PLEUROTOMAEIA.— Plate I. II. 



(Thes. pi. 490, 491.) 



Plate I. 



Deeply umbilicated, whorls slightly angular, slit above 

 middle. 



Fig. 



1, 2. RuMPHii, sp. 4, Schepman, 1879, Tydschr. d. Ned. 

 Dierk. vol. iv. p. 163, Mollucas, 170 x 190 mil., nearly 

 smooth. — Collection of the Zoological Gardens, Rot- 

 terdam. 



3, 4. Adansoniana, sp. 3, Crosse, 1861,Journ. Conchyl. vol. 

 ix. p. 163, pi. 5, f. 1, 2, and vol. xx. p. 204, pi. 1.— 

 Guadaloupe ; Barbadoes. — 74 x 82 mil. Strongly decus- 

 sated ; slit broad. — Collection of M. le Chevalier Crosse. 



Plate II. 

 Hollowed in middle, ivhorls not amgular, slit below middle. 



5, 6. QuoYANA, f. 5, 6, Fischer, 1856, Journ. Conch, vol. v. 



p. 165, f. 1-13. — Near the Island of Dominica, Gulf of 



Mexico ; Sea of Antilles. — 35 x 48 mil. The first 



described and smallest ; minute sculpture. — Collection 



of the late Mrs. De Burgh. 



7, 8. Betrichii, sp. 2, Hilgendorf, 1877, Sitzungsber. Ges. 

 Naturforsch. Freund, Berlin, p. 72. — Japan. — 82 x 

 83 mil. Large sculpture. — Coll. Hilgendorf. 



I have to acknowledge with thanks the kindness of Admiral 

 van Rees in sending me a full-sized painting in oil of 

 P. Rumphii ; of Dr. A. Miiller, of the Linnsean Natur- 

 historisches Institut., Berlin, for several publications, and of 

 Miss De Burgh for permission to draw from her specimen. 



T T 



