PLATE I. 



Fig. 



1 a — c. Entomoconchus Scouleri, M'Coy, var. ovalis, nov. A cast from Meath, Ireland. 



(Page 49.) 



a, Side-view of the left valve ; b, hinder view ; c, back-view. Magnified 

 4 diameters. 



2 a — e. Entomoconchus Scouleri. Small female (?) shell. Prom Settle, Yorkshire. 



(Page 50.) 



a, Profile, showing right valve ; b, dorsal view ; c, posterior ; d, anterior ; 

 e, ventral. Magnified 4 diameters. 



3 a — d. Entomoconchus Scouleri. Cast with portion of the shell. Prom Vise, Belgium. 



(Page 50.) 



a, Profile, showing left valve ; b, hinder end of the valve ; c, ventral edge ; 

 magnified 2^ diameters, d, Muscle-spot as shown on the cast ; magnified 

 12 diameters. 



4 <7 — d. Entomoconchus Scouleri. Large specimen from BoUand, Yorkshire. (Page 51). 



a, Profile, showing right valve ; b, anterior ; c, ventral ; magnified 2^ 

 diameters, d. Muscle-spot ; magnified 5 diameters. 



5 a — d. Entomoconchus Scouleri. Large specimen from Bolland. (Page 51.) 



a. Profile, showing left valve ; b, anterior c, ventral ; magnified 2^ dia- 

 meters, d. Muscle-spot ; magnified 5 diameters. 



6 a — c. Entomoconchus Scouleri. Small male (?) shell. From Bolland. (Page 51.) 



a, Profile, showing right valve ; b, front-view ; c, ventral. Magnified 1\ 

 diameters. 



7 a — c. Entomoconchus orbicularis, sp. nov. From Little Island, Cork. (Page 52.) 



a, Profile, showing right valve ; b, front-view ; e, dorsal view. Magnified 

 2^ diameters. 



