A Sftidi/ of tin; Jielridere Jictls. — (■'riniin. 
369 
considerable number of invertebrate forms, eliietty molluscan, 
the fauna of the Champion shell-bed being remarkably'- large 
for a stratum so limited in vertical and geographic extent. 
Tims far the Champion shell-bed has not yielded the remains 
of any Vertebrata, but the forms of Invertebrata known from 
it already number thirty-six, or more than half of the entire 
number known from the lower Cretaceous sediments of Kan- 
sas south of the Arkansas river. 
FAUNA OF THE CHAMPION SHELL-BED. 
**Aiitmccenia nidiformis Cragin. *Aiitayte pikensh Hill. 
*HoJectypuii planaha^ Eoemer. 
iNereis incogniia Crag. 
**Serpida chanq^iorti Crag. 
"fOstrea suboi^ata Shum. 
*Ostrea roanokensis Crag. 
*GrypJicea hUU Crag. 
-\Exogyra texana Roem. 
fAnoinia sp. 
"fPlicatnla ineongriia? Conrad. 
*Lima semdaris Crag. 
fVola oecidentalis Con. 
fAvicida belriderensis Crag. 
'\Modiola concen irice-cosieUata ? 
Roem. 
*Pinna comancheana Crag. 
^Cuctdlcea recedens Crag. 
**Liinopiils fiubimhric<da Crag. 
"f Trigonia emoryi Con. 
'\ Remondki ferrissi Crag. 
^Cardita belviderensia Crag. 
fCai-dtinn kaiisafsensis Meek. 
**C'aidiiiiii bisohi)is Crag. 
i Tapes beh-iderensis Crag. 
^Cyprimcria texana Roem., var. 
kioicana Crag. 
fPJroladomya sancti-Habce Roem. 
*Honioinya alta Roem. 
f Margarita laavconaua Crag. 
( luudgei? Mk.) 
**Marga)'ita neicberryi Crag. 
^Tiirn'tella seri(di)n-gra)iulata 
Roem., var. inaruochi White. 
*fTitrHteUa {LiiliotrocJinsj cf. 
humboldti Von B. 
fTytostoma iumida Shum. 
iNatica? cossatotensis Hill. 
■fAvchitra kiowana Crag. 
-^Scluoerd>achiaperui'iana Von B. 
-\Sphen od Incus beJridereit s is 
Crag.* 
Of these 36 forms, the 22 marked with the dagger are, and 
the 34 marked with single or double asterisk are not at pres- 
ent known to extend from the Champion shell-bed up into the 
Kiowa shales. The number common to the Chami)ion aiul the 
Kiowa is, however, likely to be increased by further explora- 
tions more than the number not thus comnuui. Of tiie forms 
that are not known to range higher than llic ('hanii)ion, the 
six marked with the double asterisk are not known outside of 
the Belvidere district, being strictly peculiar to theChami)ion 
shell-bed so far as yet learned. The eight marked witii a 
*Called Ammonites belviderei in 1890. (Bui. W. C. L. N. H., No. 11.) 
Small exaniple.s illustrated in figm-es :3. 4 and .") of jjlate T in voUuiu' xiv 
of the American Geolocjist. 
