp. nov. 



Tfxt figure 00, 8 



Diagnosis. — Body rotund, length 1.2 transdianieters ; girdle a descending 

 left spiral of 1.2 turns, displaced 0.48 transdiameter ; sulcus with anterior and 

 posterior loops and a torsion of 1 turn; ocellus concentrated, posterior; lens 

 ellipsoidal ; melanosome hemispherical, black with red coi-e, color rose red ; sur- 

 face coarsely striate. Length, 75/^. Pacific off La Jolla, California, August. 



Description. — The* body has a robust habit, its length exceeding its transdiameter by only 

 0.2. The epicene exceeds the hypoeone in length by 0.25. The epieone is broad, contracting 

 below the equator, with subhemispherieal apex, with a length on the left of the sulcus of 0.46 

 and on the right of 0.8 of the total length of the body. The hypoeone is more contracted than 

 the epieone, obliquely flattened on the left side where the distal end of the sulcus makes a broad 

 trough which extends down to the subhemispherieal antapex. 



The anterior junction of the girdle and sulcus occurs at 0.46 of the total length of the bodj^ 

 from the apex. The girdle follows a descending left spiral course around the body and meets 

 the sulcus distally at about 0.8 of the total length of tlie body from the apex. The furrow is 

 0.08 transdiameter in width and is deeply impressed with smooth, overhanging borders. The 

 anterior flagellar pore is located at the anterior junction of the girdle and sulcus and the posterior 

 pore slightly below the posterior junction. 



The sulcus extends anteriorly around the epieone in a wide loop which terminates at the 

 apex, making 0.5 turn above its anterior junction with the girdle. Below this it passes poster- 

 iorly at an angle of about 40° from the horizontal to meet the girdle distally, below which it 

 turns abruptly posterior to the antapex. It forms a wide, shallow trough with smooth borders. 

 Below the posterior junction of girdle and sulcus it broadens, resulting in an oblique flattening 

 of the left side of the antapex. There is no antapical loop. 



The ocellus is 0.45 transdiameter in length, posteroventrally located at the left of the distal 

 end of the intercingular sulcus. It is directed anterosinistrally at an angle of aliout 20° from 

 the vertical. The clear hyaline lens is ellipsoidal, about 0.35 transdiameter in Itiigth and 0.22 

 in diameter and has three concentric laminae. The posterior i)ortion is imbedded in the melano- 

 some, which is black, hemispherical, with undulating eonfour, and has a red central core. 



The nucleus is large, spheroidal, and located in the anterosinistral region. Its axes are 0.56 

 and 0.52 transdiameter in length respectively. 



The cytoplasm is very clear and transparent. Centrally located near the ocellus was a 

 rounded food mass and several refractive, colorless oil globules. Tlie cytoplasm in the interior 

 of the body is colorless with the characteristic rose-red color of the organism concentrated in the 

 peripheral layer. The surface of the body is striate with a few equidistant, longitudinal, lihiish 

 green lines, five or six across one face. These are found on both liyj)Ocone anil ei)ienne, but fade 

 out near the apices and girdle. 



