PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



EXPLANATION OF PLATE XXIV. 



SAN DIEGO SHELLS. 



Fig. 1. Lamellaria diegoensis Dall, profile ; p. 538. 



Fig. 2. Lamellaria diegoensis Dall, from above ; p. 538. 



Fig. 3. Lamellaria diegoensis Dall, from below; p. 538. 



Fig. 4. Milneria minima Dall, <?, magnified profile ; p. 549. 



Fig. 5. Milneria minima Dall, 9 > from below, sliowing marsupiam empty ; p. 549. 



Fig. 6. Milneria minima Dall, ^, from below, showing base without marsupium; 



p. 549. 

 Fig. 7. Milneria minima Dall, 9 , from below, showing marsupium covered by mantle 



tissues; p. 549. 

 Fig. 8. Thecalia eoncamerata (Chemn.) H. & A. Adams, from Cape of Good Hope; 



magnified view of interior of $ shell, showing completed marsupium in 



right valve ; p. 550. 



