1^11] Kofoid: The Genus Gonyaulax. 225 



Reported by Jorgensen (1899) from Herlo fiord, by Cleve 

 (1900a) from Spitzbergen, by Paulsen (1904) as abundant in 

 fiords in Iceland, from Shetland and the Faeroes, and by Paulsen 

 (1907) as rare in the North Sea, Skagarak and Cattegat. It 

 is plainly a neritic northern species. It appears in the records 

 of the International Commission for the Investigation of the 

 Sea (see Ostenfeld, 1906, 1909), from the North Atlantic, North 

 and Baltic Seas, and the Gulfs of Bothnia and Finland as 

 present in small numbers. 



c). The Polygramma Group. 

 This group is represented in the plankton of the San Diego 

 region by five species, G. turhynei Murr. and Whitt., scrippsae 

 sp. nov., polygramma Stein, kofoidi Pavillard, and pacifica 

 Kofoid. which form a series of increasing size, characterized by 

 linear markings with a predominantly longitudinal direction. 

 In the order named the species represent stages in increase in 

 size, elongation of body and increase in antapical asymmetry. 

 Owing to the considerable variability in proportions and in sur- 

 face markings, a wide range of material and a large series of 

 carefully executed drawings are desirable for a critical compari- 

 son of the species in this group. Plate formula 3', 0", 6", 6, 6'", 

 IP, 1"" . 



6. Gonyaulax turbsmei Murray and Whitting 



PI. 17. fig. 44 

 Gonymilax Turhynei Murray and Whitting (1899), pp. 323-324, pi. 



28, figs. 4a, b. 

 G. polygramma Stein (1883), in part, pi. 4, fig. 19 only. 

 G. Turbinei, Schroder (1906), pp. 329, 340. 

 Glenodinium ovatum Faure-Fremiet (1908), p. 214-5, pi. 15, fig. 2. 



Provisionally referred here. 



Diagnosis : A small ovoid species, with equatorial girdle dis- 

 placed 1 to 1.5 girdle widths, without marked overhang, with 

 linear markings more or less well developed. 



Description: Body ovoid, length 1.16 transdiameters, girdle section 

 circular. Epitheca and hypotheca subequal. Epitheca a low cone with 

 somewhat convex sides, its altitude 0.6 transdiameter. No apical horn, 

 apical region elliptical, flattened, sloping ventrally. Hypotheca sub- 

 hemispherical with very slight ventral depression. 



Girdle equatorial, descending, displaced distally 1 to 1.5 girdle widths, 

 with very little if any overhang, deeply impressed, without lists or 

 prominent ridges. 



