224 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



KA.RLIA MINOR Walcott 



Plate 36, figs. 7, "ja-c 



Karlia minor Walcott, 1889, Proc. U. S. Nat. Mus., Vol. 11, p. 445, 

 (Described as below.) 



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

 3 mm. in breadth. Head longitudinally semicircular, convex ; frontal 

 rim a narrow margin which passes into a stronger rim on the sides. 

 Glabella clavate, expanding from the base to twice the width in front, 

 marked by four pairs of short, faint glabellar furrows; occipital 

 furrow deep ; occipital ring strong and with a sharp, slight node at 

 the center. The broad, deep dorsal furrows unite with the posterior 

 furrows to separate the strongly convex subtriangular fixed cheeks ; 

 eye lobe short, narrow, and 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 geniculation of the pleurae, where the outer half of the 

 segments is bent obliquely downward and slightly backward ; pleural 

 groove the full width of the segment to the geniculation, 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 extended out on the lateral lobes as broad, low ridges trending 

 obliquely backward to the rounded margin. 



Surface of the head granulated; thorax and pygidium apparently 

 smooth. 



All the specimens seen are small, none exceeding 10 mm. in length. 



Formation and locality. — Middle Cambrian: (i) Manuels forma- 

 tion; Manuels Brook, Conception Bay, Newfoundland. 



KARLIA STEPHENENSIS Walcott 

 Plate 36, fig. 8 



Menocephalus salteri ? Rominger, 1857, Proc. Acad. Nat. Sci., Philadelphia, 



Pt. I, p. 16, pi. I, fig. 6. (Described and figured.) 

 Karlia stcphenensis Walcott, 1889, Proc. U. S. Nat. Mus., Vol. 11, p. 445. 



(Described as below.) 

 Karlia stcphenensis Walcott, 1908, Canadian Alpine Jour., Vol. i, No. 2, 



pi. 3, fig. 4. (Specimen figured.) 



