182 



LiNGULA (Glossina) lhaxa. Hall, i t'ig. T9.j (Pal. 

 N. Y., Vol. IV., p. 9, PI. II.) 



Distinguishing Cliaracters. — Size : robust character; 

 pointed posterior ( beak) end, with sides 

 gradnally sloping ontward for two-thirds 

 the length ; ronnded anterior end : some- 

 what greater convexity near the beak 

 than near the front; fine concentric 

 t;-rowth lines and occasionally faint radiat- 



FiG 7it. L.ngulaleanr-. ... 

 Ventral valve, natural lllg lllieS. 

 size (from Hall). Z^ . . »,;-,._ 



I his species was lonnd at Section < . 

 between eight and fourteen feet, and at twenty feet, below 

 the Encrinal limestone. 



Mensurenients. — 12 by 9 mm., also 13 mm. by 10 mm. in 

 greatest length and width. 



LiNGULA DELIA. Hall. ( Fig. 80.) ( Pal. N. Y.. Vol. IV., 



p. 12. PL H.) 



,' W^, Distinguishing Chnmcters. — Length 



,i about twice the width; abrnptly sloping 



ii % 4^ cardinal margins; gently carving sides: 



rounded front; fine lines of growth, and 



'"K.,^-- occasionally coarser concentric lines; a 



FiG.so. Lingidadeiia. median loiioitudinal depression appears in 



Natural size {from Hall). c> I 11 



one valve, marking the ])Osition of a septum. 

 Found in the Demissa bed, at Section 5 : ten feet below 

 the Encrinal limestone, at Section 7 ; and twenty-five feet 

 below the Encrinal limestone, in Idlewood Ravine. 



LiNGULA SPATULATA. Vauuxem. ( Fig. 81.) ( Pal. N. Y., 

 Vol. IV.. p. 13, PL I.) 



Distinguishing Chnravters. — Sum 11 size, spatu- 



late form; general form and proportions similar 



to ])receding, but very much smaller; outline 



somewhat variable ; occasionally acutely pointed ; 



fine concentric growth-lines; occasional faint 



Fig. 81. Lin- radiating strisB. 



i;nUrKed."'x'4; Fouud iu the Upper Naples (Gardeau) shales 



(Original.) ' '^' Oil tlic Lake Shore ; in the Lower Naples 



