58 TRITIA. 



X. KoiHiANA, Duukcr. l'\. IT. lig. 384. 



Velluwisli white, varieo;ated with chestnut. Length, 3-4 mill. 



Table Boy, So. Africa. 

 Another immature and tloubtful species. 



N. PLICATKLLA. A. A(L PI. 17 , fig. 335. 



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



Wiillwich Bail, So. Africa. 

 Very closely allied to the European A'. reHculata. 



■* - "••" Atlaiitic Ocean and Mediterranean Sea. 

 X. CLATURATA, Born. 1*1. IT, figs. 330-339. 



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

 whitish, irregularl}' yellow-banded in the middle; a deep sidcus 

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



Mediterrancaii Sea ; Madeira; Canaries. 



Seldom found living, but extensively distributed as a miocene 

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

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

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

 is that which 1 have adopted, and it has the advantage of being- 

 binomial, wliilst the later and generally adopted name, N. 

 limnfa, ('hemnitz, is only a portion of the phrase given in that 

 work. X. prisnintica, Brocchi (lig. 337), and A^. rle.gans, Dujar- 

 din are synonyms among the fossil specimens. Mr. Marrat 

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

 identical witii this species. X. .<ca1iiri J'nrmif^. Val. (fig. 339), is 

 not adult. 



N. RETici-j.ATA. Linn. PI. IS. figs. ."UO-o+.t. 



Yellowish white, light chestnut or chocolate-color; sculpture 

 varying considerably, liut the longitudinal ribs are usually the 

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

 sionally the suture is beaded so as to resemf)le N. moni/e, 



Kiener Lenyth, 'To-PSo inch. 



K>i rope, frail) Norway to the Mediternnican. 



Fossil, from the miocene throughout Europe. 



Jeffreys * says : At the recess of each tide this rnollusk 



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



* Brit. Conch., iv, :148. 



