428 CEETACEOUS PELECYPODA 



Pi'c(en and its sub-genera, (vide Pict. and Camp., 1. cit., p. 210). 



1-2. — Peden Astierianus, d'Orb., (= Euthpni, Pictet), Mariinianus, d'Orb. 



3.4. — (?Pect.) icaunensis, Cott., f F Fed. J jjfobosculeus, d'Ovh. ; these two species appear 

 t(> be closely allied to C/euostreon (see p. 413). 



5-15. — p. GoM/iissi, Desh., P. \^? Chlamys\ lineato-coslahis, Roemer (Ool., pi. 18, fig. 27), 

 P. Archiacianns, d'Orb., P. sanctee-crttcis, P. and Camp., P. Cuiieroni, d'Orb., P. Lanlyi, P. and 

 C, P. Urgonensis, Lor., P. Lauderonensis, Lor., P. Coquandianus, d'Orb., P. Rohinaldinm, 

 d'Orb. (^^ohliquns, Yovhes, = iufersfr/afiis, Leym., = apiiensis, P. and Roux) ; P. Oosieri, Lor. 



16-17. — P. [Camptonedes] striato-jmncfatiis, Rcemer, P. [Camp(o?iedes] arzierensis, Loriol. 



18-22. — P. [^Pseudamusiuni] alpinus, d'Orb., (= P. Agassizi, Pict. et Loriol), P. \_Syncy- 

 clonema'\ Coffaldinus, d'Orb., P. \_PseHdamHsiitm'] crassitesta, Rcem., P. [Synci/doiiema'] Maihero- 

 iiianiis, d'Orb., (pulchcllus , Math., non Nilsson), P. \Cainptonedes\ Ltisitamcus , Sharpe. 



23-37. — P. [ ? Syncyclonemii] Greppini, P. and Renev., P. apfiensis, d'Orb., (interstriatm, 

 d'Orb., non Miinster), P. Baiiirei, Coq., P. Morellensis, Coq., P. Achates, Coq. 



28-38. — P. Bufeiiiplei, A'Orh., P. Pa?ilinia)iHS, d'Ovh., P. \_CJdamys] RJiodcaii, P. and Roux, 

 P. Sa.ronell, P. and Roux, P. Picordeanus, Cott., P. \_? Syncyclonema'] Darius, d'Ovh., P. Vraco- 

 nensis et Vifeli, P. and Camp., P. \^Syn.cydonema'] orbicularis, Sow., P. \Chlamys\ asper. Lam., 

 P. ( ? Pseudamusiwn) p)ygmaus, Buv. 



39-41. — P. compositus, Milleri et Siuichhurianns, Sow. 



42. — P. Beaveri, Sow., resembles in shape and in the form of the ears Amusium, but the 

 radiating ribs are of exactly the same character as usually seen in Chlamys. 



43. — P. iriplicatus, Mant. The description does not exactly correspond with the figure; 

 the latter represents an imperfect shell, more resembling the flat valve of a Tola than anything 

 else. 



44-50. — P. ohliquus, Sow., P. [Chlamys'] cenomanensis, d'Orb., P. subaeutus, Lam., f=Bro/ig- 

 niarti, d'Orb.), P. dongatns, Lam., P. Galliennei, d'Orb., P. \8yncyclonemd\ Neptuni, d'Orb., 

 P. [Syncydonema] Calypso, d'Orb. 



51-60. — P. \_Campfonectes'] Rotomagensis, d'Orb., P. Passyi, snbdepresstis et subinterstriaUis, 

 d'Arch., P. ICamptonedesI virgatus. Nils, (non idem apud d'Orbigny, »;V/e p. 433), P. Puzosianus, 

 ]\Iath., P. \_Syncyclonemd\ Requienianits, Math., P. Barbesillensis, P. Marrottiamis et Royanus, 

 d'Orb. 



61-70. — P. Bspaillaci, d'Orb., P. crefosuSiDeh-., f=aracknoides, Defr., sed non = P. Zeiszneri, 

 Alth), P. Maniellianns, ( = concentricus, Woodw.), Campaniensis, and Girondimis, d'Orb., 

 P. medioplicaius, Regleyi et recurrens, Coq., P. ilatronensls, d'Orb., P. Palassoui, Leym. 



71-80. — P. \_?Amiisium'] Nilssoni, Goldf., P. [_Chlamys'] Bujardini, Roem., P. [Pallinm seu 

 Chlamys'] asellus. Sow., P. nitidus,* Mant., P. \_? Syncydonema] ;<«m. Nils., P. \_Syncyclonema'] 

 membranaceus, Nilss., P. [Psetidanmsitim] circularis, Goldf, P. \_Pseudamusium] subsquamula, 

 d'Orb., P. [^? Syncydonema] exilis, Reuss, P. \_Cawpfonedes] occnUe-striafus, Zitt. 



81-90. — P. [Pseialamiisii(?n] pusillns, Alth, (non P. ;;?/*///««, Miiust. ex Schlotheimi Biscife 

 jnisillo apud Goldfuss); P. [Pseudamusium seu Amusium] abbreviafus, rotundatus, Jugleri eilatus, 

 Hagenow, P. \_Camptonectes] curvatns, Gein. (= ? divaricatus, Reuss), {_Camp.] concentrice-punc- 

 tatus et granulifer, Reuss, P. spatnlaformis, Reuss, P. \Camp^ fraudaior, Zittel. 



91-100. — P. comans, Room., P. serraius, Nilss., P. hispidus, Goldf., P. acuminatus, Gein.,t 

 P. [Chlamys] sqKaniifer,X Gein., P. [ ? Chlamys] depressus, Munst., P. pulchelliis, Nilss. (= /'siib- 



* Appears to be more numerously ribbed than cretosns of Defrance ; it is not probable that both are identical. 

 t P. decipiens, Reuss = Tola Imvis, Drouet. 



X Geinitz and Pictet consider Miinster's P. decemrostatus as probably identical with tliis species, but Bosquet 

 quotes the former as distinct, (Fauna and flora of Limbourg, Staring's Bodem van Nederland, Il^e deel). 



