\1 



The Nautilus. 



Vol. XXIV. AUGUST, 1910. No. 4 



PURPURA CRISPATA AHD SAXICOLA. 



BY K. G. VANATTA. 



In the following notes I follow Dr. W. H. Dall in using the 

 generic term Thais in place of the familiar name Purpura. 

 Thais plipata Mart. 



The species usually called Purpura crispaln from the west coast 

 of America was first named Bitccinum plicatnm Martyn 1789. The 

 figures in Martyn's Univ. Conchology, pi. 44, represent the large 

 foliated form, one being brown with white shoulder, and the other 

 all brown. Buccinum lamellosum Gmel. 1790, and Buccinum com- 

 positum (Chem.) Desh. 1843, were based on the same figures or 

 copies of them. Polyplex nigosus Perry 1811, is also the brown 

 form with white shoulder. Buccinum crispatum Dillw. 1817, and 

 Murex ferrugineus Esch. 1829, are entirely brown. Murex lactuca 

 Esch. 1829 (not Bolt.), is the while form of this species. 



T. p. VAR. septp:ntrionalis Rve., Conch. Icon. (Purpura") III, 

 pi. 10, f. 50, is a name for the rather high spired forms without the 

 longitudinal foliation. 



TuAis LIMA Mart. 1789. 



Buccinum lima Martyn, Univ. Conch., pi. 46, has many spiral 

 costae. It has the following synonyms : Purpura conaliculata Desh. 

 1839, Purpura attenuala Rve. 1846, Purpura decemcostata Midd. 

 1849, Purpura analoga Fbs. 1850 and Purpura beringiana Midd. 

 1851; the latter name is for specimens with the costae more spaced. 



Thais emarginata Desh. 1839. 



Purpura emarginata Desh, Bev. Zool. 1839, p. 360, Las usually 



