Page:Report of the Second Norwegian Arctic Expedition in the "Fram," 1898-1902 (volume 4).djvu/196

 \s “(051 samrs B, 47 Expedition 1 have tween ntite tn identity in a Mack limestone. \\'ltit'll is distinctly ditterent tram the nwre ligtit-mlnred, grey nr liruwn. limestone. with L. phoca, a tnuna that is nnt only Devonian, ltltl lwynnil all doulvl. high Devonian, its age probably rnrrespnndinf‘r with the Clielnnng. 'l‘ln- tussils are the following:

Schizophoria striatulu Snnmn.. twn speuinwns. one showng clearly the interior characters ot the ventral valve,

Aim/pa relicularis LlN., numerous large. (n: sely plirated and

wrinkled specimens. Spirifer whitneyi HALL. var. uninmsmsis Gm'rr. one t1t)t|l[tletB and several fragmentary specimens. Spirifer whitncyi is a typical (lhem-

‘lved trum

ning form and the clasely related variety animusmzsis is (to the lower part of the In'ay limestone oi (lnlnrado which is partly high Devonian, partly lower Cartmniterous.

Cyrtina yjr‘mi nov. sp. PI. Vt. tig.S. A considerable number nl well preserved specimens occur at this turn], whirl! though much like several (it the American Devonian (lyrtinas, do nut tully agree with

any of them. The ecixnens are very small, greatest width observed

9 mm., corresponding to a length at (3.5 mm. Ventral Valve is gluhose hemi-rnnical with the height varying greatly from less than the width to considerably more. On both sides at a relatively broad but not deep, in section snbtriangular, sinus, 47:3 rounded tnlds. the more central ol which are well marked, The snhlriangnlar area have the sides a little curved outwards, the form of the area ut the elevated specimen therefore like the half of a transverse section ul a thirk lens. tVidth ot the prominent pseudotleltidium one third at the total width of the area. Adult specimens, shmv marked strife on the area and wrinkles of growth on the broader part of the valve. The dorsal valve is semi-elliptical in outline, slightly convex with a quite prmninent round Incdinn laid and 4—5 smaller lolds on each side. Adult specimens show one or more lines of growth near the rounded margin.

This form comes nearest to Cyrtina Llutmani l‘l.\t.t. lrnm the lnwel' Helderherg, but is distinrtly more gtnhose, less {lt'tllt‘ towards the apex.

Loamneum sp Slmparollus sp.. ,, 7 PI/ttycems sp., .. 7

very fragmentary.