1881.] 'lightning' AND 'porcupine' EXPEDITIONS. 951 



P. 576. Leda messanensis. Bay of Biscay (' Travailleur ' Exp.), 



367-1011 fms.; G. Mexico ('Blake' Exp.), 100-1002 



fins. 

 „ Leda pustulosa. Bay of Biscay ('Travailleur' Exp.), 



1011 fms. 

 „ Ledafriffida. New England, 3G5 fms. Fossil. Mio- 

 cene: Calabria (iSe^.). Post-tertiary: Glasgow. 

 P. 577. Leda tenuis. Bay of Biscay ('Travailleur' Exp.), 045 fms. 

 P. 578. Leda striolata. Bay of Biscay (' Travailleur ' Exp.), 733 



fms. 

 „ Leda intermedia. Barentz Sea, 128 fms. 

 „ Leda lucida. North Sea, 100-320 fms. ; Bay of Biscay 



('Travailleur' Exp.), 552-1011 fms. 

 „ Leda pusio, var. latior. Bay of Biscay (' Travailleur ' 



Exp.), 552-1011 fms. ; G. Mexico, G38 fms. 

 p. 579. Ledasericea. Bay of Biscay ('Travailleur' Exp.), 1011 fms. 

 „ Ledajeffreysi. Bay of Biscay ('Travailleur' Exp.), 367- 



1011 fms; Palermo; off Ascension ('Challenger' Exp.). 



Var. quadrangidaris, Dall. G. Mexico ('Blake' Exp.), 



1568 fms. 

 P. 580. Leda micrometrica. Fossil. Pliocene : Calabria. 



„ Leda expansa. Bay of Biscay (' Travailleur ' Exp.), 645 



fms. ; New England ?, southern coast. 

 „ Leda pusilla. Off Malta ; 310 fms. 

 P. 581. Nucula tenuis. Barentz Sea, 128 fms.; G. Mexico (' Blake' 



Exp.), 1 75-450 fms. 

 „ Nucula cegeensis. Bay of Biscay ('Travailleur' Exp.), 



367-645 fms. Fossil. Post-tertiary: Calabria. 

 P. 582. Nucula corhuldides. Bay of Biscay ('Travailleur' Exp.), 



367-1011 fms. 

 „ Nucula delphinodonta. New England, southern coast. Fos- 

 sil. Add Calabria. 

 „ Numla tumidula. Bay of Biscay ('Travailleur' Exp.), 



552-733 fms.; North Sea, 100-365 fms. 

 P. 583. Nucula reticulata. I find that this specific uame had been 



preoccupied by Mr. Hinds for another species from the 



Philippine Isles (P. Z. S. 1843, p. 100); and I would 



therefore substitute that of cancellata for my species. 

 „ Nucula sti'iatissima. Bay of Biscay (' Travailleur ' Exp.), 



645 fms. 

 „ Nucida sulcata. Bay of Biscay ('Travailleur' Exp.), 183- 



236 fms.; off Marseilles ('Travailleur' Exp., 1881), 



295 fms. 

 „ Nucida nucleus. 'Lightning' Exp., St. 5. Jersey, living 



between tide-marks. A^ar. radiata. Coast of Jutland. 

 P. 584. Pectunculus nummarius. Fossil. Post-tertiary : Calabria. 

 P. 585. Limopsis aurita. G. Mexico, 30-447 fms. ; off Cuba, 450 



fms. N. Spain and off Marseilles ('Travailleur' Exp., 



18S1), 295 fms. Fossil. Post-tertiary : Calabria. Syn. 



Pectunculus corrugatus, Calcara. 



