( 49 ) Ci,AiBORNE Fossils 49 



Meretrix cornelli, nov. sp. PI. i, fig. 5. 



The specimen herewith figured is the second of the kind known 

 to the writer; the first belongs to the U. S. National Museum and 

 and was collected by I,. C. Johnson formerly of the U. S. Geol. 

 Survey. The species is characterized by its large size (natural in 

 the figure), its rhomboidal form, — the obtuse angles at beak and 

 base, the acute at either extremity, — the smooth exterior with 

 lines only about the margins, and the plain V shaped pallial sinus. 



Type. — Harris's collection. 



CANCELLARIA 



Cancellaria priama , nov. sp. PI. i, fig. 2. 



This beautiful specimen (enlarged about four diameters in the 

 figure) was collected by the author for the Texas State Museum 

 but was broken to pieces before reaching its destination. Fortu- 

 nately a camera lucida drawing had been made of it while entire 

 and the same is herewith reproduced. The cancellation of the ex- 

 terior is distinct as represented, though at the junction of trans- 

 verse and vertical lines, especially towards the shoulder there 

 should be slightly more prominent nodules. The columellar plaits, 

 well shown in the figure are very peculiar for the genus. 



CARICELLA 



Caricella daibornensis Harris. PI. i, fig. 3. 



C. daibornensis Har., Dana's Manual of Geology, 4th ed., 1895, 

 p. 897, fig. 1489. 



This species is distinguished at once from the other members of 

 the genus by its short, stout form and the straightness of the sides 

 of the body whorl, i. e. , from shoulder to tip of columella. On 

 the latter there are four folds decreasing in strength from above 

 downwards; the lowest is but a swelling on the columella, extend- 

 ing some distance up and down as shown by the figure. 



Type. — Texas State Museum. 



A MA UROPSIS 



Amatcropsis perovata Con. PI. i, fig. 4. 



Ampidlariaf perovata Con., Proc. Ac. Nat. Sci., 1846, p. 21, 



pi. I, fig. 16. 

 See also p. 34 of this Bulletin. 



Conrad's specimen and figure of this species are very imperfect. 

 The shell substance is very thin and fragile and hence even our 

 specimen, though perfect when collected, has lost slight fragments 



