(97) Galveston Well Fossils i5 



This is a long slender form with a thin shell faintly striated spi- 

 rally at base. It differs from oxytata Bush from our eastern coast 

 by its greater length, narrower 'form, and thinner shell. It may 

 be only a variety of cylindrica Gabb, a West Indian Miocene form 

 even longer than this, but Gabb's name is preoccupied by Carpen- 

 ter's cylindi'ica from the western coast. 



Range in depth. — From 2,552 to 2,650 feet. 



TEREBRA. 



Terebra concava. 



Syn. Turritella concava Say, Jr. Phila. Ac. Nat Sci., vol. v, 

 1826, p. 207. 

 Terebra concava Har., 4tli Ann. Rep. p. 121. 



Range in depth. — From 2,552 to 2,920 feet. 



Terebra dislocata . PI- 3> ^a- 3- 



Syn. Cerithium dislocattun Say, Jr. Phila. Ac. Nat. Sci., vol- 



2, 1822, p. 235. 

 Range in depth. - From 2,158 to 2.920 feet. 



Terebra langdoni. Ph 3' ^S- 4- 



Syn. Terebra langdoni Ball, Proc. U. S. N. M., v. 18, p. 45. 

 Terebra, Chipola form, Harris, 4th Ann. Rep., p. 121. 



Ball's description.— Shell small, slender, of 13 whorls besides 

 the nucleus which is small, conical and of three whorls ; sculpture 

 reticulated transversely by 16 low, narrow, rounded, slightly fiex- 

 uous ribs with wider interspaces, the posterior ends of the ribs 

 not cut off by the deep sulcus which defines the sutural band in 

 front ; transverse sculpture of this sulcus visible between the ribs 

 and four flattish spirals, separated by narrow grooves, betxyeen 

 the sulcus and the next suture, and seven or eight narrow spirals 

 on the base ; aperture longer than wide ; pillar simple, smooth, 

 canal rather long, twisted and recurved. I^ength 20, maximum 

 diameter 4 mm. 



As a rule the Texan forms are somewhat stouter than those 

 from Florida and the number of plicae is about eighteen. 



Type of the species. — U.S.Nat. Museum. 

 Specimen figured. — Texas State Museum. 

 Range in depth. - From 2,158 to 2,920 feet. 



