186 CLASS II. BRACHIOPODA. FAMILY 2. ADFLERENTIA. 



Examples. 

 PL CXXVI1I. Fig. 1 and 2. 

 Crania personata*, Lamarck, Anim. sans vert., new edit, vol. vii. 

 p. 298. Enc. Me'th., pi. 171. f. 1, 2. Sowerby, Trans. Linn. Soc, 

 vol. xiii. pi. 26. f. 3. 

 Anomia craniolaris, Linnaeus. 

 (An odd valve) Patella distorta, Montague. 



PI. CXXVIII. Fig. 3. (fossil.) 

 Crania Parisiensis, Defrance, Diet. Sci. Nat. Sowerby, Min. Conch., 

 pi. 408. Hceninghaus, Monog. of Crania, f. 8. 



PL CXXVIII. Fig. 4 and 5. (fossil.) 

 Crania nummulus, Lamarck, Anim. sans vert., new edit., vol. vii. 

 p. 300. Hceninghaus, Monog. of Crania, f. 5. 



PL CXXVIII. Fig. 6. (fossil.) 

 Crania costata, Sowerby, Genera of Shells, No. 12. Hceninghaus, 

 Monog. of Crania, f. 11. 



PL CXXVIII. Fig. 7. (fossil.) 



Crania antiqua, Defrance, Diet. Sci. Nat., pi. 80. f. 1. De Blainville, 

 Manuel de Malacologie, pi. 59. f. 1 . Hceninghaus, Monog. of Crania, 

 f. 6. 



ORBICULA, Lamarck. 



Testa cornea, orbicularis, subirregularis, insequivalvis, subcompressa ; 

 valvis, superiore patelliformi, inferiore planulata, fissura subcentrali 



* The species which is here figured from Sowerby's ' Genera of Shells,' has been named 

 Crania rostrata by M. Hceninghaus, upon the opinion that it is not the true Crania personata 

 of Lamarck, a question which we only regret that it is not in our power to decide. 



