('((rbonifennis Ti-ilobiles. 101 



Loruliiij II ml position — U])per Coal Measures, Springtield, III. 



Cuni|)are Fliillipsia Howi, Billings, Can. Nat., Vol. VIII, p. 

 ■^07. This species was described from a pygidium from the 

 Lower Carboniferous beds of Nova Scotia. It has the same 

 semi-elliptic form, a prominent tapering axis, which terminates 

 abruptly, i)osteriorly, at the marginal border of the jjygidium. 

 The axis is marked by 17 or 18 axial rings. The side lobes are 

 dei)ressed below the plane of the axis and marked with 10 or 12 

 ribs ; the first three or four being grooved along their outer por- 

 tions. This is a greater number than those of the specimen 

 from Springfield, Illinois. The sides of the pygidium are bor- 

 dered by a marginal rim, which widens out posteriorly; and 

 altogether both in size and form this j^art approaches closely to 

 that described by Messrs. Meek and Worthen as Pliillipda {Ginf- 

 jith ides) Sang amonensis. 



GRIFFITHIDKS UKANUL,ATUS. 



Pn/ctii.s <ji((i(iil(itiif<, Wetlieiby, lb81 ; Jour. Cincinnati l^oc. Nat. Hist., Vol 

 IV, -p. 81. pi. 2, figs. 8, ^<i, 9, \)<i. 



The following is a C()])y of the original description of this spe- 

 cies : 



■■ Bodij — General lorni elongate elliptical, tlie cephalic, thoracic and ab- 

 (loiniiial regions t)eing nearly equal in length, the thoracic slightly shorter. 



Ilrdl. — Rounded in front, the angles of the cheeks produced backward 

 into short iieavy spines ; glabella ver}^ prominent, slightly constricted near 

 th.' CL-ntre. surface granulated, lobed posteriorly, occipital furrow well de- 

 tined ; cheeks margined, the margined space longitudinally striated, and 

 much narrowed in front of the glabella ; eyes prominent, separated from 

 the glabella b}" a deep groove ; entire surface of the head minutely granu- 

 late.^ 



Thorax. — Consisting of 10 ? segments ; axial lobe very prominent, about 

 equal in width to the lateral lobes, the segments slightly arched forward in 

 the middle, nearly or quite equal in length ; lateral lobes about as wide as 

 the central, geniculate, with the extremities of the pleurae directed backward. 



'' Pygidhun — Semi-elliptical, consisting of 15 ? segments. Axial lobe 

 prominent, narrower than the lateral lobes, segments not arched, gradually 

 tapering backward to the margin ; lateral lobes wider in front, tapering 

 posteriorly, widely margined, the margin continuous and granulated. 

 Length of medium sized specimen, 20 mm. ; width across from tip to tip of 

 spines, 10 mm. ; length of largest specimen, 26 mm." * * * 



Geolor/ical jwsltioii /iml locality. — Chester series, Pulaski Co., Kentucky." 



