NATURAL SCIENCES OF PHILADELPHIA. 107 



Cryptopora, Jeffreys, Nature, p. 136. Dec. 2, 18G9. (No 



descr.) 

 Atretia, Jeffreys, Proc. Roy. See. 121, p. 421, par. 36. (No 

 desci-iption.) 

 1. DiMERELLA GNOMON, Jeffreys, MSS. 



(Jeffreys, 1. c. ad ref. descr. null. Gryptopora gnomon et 

 Atretia gnomon.) Dall, L c. vii. p. tO. 1871. 



Deep Sea, west of Ireland. 



Order LYOPOMATA, Owen. 



Lyopomata, Owen, Enc. Brit. Ed. viii. vol. xv. Article Mollusca, 



p. 339. 1858 Dall, Bull. Mus. Comp. Zool. iii. No. 1, p. 



25. 1871. 

 Fleuropygia, Bronn, Tliierr. iii. 1st Abth. p. 301. 1862. 

 Inarticulata, Huxlej^, Lect. Class. 1864. Intr. Class. An. 



p. 116. 1869. 

 BracMopoda^ valves libres^ Desk. Lamk. An. s. Yert. 2d 



Ed. vii. p. 309. 1836. 

 Palliohranchiata, testa acardis, Van der Hoeven,, Handb. 



der Zool. p. 692. 1850. 



Family CRANIIDuE, Gray. 



Graniadae, Gray, B. M. Cat. p. 155. 1840. Dav. Int. Class. Brit. 



Brach. p. 51. 1851. Woodward, Man. Rec. and Foss- 



Sliells, p. 235. 1854. 

 Gra7iidse^ Owen, Anat. Inv. Index, p. 683. 1853. 

 Graniidee^ H. & A. Ad. Gen. Rec. Moll. ii. p. 583. 1858. Jeffrey's, 



Brit. Conch, ii. p. 24. 1863. Dall, Bull. Mus. Comp. 



Zool. iii. No. 1, p. 25. 1871. (Full synonymy.) 



Genus CBANIA, Retzius. 



Grania^ Retzius, Schrift. Berl. Ges. Naturf. Freunde, Bd. ii. p. 72. 

 1781. Type G. ci-aniolaris^ Lin. sp. Syst. Nat. xii. i. pi. 

 ii. p. 1150. 1767. = G. hrattenshurgensis., Retz. -f G. 

 numurulus, Lam. Dall, Bull. Mus. Comp. Zool. vol. iii. 

 No. 1, p. 27. 1871. (Full synonymy.) 

 Cranicella, Raf. 1815, -\- Orbicula, Cuv. 1798, + Orhicula 

 (pars) Lam. 1799, + Discina, Turton (sp.), 1822, + 

 Anomia (sp.), Lin. 1760, -|- Patella (sp.), Muller, 1766, 

 -|- Siphonaria (sp.), Quenstedt, 1852, -|- Griopus, Gray, 



