1911] Kofoid: The Genus Gonyaulax. 249 



Comparisons: Distinguished from G. alaskcnsis by its more 

 elongated body, more linear markings and absence of antapical 

 spines. From G. hyalina it differs in its less rotundity and less 

 pronounced linear markings. In this species the length and 

 transdiameter are about equal. From G. inflata it differs in its 

 less expanded girdle region, less sloping hypotheca and smaller 

 size. 



Synonomy: Originally described by Schiitt (1895) in his 

 new genus Stciniclla, but in all skeletal characters a typical 

 Gonyaulax. 



Distribution : Taken sparingly in the plankton of the inner 

 harbor, at San Pedro, Calif. (No. 505), May 31, 1901; evidently 

 carried in by tidal currents with the oceanic plankton from the 

 outside. 



Reported by Ostenfeld (1900) as very rare in Gulf Stream 

 waters north of Scotland 59° N, 2°-9° W, and by Cleve (1901a) 

 from the Atlantic 29°-47= N and 9°-23° W. Also by Schroder 

 (1900) from Naples and by Entz (1902) from Quarnero on the 

 Adriatic. 



14. Gonyaulax alaskensis sp. nov. 



PI. 17, figs. 45, 46; pi. 14, fig. 32. 



Diagnosis: A very large polyhedral species with much dis- 

 placed (4 girdle widths) girdle, apex dorsally extended, coarse 

 reticulations often of predominantly longitudinal elements with 

 scattered pores at the nodes. Longitudinal furrow flaring widely 

 at antapex ; two short antapical spines. The ventral area reaches 

 nearly half the distance from girdle towards apex. 



Description : Body polyhedral with rounded angles, its length 1.05- 

 1.12 transdiameters, nearly circular in equatorial cross-section with some 

 flattening on ventral face of hypotheca. Epitheca apj^roximately equal 

 to hypotheca, low, conical, its greatest altitude 0.66 transdiameter, 

 slightly angled at the apical-i)recingular sutures. No apical horn, apex 

 small, elongated, extending dorsally beyond the summit, less than a girdle 

 width across and 2.5 in length, sloping obliquely toward the ventral face. 

 Hypotheca subhemispherical, its altitude 0.6 transdiameter with convex 

 sides swelling at the girdle, contracted to a proportionally small antapex 

 less than 0.3 transdiameter across, bearing two small, stout, widely sep- 

 arated spines. 



The girdle is equatorial, descending with little (0.5 to 1.5 girdle 

 widths) overhang, but relatively great displacement (4 girdle widths). 



