CRUSTACEA— OSTRACODA. 355 



66. B. granulosa Hall. (Fig. 1663, a.) Siluric. 



Anterior end rectangular or pointed; middle lobe smallest, 

 smooth, others granulated; marginal flange narrow, depressed, 

 smooth. 



Niagaran of Indiana. 



6y. B. waldronensis Ulrich and Bassler. (Fig. 1663, b, c.) Siluric. 



All lobes smaller than in preceding, more distant and all finely 

 granulose; marginal flange broad, flat and striated. 



Waldron shale (Niagaran) of Indiana. 



68. B. moodeyi Ulrich and Bassler. (Fig. 1663, c^.) Siluric. 

 Differs from preceding in its smooth lobes, and narrower and 



more strongly striated marginal border. 

 Monroan of West Virginia. 



69. B. hamiltonensis Jones. (Fig. 1665, /.) Devonic. 

 All lobes very small ; both anterior and posterior lobes furcating, 



surface granulated, some of the granules spinulose at hinge margin. 

 Hamilton shales of New York. 



XXX. Klcbdenia Jones and Holl. 



Differs from Bcyrichia in the shorter and fainter sulci, which 

 define a small median lobe while the others are confluent with 

 marginal portion of valve ; marginal rim narrow or absent. 

 Twenty American species ; nine European. Ordovicic-Devonic, 

 chiefly Siluric. 



70. K. initialis (Ulrich). (Fig. 1663, ^,/.) Ordovicic. 

 Small, median lobe in posterior third; marginal rim very narrow. 

 Black River of Minnesota. 



71. K. manliensis (Weller). (Fig. 1663, (7.) Siluric-Devonic. 

 Median lobe small, nearly surrounded by rather deep sulci ; 



marginal rim very narrow. 



Manlius limestone of New Jersey; Helderbergianof New Bruns- 

 wick. 



y2. K. sussexensis (Weller). (Fig. 1663, /l) Siluric-Devonic. 



Anterior sulcus strong, posterior weak ; marginal rim narrow ; 

 surface granulose ; form elongate. 



Upper Monroan of New Jersey; Helderbergian of New Bruns- 

 wick, etc. 



