1888.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 445 



marginal rim strong aud separated from the body by a well defined 

 sulcus. 



Thorax with seven segments ; axis with a central spine on each seg- 

 ment; pleural lobes with a broad groove; anterior lateral ends of pleurae 

 faceted. 



Pygidium short, transverse, four to five segments in the axis, lateral 

 lobes slightly grooved. 



Surface granulose. 



Types : Karlia minor aud K. stephenensis. Generic name proposed in 

 honor of Dr. Karl Kominger. 



Karlia minor n. sp. 



Form elongate-oval, convex. Average size, 7 mm in length by 3 mm in 

 breadth. Head longitudinally semicircular, convex; frontal rim a nar- 

 row margin which passes iuto a stronger rim on the sides. Glabella 

 clavate, expanding froai the base to twice the width in front, marked 

 by four pairs of short, faint glabellar farrows; occipital furrow deep; 

 occipital ring strong and with a sharp, slight node at tbe center. The 

 broad, deep, dorsal furrows unite with the posterior furrows to separate 

 the strongly convex, subtriaugular fixed cheeks; eye lobe short, nar- 

 row, aud defined by a well-marked groove from the cheek; the groove 

 extends forward to the dorsal furrow. Free cheeks narrow; marginal 

 rim round and strong; posterior angle pointed, but not known to be 

 extended into a spine. 



Thorax with seven segments; median lobe convex and with a very 

 short node or spine at the center of each segment; pleural lobes flat to 

 the geuiculation of the pleurae, where the outer half of the segments are 

 bent obliquely downward and slightly backward; pleural groove the full 

 width of the segment to the geuiculation, where it abruptly tapers to a 

 point by the cutting in of the facet on the anterior side of the segment. 



Pygidium of medium size, transversely semicircular; axis convex and 

 crossed by three or four rings and the terminal lobe; the rings are ex- 

 tended out on the lateral lobes as broad, low ridges trending obliquely 

 backward to the rounded margin. 



Surface of the head granulated; thorax aud pygidium apparently 

 smooth. 



All the specimens seen are sma'l, none exceeding 10 ram in length. 



Formation and locality: Middle Cambrian; Manuel's Brook, Cone-,) 

 tion Bay, Newfoundland. This species is associated with Microdiscus 

 punctatus, Paradoxides davidis, etc. 



Karlia stephenensis n. sp. 



Menocsphalus salteri (?) Rorainger, 1887. Proc. Acad. Nat. Sci. Phila., pt. 1. p. lo 

 pl.i, fig. 6. 

 This species differs from the K. minor in its greater size, 40""" in 

 length by 30 mm in breadth ; the fixed cheeks are wider aud the grooves 



