34 BULLETIN OF THE 



1855. — Gosse, Marine Zool., II, p. 80, fig. 120, 1856. — Davidson, 

 Mem. Lin. Soc. Norm., X, p. 229, pi. xiii, figs. 14 - 1G, 24, 32, 33, 35, 3G, 



1856. — H. and A. Adams, Gen. Rec. Moll., II, p. 583; III, pi. exxxii, 

 figs. 3, 3 a, 3 b, 1858. — Suess, Wohns., I, p. 39 (221), 1859. — Chenu, 

 Man. Conchyl., II, p. 230, figs. 1178, 1862. — Reeve, Conch. Icon. Mon. 

 Crania, pi. i, fig. 4, 1862. — Jeffreys, Brit. Conch., II, p. 24, pi. i, fig. 

 3, 1863 ; V, p. 165, pi. xix, fig. 6, 1869 



Hah. North European seas. 



B. var. turbinuta Poll 



Anomia turbinuta Poli, Test. Utrius. Siciliae, II, p. 189, 261, t. 30, fig. 15, 



1795, in synonymy. — Dillwyn, Cat., I, p. 286, No. 2, 1817, in part 



(+ anomala, part). 

 Anomia craniolar is (part) Gmelin, Syst. Nat., p. 3340, 1792. — Dillwyn, Cat , 



I, p. 285, No. 1, 1817 (-f- craniolaris part). 

 Criopus fimbriatus (part) Poli, Test. Utrius. Sic., II, p. 189, 1795. "Hab. in 



Anomia turbinuta" Poli, 1. c. (animal). 

 Criopodermu turbinatum Poli, II, p. 261, No. 1, 1795 (shell). 

 Patella anomala Dillwyn, Cat., I, p. 286, in syn. 



Orbicula turbinuta Lamarck, Hist. An. s. Vert., Ed. II, VII, p. 317, 1836. 

 Crania persona ta Blainville, Diet. Set. Nat., XI, p. 312 ; XXXII, p. 304, pi. 



lxxxiv, fig. 2, Cah. xv, 1818 (not of Lam., Hist., Ed. II, VII, p. 299, note, 



fide Deshayes (?). Cf. previous note, p. 33). 

 Crania personata Deshayes, Encyc. Method., II, C, p. 16, 1830; partly; 



(-4- anomala part, per citation of Retz.). 

 Crania rinrjens Hceninghaus, Mon. Crania, p. 3, No. 2, fig. 2. — Deshayes, 



Encyc. Me'th., II, p. 16,No. 3, 1830. — Lamarck, Hist. An. s. Vert., Ed. II, 



VII, p. 302, 1836.— Sby., Thes., I, p. 367, pi. lxxiii, figs. 10, 11,1847.— 



Suess, Wohns., I, p. 41 (223), 1859. 

 Crania rostrata Deshayes, Hist. An. s. Vert., Ed. II, VII, p. 302, No. 7, 



1836 ; partly (+ anomala and rostrata part). 

 Not Crania rostrata ILexinghaus, Mon. Cram, p. 3, No. 3, fig. 3, 1828. — Rve., 



Icon., pi. 1, fig. 3, 1862. 

 Hab. Mediterranean. 



C. var. alba Jeffreys. 



Crania anomala var. alba Jeffreys, Brit. Conch., V, p. 165, 1869. 

 Hab. Shetland, Hebrides. 



The shell of Crania anomala is rounded, with a slight tendency toward 

 a squarish form. The posterior border of the valves is nearly straight, 

 and Barrett, who examined living specimens, asserts that the two valves 

 open and shut on this edge, like the sides of a hinge. Upper valve sub- 

 conical or depressed, with the apex not prominent and rather posterior. 

 External surface smooth in normal specimens, or slightly marked with 

 concentric lines of growth. Internally rather smooth, with coarse and 

 conspicuous punctation. The margin of the valves is rough, and pre- 



