102 SYSTEMATIC ARRANGEMENT 



duh'uix, Münster {Bei fr. 112, Table X, Figs. 1, 4, 5), togetlier with Cal. furcnfa (ibid. 

 Fig. 9.) 



B. The glabella a little broader towards the anterior part, or at least broadly rounded, 

 and more strongly arched at the extremity. The shell has a finer granulation, the eyes are 

 very much elongated, and reach to the posterior margin of the cephalic shield. 



To this group belong, PhiUqma Jonesii, Portl. (30. 8, Table II, Figs. 3 and 5) ; 

 Asaphus Balmanni, Emmr. {Dissert. 36. 21, Gold/, in Lconh. and Bronn. n. Jahrb. 1843, 

 .561. 12) ; PJiiUipsia dnrlai/ensis, De Koninck {Anim. fossile, etc., 601. 2, Table III, Fig. 2) ; 

 Cnlpnene ? cecjnalis, v. Meyer {Nova Acta Phijs. Med. Soc. Cues. Leop. Carol, n. cur. ,xv, 

 2. 100, Table LVI, Fig. 3). 



II. The glabella with only one lateral furrow, which separates one indistinct lobe before 

 the margin of articulation. The eye shorter, but higher, more remote from the glabella, 

 and not projecting so far towards the posterior part. — Griffithides, Portlock. 



a. The cephalic shield with horny, elongated angles, the surface of the shell at least 

 partly granulated (e. g. on the cheeks). 



To this belongs Phillipsia (/lohieeps, De Koninck (599. 2, Table LIII, Fig. 1), and 

 probably also Grißthides lonpsjnnm, Port). 312. Table XXIV, Fig. 12). 



b. The cephalic shield not elongated into processes, the surface of the shell without 

 granulation, but with a lineated sculpture. 



To this belong two species: 1. A. ylobiceps, Mihi {Griff, glohiceps, Portl. 311. Plate II, 

 Fig. 9 ; Asaph, r/lob. Phill. Geol. ofYorhh. 1, Table XXII, Figs. 16. 20 ; Emmr. Dissert, 35. 20). 

 2. A. daviceps, scuto capitis caudoeque subparabolico, angulis illius rotundatis ; axi caudae 

 duodecies annulata, sulcis scuti lateralibus octo. Long. 1", Table V, Fig. 3. 



Archegonus ipqindis. 



Locality. — A grayish-brown grauwacke near Altwasser, in Silesia ; received (from the 

 same locality) from M. Bocksch through M. de Charpentier ; in the Berlin Museum. 



The cephalic shield is somewhat broader than long, the glabella very convex, 

 moderately thickened towards the anterior part, marked by deep, transversely corrugated 

 lines, contracted in the region of the eyes, and there provided with a slight sulcation, 

 which separates an indistinct lobe before the margin of articulation. The posterior 

 extremity of the eye corresponds with this furrow. The margin of articulation projects 

 somewhat at the posterior part ; the cephalic shield has, however, no reflexed, but only a 

 slightly indicated marginal fold. The nine body rings are short, their lateral lobes 

 rather broader than the axis, and very distinctly separated from it ; the oblique transverse 

 furrow is very visible. The caudal shield is parabolic, rather convex, especially the axis, 

 and obtusely rounded. We distinguish in it from ten to twelve rings, separated according 

 to their size, and about eight more depressed lateral furrows, between which there may also 

 be perceived the more shallow diagonal furrows. 



