EXPLANATION OF PLATE XXIX. 



NUCULA I'EKCH ASSA Coil., p- 36() 



I. IntcriKil cast of a right \'ah'c. 



Cliffi^'ocJ cliiy: Cliltw.unl Point, iinj). 

 2-3. \'k \\ s ("tf twc intcina) c.'t^ts, 



Mcrihanli'illc clay-)iiarl; /..cimla, 1103). 



4. Internal ca^l nf a rigiit val\c. 



U'ltodbiiry clay: LuriUurd. (102). 



5. A rrglit \:il\'c witli lliu -liell itn,-eiAc<j. 



Marslialllnicii clay-iimrl ; near Si^'Cdcsbnni, (IJ/). 



Nucui.A uHiTi'iEi.ni n. xp., p. 371 



6-9. Internal casts nf sc\'eral vah-cs. 



U'cii'niali saiul ; near Marlboro, (130). 

 10, Inteiaial cast iif a right \'alvc. 



U'liioiuiIi sanil : near Crirwfords Corner, (126'). 

 11-12. Internal casts uf a riglit ami a left \alve. 

 Woddbiiry elay: I.oriUard, [102). 



Leha chmpkessifkoxs ( \\'hithel(I ) p. 37:? 



13~'4.. ij-l'J- Views of lu'o internal casts, a left and a right \alve 

 na.tra'al size and enlarged two diameters. 

 Woodbury cUiy; LonUard, {102). 

 17. Internal cast of a. right valve' preibahly lielonging t'l this 

 species. 



Merehanli'dle eUiy-uiarl ; near Jainesbiirg. 1130). 



Leii.v ir.\ki.i'.uK(jE\sis n. sp p. 374 



1S-19. \'ie\vs cif two internal casts, a right ;ind a left valve. 

 20-21. The same, (x2). 



ll'enonah sand: r.ear Marlboro, {130). 

 22 Internal cast i;if a left waive. 

 23. The same, ( x2) . 



U'enonah sand: near Crazejiirds Corner, 1126'). 



LeDA CEIEFWOOIIENSIS n. sp p. 377 



24-25. Right sule anil dorsal aspect eif the I) pe ^jiecimen. a \ cry 

 picrfect niternal cast. 



Cliffieood elay: Cliffwood I'olnl, Uoj;). 



Leda protext.v (',alili p. 375 



20. \'iew of the type specimen, partially restored. ( .Vfler 

 Wdnttield. I 



XirvesiiiL- niai'l. 



Leu.\ I'lNXAi-iiKMis (iahh p. 373 



27. View of type specimen, (X3). ( .-Vfter Wdntheld. ) 

 U'oodluuy elay: I laddonlield . ( h\'3). 



Lep.\ i.;.U'.L-.,\NA ( \\'lnitield ) p. 37S 



2><. View of a small inili\adnal identified hy A\"liitheld. (After 

 Whithel.l.) 

 29-30. Two \iex\s of a larger indi\-idnal identified liy Whitfield. 

 (After Wdiitfield ) 



Na'L'esuiL' mail. 



Leiia tintonexsis n, sp p. 379 



31-32. A'iews of the two t>4ie sjiecmiens. 

 33-34. The same, ( x2). 



Union beds: Beers Hill Ciil, ^i2q''). 

 <J3« 



