58 TRITIA. 



X. KociiiANA. Dunkcr. PI. 17, fig. 334. 



Yellowish white, variegated with chestnut. Length, 3-4 mill. 



T tilde />V///, SV>. Afi'if.ti. 

 Another immature and doubtful species. 



N. PLICATELLA, A. Afl. PL 17, fig. 335. 



Yellowish, stained with light brown or ash. Length, 1 inch. 



Wallwich Bay, So. Africa. ^ 

 Very closely allied to the European .V. reJiculnta. 



* * '- Atlantic Ocean and Mediterranean SV^. 

 N. CLATIIRATA, Born. PI. 17, figs. 33(5-339. 



Shell turreted, rather thin, suture flatly, narrowly channeled, 

 whitish, irregularly yellow-banded in the middle; a deep sulous 

 at the base of the body-whorl. Length. '9-1 '25 inch. 



Mediterranean Xea ; M<nlcira ; Canar 



Seldom found living, but extensively distributed as a mioccnc 

 and pliocene fossil. It is a very variable form, and Weinkautf 

 even suspects that X. ntifla, Lamarck, will prove to be a variety 

 which is not unlikely. The oldest name used for the species 

 is that which I have adopted, and it has the advantage of being 

 binomial, whilst the later and generally adopted name. ,V. 

 limata. Chemnitz, is only a portion of the phrase given in that 

 work. N*pri#matica, Brocchi (fig. 337), and X. defiant. Dujar- 

 din are synonyms among the fossil specimens. Mr. Marrat 

 figures for N. turrita, A. Ad. (fig. 338), a shell which is certainly 

 identical with this species. X. Hcalttriformix, Val. (fig. 889), is 



not adult. 



i 



N. RETICULATA, Linn. PL 18, (igs. 840-845. 



Yellowish white, light chestnut or chocolate-color ; sculpture 

 varying considerably, but the longitudinal ribs arc usually the 

 most prominent, flexuous, distant, or numerous and close: occa- 

 sionally the suture is beaded so as to resemble A', monile. 

 Kiener Length, '75-l'25 inch. 



Kit-rope, from Norway to the Med-itri'r(irn>(i.n. 



Fossil, from the miocene throughout Europe. 



Jeffreys * says : At .the recess of each tide this mollusk 

 buries itself in the sand in a slanting position, its lurking-place 



* Brit. Conch., iv, 848. 



