374 MEMOIRS OF THE UNIVERSITY OF CALIFORNIA 



Cochlodinium pellucidum Lolimann 



Text figure GG, 15 



Cochlodinium pellucidum Lohmann (1908), p. 264, pi. 17, fig. 21. 

 C. pellucidunu Paulsen (1908:i, pp. 104, 105, fig. 145. 

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

 C. pellucidum. Lebour (1917b), p. 197. 



DiAGxosis. — A small species with sligiitly obovoidal body, its length 1.77 

 transdiameter; girdle a descending left spiral of 1.5 turns, displaced 1.09 trans- 

 diameters ; sulcus ( ?) ; colorless. Length, 39h. Baltic near Kiel, Germany, 

 June. 



Descriptiox. — The body is elongate obovoidal with broad apices, widest near the middle, its 

 length 1.77 transdiameters at the widest part. The ejjicone and hypoeone are subequal. In 

 Lohmann "s figure the sulcus is omitted entirely, and the girdle drawn as a spiral of 1.5 turns. 

 It is difficult to determine the ends of the girdle, as both the proximal and distal portions of the 

 furrow may be parts of the sulcus. In our description we have taken the length of the girdle 

 as 1.5 turns. This would give to the epicoue a length from the proximal and distal ends of the 

 girdle of 0.12 and 0.79 respectively of the total length of the body. The hypoeone is slightly 

 narrower than the epicone and is less s^nnmetrical. 



The girdle is a descending left spiral of 1.5 turns, its proximal and distal ends distant from 

 the apex about 0.12 and 0.79 respectively of the total length of the body. The furrow is narrow 

 and deeply impressed. 



The cytoplasm contains numerous minute spherules scattered through the peripheral zone. 

 In the posteroeentral part is a small spheroidal body. Anterior to this is a somewhat irregular 

 ellipsoid, yellow ochre in color, which is probably a food body. In the anterocentral part is 

 another body, dark, slightly smaller than the food mass and ellipsoidal in shape. This is 

 probably the nucleus, though no clue to its identity is given. The organism is colorless. 



DiMExsioxs. — Length, 39^*; transdiameter, 22/^. 



OccTTRRExCE. — Figured by Lohmann (1908) from the Baltic Sea near Kiel, 

 Germany, in Jime. 



CoMPAHisoxs. — With the sulcus omitted the description of this species is 

 somewhat inadequate. It is, however, tentatively placed in the C. strangidatum 

 group of the subgenus Coclilodininm. 



Cochlodinium pirum (Schiitt) Lemm. 

 Plate 9, figure 101 ; text figure GG, 3 



Gymnodinium pirum Schiitt (1895), p. 166, pi. 23, fig. 76i_4. 

 Cochlodinium pirum, Lenunermann (1899), p. 360. 

 Gymnodinium pirum. Entz (1907^, p. 11. 

 G. dirum, Entz (1909), p. 246, lapsus. 



DiAGXosis. — Medium sized species; body obovoidal: wider posteriorly; 

 length, 1.6-1.7 transdiameters, girdle a descending left spiral of 1.5 turns, dis- 

 placed 0.5-0.6 total length ; sulcus with torsion of 0.5 turn ; surface striate ( 1) ; 

 color, yellow ochre. Atlantic ; Pacific off La Jolla, California, July. 



