Geographical Distribution of the Terebratulse. 185 



dorsal valve is flat and irregularly indented, denoting a close 

 attachment to the body to which the pedicle is affixed. 



43. 7>?T6r«/M/a (Morrma) /Mwi/em, Philippi, Enum. Moll. Sicil. 

 i. p. 97, pL 6, f. 16 a-jf. 



Orthis lunifera, Philippi. 

 Morrisia lunifera. Gray. 



Hab. Mediterranean ; Philippi. 



A delicate hyaline species, of a more triangular form than 

 either of the preceding two, puckered with indentations at the 

 margin. 



Subgenus 11. Argiope, Deslongchamps. 



Apophysis a loop sweeping round the valve on either side, supported 

 in front by from one to three short marginal septa. 



44. Terebratula [Argiope) decollata, Chemnitz, Conch. Cab. viii. 

 p. 96, pi. 78. f. 705 a, h,c,d; Conch. Icon. pi. 10. f. 43 a, b. 



Anomia decollata, Chemnitz. 



detruncata, Gmelin. 



Terebratula decollata, Deshayes. 



detruncata, De Blainville. 



Megathyris detruncata, D'Oi-bigny. 

 Terebratula aperta, De Blainville. 



dimidiata, Scacchi. 



cardita, Risso. 



urna-antiqua, Risso. 



Orthis detruncata, Philippi. 

 Argiope detruncata, Deslongchamps. 

 decollata, Davidson. 



Hab. Mediterranean (affixed to corals at depths of from 50 to 

 100 fathoms). 



The loop is in this well-known species supported in front by 

 three marginal septa. 



45. Terebratula {Argiope) cuneata, Risso, Eur. Merid. pi. 4. 

 f. 179; Conch. Icon. pi. 10. f. 44. 



Anomia Peru, Muhlfelilt. 

 Orthis Pera, Philip|)i. 

 Terebratula Holdaniana, Risso. 

 Argiope cuneata, Davidson. 



Hab. IMediterrauean (at depths of from 30 to 70 fathoms) ; 

 Canaries. 



A narrower form than the preceding species, with the beak 

 more tumidly produced, and the hinge-avea consequently less 

 abruptly truncated. The loop rests upon only one marginal 

 septum. 



Ann. 6f Mag, N. Hist. Ser. 3. Vol. vii. 13 



