A. Smith Woodward— On Ceraterpeton Galvani. 203 



been referred to the Cretaceous system. EstJieri'ina is certainly 

 characteristic of the Brazilian shales in Hartt's "Bahian" series; 

 some of its analogues are far back in the Carboniferous system. 

 JSstheria Forhesii and S. Mangaliensis are such as lived in a late 

 Secondary age ; ^ M Maiosoni has the ornament characteristic of 

 some species of early Secondary, or rather earlier date. 



EXPLANATION OF PLATE X. 

 Fig. 1. — Estheria Aricensis, sp. nov. Left valve, magn. 3 diam. 

 Fig. 2. — The same. Left valve, magu. 3 diam. 

 Fig. 3. — The same. A large specimen, drawu from a hollow mould of a left 



valve, magn. 3 diam. 

 Fig. 4. — Estheria Ghilensis, Philippi. Eight valve, magn. 3 diam. 



Figs. 1-4, from Arica, Peru, collected by David Forbes, are in the British 

 Museum. 



'Fig. 5. — E. Chilensis, after Philippi. Nat. size. 

 Fig. 6. — Cyciestherta Mislopi, after Sars. Magn. 3 diam. 

 Fig. 7. — Estheria subconcentrica, after Krotow. Nat. size. 



EXPLANATION OF PLATE XL 

 ~FiG. 1. — Estheria Forbesii, Jones, a, left valve, magn. 3 diam. ; b, part of the 



superficial ornament, magn. 75 diam. From Cacheuta, Argentine; 



collected by D. Forbes, and in the British Museum. 

 "Fig. 2. — A group of the same species, after Philippi. Nat. size. 



■ Fig. 3. — Estheria Mawsoni, sp. nov. a, carapace, showing the left valve ; 



b, end view ; c, edge view, a, b, c, magn. 6 diam. d, e, f, g, parts of 

 surface, magn. 75 diam. 

 Fig. 4. — The same, variety or 5 • ^> l^ft valve imperfect, magn. 6 diam. ; 



b, part of surface, magn. 75 diam. 



Fig. 5. — The same, variety or 5 • ^^ internal cast of a left valve, showing 

 radiating lines caused by the decomposition of the test and its minute 

 interstitial barrolets ; magn. 6 diam. 



■ Fig. 6. — The same, variety or 2 • <^) carapace showing left valve ; b, edge view ; 



c, end view : all magn. 6 diam. 



-Fig. 7. — The left valve of a variety of E. Mawsoni. Shorter and squarer than the 

 other examples, magn. 6 diam. 

 Figs. 3-7 from the Bahia and San Francisco Eailroad, at 12-13, 73-74, 82, and 

 84-5 kilom. from Bahia. 



Figs. 8-14. — Small Ostracoda (possibly Cythere, Cytheridea, Cypris, Candona, 

 and Metacypris) ; magn. 40 diam. 



II. — On a New Specimen of the Stbgocephalan Ceraterpeton- 

 Galvani, Huxley, from the Coal-measukes of CastlecomePv, 

 Kilkenny, Ireland. 



By Arthur Smith "Woodward, F.L.S., F.G.S. 

 (PLATE XII.) 



SINCE the original description of Ceraterpeton by Huxley thirty 

 years ago,' several specimens have been referred ^ to this 

 interesting Stegocephalan genus, one even to the typical species, 



1 See " Monogr. Foss. Esth.;' Pal. Soc. 1862, Table, p. 114. 



2 Huxley and Wright, " On a Collection of Fossil Vertebrata from the Jarrow 

 Colliery, County of Kilkenny, Ireland" : Trans. Roy. Irish Acad., vol. xxiv (1867), 

 p. 354, pi. xix. 



3 E. D. Cope, "Synopsis of the Extinct Batrachia from the Coal-measures 

 [of Ohio]," Eep. Geol. Surv. Ohio, Palajont., vol. ii, pt. 2 (1875), p. 372, pi. xli, 

 tig. 4 ; pi. xlii, fig. 2. A. Fritsch, " Fauna der Gaskohle," vol. i (1880), pp. 136-4U, 

 pis. xxvii-xxx. 



