314 MEMOIRS OF THE UNIVERSITY OF CALIFORNIA 



Gyrcdinium lachryma (Meuuier) 



Text figure EE. 6 

 Spiroclimum Incln-yma ileiinier (1910), p. 63, pi. 14, figs. 21, 22. 



DiAUXOSis. — A medhuii sized species with ovoidal body, its length 2.83 trans- 

 diameters; girdle a descending left spiral, displaced 1.4 trausdiameters ; snlens 

 extending from the anterior end of girdle to antapex. Length, 105/^. Kara Sea 

 off Xova Zembla, Jnly. 



Description. — The body is ovoidal, broadly rounded posteriorly and gradually tapering to a 

 slender point anteriorly, its length 2.83 trausdiameters at the widest part. The epicone exceeds 

 the hypoeone in length by 0.42, but its narrower width makes their relative proportions nearly 

 equal. It is slender conical anteriorly (25°) with a narrow, pointed apex and expanding to 

 about 66° ii) the region of the girdle. It has a length on the left and right sides of 0.45 and 0.90 

 respectively of the total length. The hypoeone is subhemispherical posteriorh- with a broad, 

 rounded antapex. 



The girdle meets the proximal end of the sulcus at a distance from the apex of 0.45 of the 

 total length of the body. It follows a steeply descending left spiral course around the body and 

 meets the distal end of the sulcus about 0.9 of the total length of the body from the apex, being 

 displaced posteriorly 1.4 transdiameters. The furrow is not well marked out in Meunier's (1910) 

 figures, but its width seems to be about 0.19 transdiameter and it is rather shallow. The flagella 

 are also omitted from his figures. The sulcus begins at the proximal end of the girdle and 

 extends posteriorly to near the antapex. 



The nucleus is large, ellipsoidal and is found in the center of the body with its major axis 

 parallel to the long axis of the body. Its major and minor axes are about 0.9 and 0.4 trans- 

 diameter in length respectively. It is filled with loose chromatin strands following its longer 

 axis. The peripheral zone of ej'toplasm is tilled with small, closely crowded rodlets arranged 

 radially in longitudinal rows. Color? 



DiMENSioxs. — Length, 105m ; transdiameter, 37/^ ; axes of nneleiis, 34m and 14m. 



OccTJRREXCE. — Figiu'ed as a rare species by Meunier (1910) from the collec- 

 tions of the Dnke of Orleans's Arctic Expedition of 1907 from the Kara Sea 

 off Xova Zembla, Jnly 30, in a hanl from a depth of 127 meters. 



Comparisons. — This species is close to G. contortum (Schiitt) (fig. CC, 22), 

 Imt differs from it in its more tapering epicone, more rotimd hypoeone, less 

 torsion, and wider intercingnlar area. 



Gyrcdinium longum (Lohmann) 



Text figure DD, 10 



Cochlodinium longum Lohmann (1908), p. 264, pi. 17, fig. 22. 

 C. longum. Paulsen (1908), p. 104, fig. 144. 

 C. longum, Ostenfeld (1913), p. 338. 



DiAGXOSis. — A rather small species with slender snbfnsiform body, its length 

 2.69 transdiameters; girdle a descending left spiral, displaced 1.06 transdiam- 

 eters; surface striate; color, light yellow. Length, 70m. Baltic Sea off Kiel, 

 Germany, June. 



