50 
. - wre 
La ‘ ‘ és ! i 
a : : he ict? 
ch Asapnus Caupatus.*  Briinnich. Brongn. Cast 
fx No. 17. et 
La : i ee ae = 
~ Clypeo antice subrotundato, postice valde emargi- 
nato, angulo externo in mucronem producto; oculis 
exsertis, conicis, truncatis, distincte reliculatiss post - 
abdomine in caudam membranaceam, acutam extenso. q 
(Vide Brongniart.) é , * 
The middle lobe of the buckler is marked by three 
transverse plicz or folds on its posterior part, and 
its cheeks or lateral portions are triangular; the pos- 
terior exterior angles of which, are acute, and con- 
siderably elongated. The cheeks are furnished with 
conical, truncated, semilunar and externally convex 
tubercles, which were beyond all doubt the eyes of the 
animal, being reticulated as in those of the Limulus. 
The middle lobe of the back is narrow, and has twelve 
articulations. The lateral lobes are composed of 
double ribbed costal arches. Beyond the lateral lobes’ 
and the caudal termination, there is a smooth, thick 
membranaceous expansion, which forms an acute 
_ projection below the central portion of the tail. 
The specimen in the Philadelphia Museum, by 
which I have identified this species, is marked as 
coming from Ripley, Ohio. It reposes on a frag- 
‘ment of ash ‘coloured limestone—which contains also 
a mutilated specimen of what seems to be a calymene, 
and a few small terebratule, ke. 
* From the Latin word for * talled.’”* 
ry wt P f 4 
Li! ne 2 f SB y. Loy, 
-F ¢ fone eel, 1 Ce ¢ rr had tta f. 
frig) 3 4nd by Heel law Ma 
oe Las as 
<_— ——- ran enh Ch 1A tile ice “ J ¢ 7v y 
