E. OWEXI. — SPICULATION. 213 



The bascdia (PI. VI, fig. 9) differ in no way from the same 

 of E. marshalli, except in being slightly more slender and in 

 having perceptibly smaller anchor-heads. The anchor-teeth, of 

 which there are 3-7 in each head, are strong and about 40 /i long. 

 The distance from tip to tip of any two oppositely situated 

 anchor-teeth measures 70-85 n. The entire head is of about the 

 same length. The shaft is less than 20 /i thick close to its origin 

 from the head, only about 7 ,« at a short distance above the 

 axial cross, and not more than 30 ,"■ in the thickest part farther 

 above. — Some abnormally formed anchor-heads that I have found 

 are figured in PI. VI, figs. 7 & 8. In one of these cases the 

 teeth are developed only on one side of the miter-shaped knob ; 

 the suppression of the development of teeth on the other side is 

 evidently due to the head having lain with that side pressed 

 against a compact bundle of its fellows. — I have discovered no 

 more peutactin-anchors than Schulze did. 



The der'malia may be nearly 1 mm. long. On tlie whole 

 they are somewhat smaller than in E. marshalli. All the rays 

 are nearly smooth throughout and tapering, but usually bluntly 

 pointed at the free end. Distal hilt-rays mostly 90-130 /i in 

 len2;th and 3-7"., n in breadth near the center. Paratansential 

 rays 110-120 /< long. — Exceptionally and then only along the edge 

 of especially sharp-edged ledges, the dermalia may be of unusually 

 large size. The hilt-ray may here reach a length of 400 n. It 

 participates, together with slender diactins, in the formation of 

 the inconspicuous row of bristles, before mentioned as having 

 been found in a certain specimen. 



The gadralia and canalarla are pentactins showing the rudi- 



