BIBLIOGRAPHICAL SKETCH. 41 



undescribed species of Lamellibranchiata from the Carboniferous Series of 

 Scotland" was published, when the following new species were described pp. 



297, 298 : 



Conocardium decussatum. 

 Pteronites regularis. 



Myacites ? {AUorisma) tenuilineata. 



Later in 1873, and in the same volume, p. 344, is another of his " Contributions 

 to Carboniferous Palgeontology," " On some further undescribed species of 

 Lamellibranchiata from the Carboniferous Series of Scotland," in which is a 

 review of the genus Pteronites, M'Coy. 



The new species, mentioned in his Appendix to the Memoirs Geol. Survey 

 Scotland, Explanation of Sheet 23, are here described and figured (pi. xii, 

 figs. 5—7) : 



Pteronites Jluctuosus. I Leda intermedia. 



Aviculopecten ornatus. \ 



On the same plate xii, which was not published till September, figures are 

 given of the species described in July {vide supra). 



1873. In the fifth vol. of the 'Geological Survey of Illinois,' dated 1873, 

 Messrs. Meek and Worthen describe and figure the following new Lamellibranchs 

 from the Lower Carboniferous, St. Louis group (pi. xxii) : 



Lithophaga ? pertenuis, 

 Myalina Sancti-Ludovici, 

 Ghsenomya ? rhomhoidea, 



AUorisma sinuata ? (without any notice 

 in the letterpress of the last) ; 



and the following new forms (pp. 573 — 586) from the Coal-measures (pis. xxvi 

 and xxvii) : 



Monotis ? gregaria. 

 Macrodon delicatus. 



— tenuistriatus. 

 Avicula Morganensis. 

 Flacunojjsis carhonatna. 

 Schizodus amplus. 



— perelegans. 



Schizodus curtus. 

 ClinopistJia radiata, var. Isevis. 

 Edmondia ? perohlonga. 

 AUorisma costata. 



— Qeinitsi. 



Chifenocardium ovatum. 



Figures of ten other previously described bivalve shells are also given. 



1874. A paper entitled " The Fossils of the Carboniferous Strata of the West 

 of Scotland," by J. Young and James Armstrong, read March 13th, 1873, 

 published in vol. iv, p. 267, of the ' Transactions of the Geological Society of 

 Glasgow ' gives a list of the fossils found in the district of Robroyston. 



1874. In dec. 2, vol. i, p. 300, of the ' Geological Magazine,' is a paper entitled 

 " Notes on Carboniferous Lamellibranchiata (lfo?io?)i//rtr('ft)," by R. Etheridge, jun. 



6 



