414 DR. GWYN JEFFREYS ON MOLLUSCA OF THE [Apr. 16, 



large muscular scar below the beak : inside smooth ami glossy, not 

 contracted behind, nor grooved like R. psittacea. L. 09, B. 0"75. 



'Porcupine' Exp., 1870; St. 3, 690 f. : Chops of the English 

 Channel. One perfect aud living specimen, besides two not quite 

 perfect valves and some fragments. 



The shape of the Sicilian fossil, for a specimen of which (see Plate 

 XXIII. fig. 6) I am indebted to Professor Seguenza, is rather more 

 broadly triangular, and is uniformly convex ; but it agrees with the 

 recent specimen above described in its peculiar sculpture, want of 

 flexuosity in the front margin, short beak, and small foramen. The 

 fibrous texture of the shell is much softer and looser than that of B. 

 psittacea}. Attached to the living specimen of B. sicula is a remark- 

 able species of Balanus or an allied genus, which will be elsewhere 

 noticed. 



** Hinge less. 

 Family I. Craniid^e. 

 Genus Crania. 



Crania anomala, Muller. 



Patella anomala, Mall. Zool. Dan. Prodr. p. 237. 



C. anomala, B. C. ii. p. 24, pi. i. f. 3 ; v. p. 165, pi. xix. f. 6. 



« Lightning ' Exp., St. 2, 1 70 f. ; 4, 530 f. ; 5, 189 f. (var. alba). 



' Porcupine ' Exp., 1869, St. 2, 808 f. ; 6, 90 f. ; 7, 159 f . ; 12, 

 670 f. ; 14, 173 f., on Oculina prolifera ; TheMinch, 1 70 f. ; 74 & 75, 

 203-250 f. ; 78, 290 f., with Platydia anomio'ides. 1870, Atlantic, 

 1, 567 f. ; 3, 690 f., upper valve coloured with reddish-brown streaks ; 

 24, 292 f. : Mediterranean, 45, 207 f. ; 58, 266 f. ; Adventure Bank, 

 92 f. 



Spitzbergen to the Mediterranean, Adriatic, and iEgean : 3-255 f. 

 Jamaica (Barrett, as C. personata, in coll. M 'Andrew); North Sea, 

 0-106 f. (Metzger). 



Some of the specimens procured by Dr. Carpenter in H.M.S. 

 ' Shearwater' off the coast of Tunis, in from 40 to 120 fathoms, are 

 unusually thick, especially at their edges, which are closely notched 

 inside ; and they belong to the variety which Seguenza has described 

 and figured as C. lamellosa from the Sicilian Pliocene beds. In two 

 or three of these ' Shearwater' specimens the hinder margin of the 

 upper valve is nearly straight ; and the posterior muscular scars 

 project somewhat beyond the sides, so as to give a hinge-like cha- 

 racter to that part of the valve. The interior of the upper valve in 

 one specimen is covered with crowded oblong tubercles, which are 

 arranged in the line of growth. The inside margin of the lower 

 valve is generally more or less raised, as I pointed out in ' British 

 Conchology,' vol. ii. p. 25. 



There are several synonyms, viz. : — Criopus Jimbriatus for the 

 animal or soft parts of this and other Brachiopods, and Anomia 



1 In if. psittacea the curved processes in the lower valve are rather long, ir- 

 regularly triangular and twisted ; the lamina is furnished underneath with five 

 or six slight obliquely transverse ridges, which form notches at the inside edge. 



