V 

 Trof. T. R. Jones 8f S. Woodward — PalcBozoic Phyllopoda. 541 



valve. Another specimen (shown by Fig. 2) lies alone on another 

 piece of the same rock. 



The enclosed animal matter expresses itself in the irregularity of 

 the surface of the valves, especially at the antero-ventral I'egion (as 

 in fig. 9a of pi. vii, " Monograph of the Ceratiocaridse," 1888) ; also 

 by small raised spots more or less isolated. Among these, however, 

 there is generally one small pustule that seems to be analogous to 

 the little ocular tubercle in Emmelezoe (" Monograph Ceratiocaridse," 

 Pal. Soc. 1888, pp. 69-71, pi. vii, fig. 9, and pi. viii, figs. 1-3). 

 In one specimen (not figured) it is accompanied by a small scutcheon 

 with a wrinkled pattern. 



The valves are chitinous, amber-coloured, somewhat iridescent, 

 delicately thin, and brittle. The form is obliquely sub-oblong ; 

 somewhat boat-shaped ; nearly straight on the back ; elliptically and 

 obliquely curved below ; broadest (highest) in the anterior moiety, 

 the antero-ventral curve being well developed. The front end has 

 its apex on the median line of the valve ; and is more frequently 

 preserved than the posterior, which tapers, and was truncate with 

 an ogee curve. 



One specimen measures 13 x 6mm. 



Another specimen measures 11 x 4mm. 



Another Specimen (Fig. 2) measures 10 x 4 mm. 



This form is nearest to Emmelezoe Maccoyiana (Monograph, pi. viii, 

 fig. 2) ; it has a greater antero-ventral curve than E. elliptica (fig. 1) ; 

 and it is relatively longer and less boldly curved on the ventral 

 border than E. crassistriata (fig. 3) and JS. tenuistriata (pi. vii, 

 fig. 9). Moreover, it shows none of the striate ornament seen 

 in all these. The absence of this sculpture and the feebleness of 

 the ocular tubercle weaken its apparent alliance with Emmelezoe; 

 but we cannot associate it with Ceratiocaris solenoides, C. inornata, 

 and their allies (Monograph, pp. 48-54, pis. viii and x). 



In the Geological Magazine, Decade IV, Vol. II, p. 170 (April 

 1895), Dr. G. J. Hinde, in an abstract of a memoir by Prof. G. 

 Lindstrom, communicated to the Eoyal Swedish Academy of Sciences 

 in December, 1894, gives an account of the finding of these and 

 other interesting Upper Silurian fossils, including fish-remains 

 (Ci/athaspis). 



3. LiNGOLocARis LiNGUL^coMEs, Salter, 1866. PI. XV, Figs. 3a, 3b. 



In the " Monograph of the British Paleeozoic Phyllocarida " 

 (Paleeont. Soc), 1892, this species is treated of with its Synonymy, 

 at p. 81. 



The Eev. G. C. H. Pollen, S.J., F.G.S., of St. Beuno College, St. 

 Asaph, has kindly communicated a specimen of what seems to be 

 this species from Capel Arthog, between Barmouth Junction and 

 Dolgelly, North Wales. 



It is the hollow cast of the outside of a right valve, lying on a 

 bed-plane of a bluish slaty rock, with ferruginous stains, belonging 

 to the Lingula-flags (probably the Ffestiniog or Middle Division). 



