Vol. 6S.] PALa:ozoic eocks of the kilbeide peninsula. 101 



had been sent to him by a friend from the deserted pool of Gihon, 

 near Jerusalem.^ 



I believe this is the first ancient Phyllocarid in which traces of 

 eggs have been observed within the bivalve shell of the parent. 

 Eggs (in clusters) called FarJca decipiens have been noticed with 

 remains of Pterygotus in the Old Red Sandstone of Trimpley, north 

 of Bewdley.^ 



The curious fringe of cirrus-like spines on the anterior (oral) 

 border of the carapace has not, I believe, been before observed 

 in any species of Phyllopod, and deserves especial notice. 



I venture to designate this interesting Phyllocarid as Caryocaris 

 l-ilbridensis, after the locality where it was discovered by 

 Mr. Gardiner and Prof. Eeynolds, to whose kindness I am indebted 

 for the privilege of examining it. 



EXPLANATION OF PLATES VI & VII. 



Plate VL 



Geological map of the Kilbride Peninsula, on the scale of 

 4 inches to the mile or 1 : 15,840, 



Plate VII. 



Fig. 1. Spilite, showing the concentric arrangement of the vesicles in regard to 

 the margins of the ' pillows.' (See p. 82.) 

 2. Chert, associated with spilite, in the form of irregular strings and 

 patches. (See p. 82,) 



Discussion. 



The Peesident (Prof. Watts) congratulated the Authors on this 

 addition to the important series of papers which they had presented 

 on the Palaeozoic rocks of the West of Ireland. He enquired whether 

 the Trimicleus said to occur in Silurian strata was not a derived 

 form, and cited an analogous occurrence of Trinucleus in the Silurian 

 of the Onny-Eiver district of Shropshire, where it was undoubtedly 

 derived. 



Dr. A. Wade, after congratulating the Authors upon this further 

 development in their very important work in the West of Ireland, 

 said that the point of special interest to himself was the close 

 parallel which existed between the succession of the beds, from the 

 Llandovery Conglomerate to the base of the Wenlock, in this area 

 and in the Welshpool District. This similarity became more marked 

 when one considered the bostonite-like rocks intruded near the 

 base of the Silarian. Some complex faulting made the position of 

 the Welshpool Dyke somewhat obscure, but the speaker had come 

 to the conclusion that it occupied a position very similar to that 

 held by the keratophyres described by the Authors. The micro- 

 scope slides and descriptions showed how closely the rocks resembled 



1 See_ Annals & Mag. Nat. Hist. ser. 3, vol. iv (1859) pp. 280-83 & pis. v-vi 

 [Estheria gihoni, Ba/phnia atkinsoni, Cypris celtica, C. orientalis, & Biaptomus 

 similis] ; and in a second paper, o^j. cit. vol. viii (1861) pp. 209, 210 & pi. xii 

 [Branchipus eximius]. 



2 See H, Woodward, Monogr. on Merostomata, Pal, Soc, 1871, p. 79 & 

 pi. xvi, figs. 10-11, 



