Notices of Memoirs — Prof. T. R. Jones — Phyllopoda. 513 



tion of the old eruptive cone is very strikingly seen by comparing 

 the photograph, taken a little over a year ago and published in the 

 last report, and the present one (photographs exhibited). 



Since I quitted Naples an actual crateret has opened in the Atrio 

 at the point where these fumaroles stood, and several gushes of lava 

 have taken place. I shall more fully report on these new phases 

 on ray return to Naples. 



III. — Ninth Eeport of the Committee, consisting of Professor 

 T. Wiltshire (Chairman), Dr. H. Woodward, and Professor 

 T. Eupert Jones (Secretary), on the Fossil Phyllopoda of the 

 Palaeozoic Eocks. (Drawn up by Professor T. Eupert Jones.)^ 



EIGHT reports by this Committee have been handed in and 

 printed, the last in 1890. Part I. of the ' Monograph on the 

 British Fossil Phyllopoda,' by Prof. T. Eupert Jones and Dr. H. 

 Woodward, published by the Palasontographical Society, contained 

 twelve plates, illustrating thirty-nine species, belonging to four 

 genera of Phyllocarida [Cer alio car idee) therein described. Part 11. 

 of that Monograph is now finished, and has five plates of twenty- 

 eight species in seven genera (including some of both the bivalve 

 and the univalve Phyllocarida). 



The genera here treated of are Hymenocaris, Lingulocaris, Sacco- 

 caris, Caryocaris, Aptychopsis, Peltocaris, Pinnocaris, and Discinocaris. 



I. Of Hymenocaris we know of only two species, both British, 

 namely, (1) H. vermicauda, Salter, very common in some beds of 

 the Lingula-flags in North Wales ; and (2) H. lata, Salter, repre- 

 sented by a unique and distorted specimen from the same strata. 



II. Of Lingidocaris there are (1) L. lingulcecomes, Salter; (2) 

 L. siliquiformis, Jones; and (3) L. Salteriana, T, E. J. and H. W. 

 These are from the Cambrian of North Wales. 



III. Saccocaris major, Salter, from the Lingula-flags, and S. minor, 

 T. E. J. and H. W., from the Arenig series, are described and figured. 



IV. Caryocaris Wrightii, Salter, and the thinner C. Marrii, Hicks, 

 from the Skiddaw slates of Westmoreland, are fully treated of; and 

 it is suggested that the latter form is possibly due to a sexual 

 difi"erence. 



V. Of Aptychopsis we have recognized thirteen species, mostly 

 British : 1. A. prima, Barrande, with its varieties longa and secunda, 

 all Bohemian. 2. A. Barrandeana, sp. nov., and its variety brevior, 

 nov. 3. A. cordiformis, sp. nov. 4. A. lata, sp. nov. 5. A. 

 glabra, H. W. 6. A. Wilsoni, H. W. 7. A. Salteri, H. W. 8. A. 

 Lapioorthi, H. W. 9. A. ovata, sp. nov. 10. A. subquadrata, sp. 

 nov. 11. A. angidata, Baily. 12. A. oblata, sp. nov. 



Nos. 5 and 8 are probably represented among the several figures 

 of various forms of ' Aptychopsis prima ' given by Barrande in his 

 Syst. Silur. Boheme, vol i., Sujoplement, 1872, plate xxxiii. 



Nos. 10 and 11 are from the Silurian of Ireland; the others 

 (excepting No. 7, from South Wales) are from the Moffat series of 

 South Scotland. 



^ Read before (Section C) British Association, Edinburgh, August, 1892. 



DECADE III. — VOL IX. — NO. XI. 33 



