159 



FAMILY TEREBRID^. 

 Gexus Terebra. 



SYNOPSIS OF THE SPECIES. 



Shell with a smooth band in front of suture, defined by a sulcus. 



1. T. platyspira. 

 ishell with a tuberculate or plicate band in front of suture, defined 



by a constriction. 



A double row of nodulations on posterior half of whorl. 



The rows of nodulations separated by a sculptured area. 



2. T. catenifera. 

 The rows of nodulations contiguous. 



3. T. suhcatenifera. 

 Transversely plicate on posterior whorls ; anterior ones 



smooth. 4. T. mitrellcpformis. 



AVhorls varicosely costated. 5. T. crassa. 



Costse bent, subnodulose. 6. T. yeniculata. 



Transversely plicate throughout. 



Narrowly cylindrical ; pullus large, sub-globose. 



7. T. mutica. 



Broadly pyramidal ; plicfe stout. 8. T. subspectabilis. 

 Narrowly pyramidal ; plicse slender ; pullus cylindric. 



11. T. additoides. 



Shell without an ante-sutural band on the anterior whorls. 

 Transversely striated or wrinkled. 



Posterior whorls flat ; spire regular. 



9. T. simiolex. 



Posterior Avhorls sub-angulated ; spire acuminate. 



10. T. angidosa. 

 Slenderly costated. 



Anterior Avhorls sloping to the posterior suture. 



11. T. additoides. 

 Whorls flat ; ribs obsolete on anterior whorls. 



12. T. leptosinra. 

 Whorls convex, coronated at the suture. 



13. T. convexiuscida. 



SPURIOUS SPECIES. 



Terebra scalaris, Tate, is transferred to Cerithiopsis. 



1. Terebra platyspira, Taie. Plate viii., fig. 12. 



Reference. — Southern Science Record, January, 1886, p. 6. 



Shell narrow-elongate, of many flat whorls of slow increase, 

 terminating in a relatively large papillary pullus of two turns ; 

 the first turn of the pullus subgiobose, with the tip reverted and 

 immersed, much broader than the next two or three whorls. 



