314 CEETACEOUS PELECYPODA 



I 

 148-151. — A. corharia, suj)racretaceaAMerope, and Gravesii of d'Orbigny are merely knowli 



by name. 



152. — A. Olisijwnensis, Sharpe, probably a Trigonoarca. 



153-151. — A. indinata, Rss., and A. Reussiana, Nystj (angulata, Rss., A. subanrjula!/!, 

 d'Orb.)j are true Arcce. 



155. — A. isopleura, Rss., has an appearance of an Area, but figure and description are 

 insufficient. 



156. — A. Geinitzii, Rss., is a Barhat'ui, (Favre, Moll. foss. de Lemberg, 1869, j). 125). 

 157. — A. fiircifera, Miinst., apparently an Area. 



158-162. — A. jjropinqua, striatiila, hicarinata, of Reuss, tenuistriaia (Favre, JIoll. foss. de 

 Lembcrg, 1869, p. 124,) and racViaia of IMiinster belong to Barbatia. 

 163. — A. arcaeea, Rss., a very small, but typical Trigonoarea. 

 164. — A. Gosaviensis, (Cucullaa) , Zittel, is a very elongated Trigonoarca. 

 165-166. — A. Schwabenaui, inaquidenlata, and Lommelii, Zittel, are Barhatm. 

 167-168. — A. irigonnla, Zittel, and most likely also sl.riadssima, Hag., belong to Area. 

 169. — A. trapezviflea, Gein., is an Aaomaloeardia. 



170-171. — A. undulala and 2^1/gmma, Rss., may be peculiar forms of Trigonoarca, or perhaps 

 of Scapharca. 



172-173. — A. bifida and die/i/opJiora, Rss., resemble Area in external form. 



174. — A. curta, Nyst, 1848 (^= A. Reussi, d^Orb., 1850 = iruncata, Rss., non Sow.), pos- 

 sibly a Grammatodon. 



175. — A. Oetuvia, d'Orb., an Anomalocardia. 



176-179. — A. (Cucullaa) Amiriaca and bifasciata, Zittel, A. carinifera, and glohalosa, Giimljel, 

 (Bay. Alp., 1861, p. 570, non A. globulosa, Desh., 1824). 



180-181. — A. LeopoUensis and Galiciana, Alth, (Favre, M. foss. de Lembg., 1869, pp. 126 and 

 127,) belong to Trigonoarca. 



182. — J. ^ra?»<^a<o-rafi?/«<«, Alth, (Favre, M. foss. de Lembg., 1869, p. 128,) apparently an 

 Area. 



183-189. — A. rhombea, Nilss., (non idem Born, ? ^ glabra. Sow.), subglabra, d'Orb., (glabra 

 apud Goldfuss, pi. 124, fig. 1 c, sed non glabra apud Rss. ^glabra, Park, et Sow. = Cue. 

 carinata. Sow.), ovalis, Nilss., coneentrica of Romer, exaltata, Nilss., C/iimiensis, Giimb., and 

 crassitesta, Zitt., are species of Trigonoarca. 



190-191. — A. tricarinala, Gein., cuneata^ Rom., are quite uncertain. 

 192. — A. deciissala. Sow., is a Cucullaa. 



193-194. — A. (Cucul.J Goldfussi and te.rla of Romer apud Miiller are considered by the latter 

 author to be the same as two forms from the Aachen cretaceous deposits, which probably do not differ 

 from d'Orbigny's subglabra, this being closely allied to our Indian Trigonoarca Gam.ana. 



195-196. — A. orbicularis and Roemeri, Gein., are uncertain; they probably both belong to 



Cucullaa ; the former Reuss states to be the same as his A.vintea insculjjfa, which is not improbable. 



197. — A. seciiriformis,* Kuer., (Denkseh. Akad., Wieu, iii, p. 314, and Favre, M. foss. de 



Lemberg, 1869, p. 129), an ^;r«-like shell, but as the ventral margin does not show a tendency 



to insinuation, it may rather be an elongated Cucullaa. 



198-201. — Area aquilateralis , (non Cue. aquilateralis, Meek), caudafa, exornafa, and On/alii, 

 Briart et Cornet, (Foss. de la meule de Braiquegnies, p. 57 et seq., Mem. Cour. Acad. Belgique, 

 xxxiv, 1870,) partially belong to Cucullaa, partially to Trigonoarca. 



202. — A. Aquisgranensis, Miiller, (Suppl. zur Monog. Pet. Aachener Kreidef., 1859, p. 10,) is 

 either a Barbatia or an Area. 



♦ Non Area sccurifurmis apud Nyst, wliicli is a Dolahra. 



