DIJNDRY GASTEEOPODA. 13 



KATICA. 



We have numerous specimens, wliich we are disposed to group 

 under four species. In the state of synonomy it is uncertain 

 what names these should bear ; the present attempt to characterise 

 these without an opportunity of examining foreign types 

 especially is put forward merely as an attempt. 



With respect to the genus, it has long been suggested by 

 Herbert, Deslongchamps, Laube, &c., that these elongate forms 

 should be placed apart. "We therefore follow Morris and Lycett 

 in placing them under Euspira Ag. It will be observed that all 

 our forms have a canal or flat ledge at the suture, and most have 

 a punctate shell. This latter character alone should remove 

 them from IS'atica, and we should be disposed either to limit 

 Euspira to those species with a punctate test, or to create a new 

 genus for them; perhaps the word Naticapora might do for 

 such. 



EUSPIEA BAJOCENSIS, D'Orb. PL 1, figs. 2 and 4. 



1847 N.Bajocensis, D'Orb., Prodr. L, p 264. 



1850 D'Orb., Pal. fr. Terr. Jur. 2 Gast, 



pi. 289, f. 1, 3, p. 189. 

 Syn. 1850 K. Pictaviensis, D'Orb., Pal. fr. Terr. Jur. 2 Gast. 



pi. 289, f. 8—10, p. 191. 

 1866 1^. Crythea, Laube, Gast. d. br. Jura, v. Balin. 



pi. 1, fig. 6. 

 Length 34 mm. Breadth 24 mm. 



We have so many intermediate forms that we feel obliged to 

 group together shells which apparently differ so much in shape 

 as figs. 2 and 4 of our plate. The angle of the spire varies between 

 60 and 70 degrees. The test is regularly punctate. The punctae are 

 set in regular rows at equal distances, but are by no means always 

 preserved — for instance, they do not happen to be seen in the 

 individual figured, (fig. 2) though well shown on another 

 evidently the same size and shape, as well as in our fig 4, and 



