122 THE NAUTILUS. 



from the typical spicata, it, however, prevents the use of' Lamarck's 

 name of litterata. O. graphica and porcea Mart, are only shorter and 

 more ovate forms. 



Among the variations of this species is an interesting form from 

 San Ignacio Lagoon, Lower California, collected by Mr. Henry 

 Hemphill. It is noticeably narrower with a much higher spire and 

 the periphery slightly angulate, the reddish reticulations are obscured 

 by a milky-white layer. Represented in the Ford collection by six 

 specimens bearing the manuscript name of hemphilli. The variety 

 pindarina Duel, (punctata Marr.) is the common, slightly angulate 

 form, quite regularly marked with dark-brown or white, obsoletely 

 marked with light-brown, frequently entirely white, fascicle reddish. 

 Specimens in which the markings are obscured by a dark-brown 

 layer constitute the fuscata Marr.; similar specimens having the 

 form of graphica are ustulata Lam. Brown examples of the typical 

 spicata might bear the name perfecta. Specimens abnormally angu- 

 lated at the periphery constitute the subangulata Phil. The variety 

 polpasta Duel, is the short broad form so densely marked as to form 

 an olive-green ground, spotted with dark-brown, and with white tri- 

 angles below the suture. The variety cumingii Reeve is yellow, 

 banded or streaked with brown, it often suggests 0. peruviann 

 Lam. 



OLIVA PEBUVIANA Lamarck. 



This species varies greatly in color, but lacks the finely reticulated 

 patterns of spicata. The typical form is spotted; those with irregular 

 longitudinal streaks of brown are the fulgurata Martens (non Ads. & 

 Rev.). The light-colored specimens might be called livida and the 

 dark-chesnut-colored form castanea Ford, manuscript. 



OLIVA JULIETTE DUCLOS. 



This is apparently a good species, the thickening of the outer lip 

 suggests a closer relationship to 0. incrassata Sol. than to spicata, 

 although the young of the three species closely resemble each other. 



OLIVA INCRASSATA (Solander). 



Valuta incrassata Sol., Portland Cat., p. 171, 1786. 

 Oliva angulata Lam., Ann. du Mus., XVI, p. 310, 1810. 

 Solander and Lamarck both refer to the same figures by Martini 

 (Conch. Cab., II, tab. 47, figs. 499, 500). The 0. timorea Duel. 



