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FIG. 
PLATE 37. 
. GERVILLIA MONTANAENSIS....-----------------0= Peeps es ashe ara aoe 5 Hae 
a. Right valve; large example; natural size. 
b. Left valve of a smaller example. 
Ju MOESELLA: SUBIMBRIEO AWA) 0) iver nips seed ee Sey Wn nea a aes ules 0c, 51S. 2 na aan 145 
a. Left valve of one of Mr. Meek’s types; natural size. 
b. Left side view of a smaller example from Northwestern Colorado. 
c. Dorsal view of the same. 
. VOLSELLA (MODIOLENA) PLATYNOTA .....-..---.----.----- fiat s eee 146 
a. Side view of a natural cast of the right valve; natural size. 
b. Outline of transverse section, showing the great convexity of the 
valves at about midlength. 
(AVICULOPECTEN SUPE RSERICTUS tse seo eee eicne oeelsiciee eee. oes 144 
a. Left valve; natural size. 
db. Outline, showing convexity of the same. 
. CAMPTONECTES, PLATESSINORMIS care see sasneee nee coenicnse cc cece cscs Smae 
a. Left valve; natural size. 
2 AS TAR TE PA CRA RD 22 ea alia Saenger ee earemretame ny: JAK) 
a. Left valve; natural size. 
b. Outline, showing convexity of the valves. 
i 
) \COARDINEA “PR AN CTGAs 2 5a Gorse ae ene eee et ea pane et es 
a. Right side view; natural size. 
b. Dorsal view of the same. 
5 SGONTOM VAC MON TAINA TENS IS oppo erie pe eye aL See 151 
a. View of Mr. Meek’s type specimen ; natural size. 
o MY TTILUS. WHITER 22/2 2:25 S55 So Se eres ee ery eter iio oA a 147 
a. Left valve; accidentally somewhat compressed; natural size. 
