1911] Kofoid: The Genus Goinjaulax. 215 



G. spiitifcra, Entz (1907), pp. 11-19, pi. 2, figs. 5-6; (1909), pp. 247- 



256, pi. 8, figs. 5-6. 

 G. spinifera, Paulsen (1907), pp. 7-8, fig. 6; (1908), pp. 28-29, 



fig. 37. 

 G. Gran a, Henekel (1909), p. 118, pi. .30, figs. 1-16. 



Diagnosis : Larger than G. spinifera, less rotund, with less 

 overhang. Epitheca subconical, shoulders often slightly angled, 

 generally two stout antapical spines. Line joining ends of girdle 

 makes an angle of 13°-18° with major axis; longitudinal furrow 

 not abruptly widened opposite distal end of girdle \ surface usu- 

 ally heavily reticulated. 



Description: Based largely on material from the Faeroes. Body sub- 

 rotund, sometimes subangular at preeingular suture, with short, stout 

 apical horn one to two girdle widths in length and 1 to 1.5 widths at apex, 

 rising from slightly angled shoulders of the subconical ejjitheca; its 

 length 1.1-1.17 (in Stein's figure 12, 1.5) transdiameters. Little if any 

 convexity in sides of epitheca, except at approaching fission(?), its 

 greatest altitude 1.45 transdiameters. Altitude of the hypotheca 0.55 

 transdiameter. The latter more rotund than epitheca, contracted to a 

 broad antapex somewhat less than 0.5 transdiameter across. 



Girdle equatorial, descending, displaced 2 to 2.5, with an overhang of 

 1 to 1.25 girdle widths. Furrow deeply impressed with stout marginal 

 ridges bearing a low ribbed fin. Longitudinal furrow slightly sigmoid, 

 laterally compressed nearly to closure between girdle ends, oblique to the 

 major axis in this region 13°-18°, rarely 26°, expanding posteriorly. This 

 expansion is more apparent than real for the left side of the middle part 

 of the furrow is encroached upon by the thickened reticulate fin (/'., 

 pi. 9, fig. 5) arising from the median margin of the posterior intercalary 

 plate IP), which simulates the thecal wall in its structure and gives the 

 longitudinal furrow of heavily reticulated thecae an appearance of con- 

 striction anteriorly or expansion posteriorly which is not found in less 

 heavily reticulated individuals such as those from Southern Alaska waters 

 (pi. 9, fig. 4). The ventral area slightly indents the epitheca in a small 

 angular area. The longitudinal furrow of this species lacks the markedly 

 abrupt expansion immediately opposite the distal end of the girdle which 

 characterizes G. spinifera. 



The plate formula is 3', 0", 6", 6, 6'", IP, 1"". Apical 1' (pi. 9, fig. 5) 

 is very slender with a slight median expansion to the left and bears a 

 large closing platelet at its apex. Apical 3' bears the ventral pore {v. po.) 

 on its median margin toward the base of the apical horn. Preeingular 6" 

 is almost triangular. Postcingular 1'" is very narrow and is curved over 

 into the longitudinal furrow. The antapical 1"" is large, and is barely 

 indented by the ventral area. The plates of the ventral area (pi. 9, 

 fig. 5) are an anterior plate {ant. pi.) crossed by the anterior girdle 

 ridge, a large posterior one (post, pi.) reacliing to the level of the pos- 



