CE11ITHI]3EA. 



PUtte. Species. 



albo-nodosa I. 1 



;iiubigua 11. 9 



hicariuata IV. 27 



Bomlxiyana IV. 34 



costata 11. 10 



Charbonnieri II. 12 



cornea III. 21 



decoUata II. H 



Fortunei III. 15 



Hanleyana III. 16 



iostoma III. 20 



Kieneri I. (J 



Lafondii I. 2 



Montagnei IV. 26 



Mazatlanica I. 8 



Species. Plate 



raamiUata H ■ 25 



Morchii II. 18 



obtusa I. 4 



ornata IV. 22 



pulchva IV. 29 



qiiadrata I. •*> 



Rhizoporarum II. 13 



Rissoidea II. H 



Sinensis III. 17 



sacrata I- ^ 



salmaeida IV. 23 



subcarinata IV. 28 



tenuis I. 3 



uiiicariiiatum II. 12 



varicosa Ill- 19 



