REPORT ON THE RADIOLARIA. 965 



Genus 412. Stephaniscus, 1 n. gen. 



Definition. S emantida with four typical basal feet (two sagittal and two 

 lateral or pectoral feet). 



The genus Stephaniscus differs from the preceding Cortiniscus in the production of 

 a fourth (sternal) foot, and therefore exhibits the same relation to it that Stephanium 

 among the Stephanida bears to Cortina. It differs from Stephanium in the pro- 

 duction of a basal ring, with pores or gates between the bases of the basal feet. Two 

 of these feet are sagittal (the posterior caudal and the anterior sternal foot), whilst the 

 other two are lateral or pectoral (right and left). The basal lattice-plate exhibits 

 either two pores (" jugular gates ") or four pores (two anterior jugular and two posterior 

 cardinal gates). 



1. Stephaniscus tetrapodius, n. sp. 



Sagittal ring nearly circular, smooth, with a short conical apical horn. Basal ring square, 

 smooth, with two triangular gates. Four feet simple, equal, conical, divergent, about as long as the 

 diameter of the ring. 



Dimensions. Height of the sagittal ring - 08, breadth 0'07. 



Habitat. Central Pacific, Stations 270 to 274, depth 2350 to 2925 fathoms. 



2. Stephaniscus quadrifurcus, n. sp. (PI. 92, fig. 14). 



Sagittal ring subcircular, thorny, with a small thorny apical horn. Basal ring also nearly 

 circular, with two large semicircular gates and a few small thorns. All four feet curved and forked, 

 the fork-branches again ramified, with numerous short curved and pointed branches. The two 

 lateral feet (right and left) are larger and more branched than the two sagittal feet (sternal and 

 caudal foot). 



Dimensions. Height of the sagittal ring 0'12, breadth O'l. 



Habitat. Central Pacific, Station 266,. depth 2750 fathoms. 



3. Stephaniscus quadrigatus, n. sp. (PI. 92, fig. 15). 



Sagittal ring oblique, ovate, with three prominent thorny edges ; its dorsal rod nearly straight 

 and vertical, the ventral rod strongly curved ; apex with a small curved horn. Basal ring with a few 

 short thorns and four gates of different size ; the two anterior (jugular pores) ovate or nearly 

 triangular, two-thirds as broad as the two posterior subcircular or pentagonal (cardinal pores). All 



1 Stephaniscus = Small coronet or garland; oTHp 



