82 OLTVA. 



Typical examples are so different in form from 0. araneosa, 

 while the painting is more nebulous, that they would readily be 

 distinguished as a species, but intermediate specimens are not 

 wanting. This form also has several synonyms : 0. Timor en sis, 

 Duclos (figs. 15, 76), said to come from Timor — which is evidently 

 an erroneous habitat; one of these specimens is dark colored, 

 resembling 0. Cumingii, Reeve (fig. 77), which must also be 

 considered a synonym. 0. Marise, Ducros (tig. 78), is a small 

 specimen apparently, of this species ; Kuster figures a larger 

 shell under the same name (PI. 21, fig. 91); 0. o&esma, Duclos 

 (fig. 79 ), 0. porcea, Marrat (fig. 80) and 0. graphica^ Marr. (fig. 81), 

 are also to be placed here ; and I am inclined to include 0. truncata, 

 Marr. fig. 82), although it is said to come from the Cape of Good 

 Hope. I believe this habitat to be erroneous ; moreover a 

 specimen received from Mr. Marrat is undoubtedly a young 

 Juliettse. 



Yar. POLPASTA, Duclos. Fig. 83. 



Light olive, the reticulations broken up into nebulous spots 

 and occasional arrow-head markings ; the fasciculations at the 

 sutures spread from centres at regular distances, between which 

 the shell is colored yellowish white. Length, l*25-r75 inches. 



The form is much like var. Juliettse, from which it is to be 

 distinguished by its smaller size, darker color, and especially 

 by its *gay alternation of white spaces and fan-like chocolate 

 fasciculations at the sutures — which are none of them stable 

 characters. 



0. ANGULATA, Lam. PI. 29, fig. 84. 



Ovate, ventricose, very thick, angularly swollen above the 

 middle ; ash-white mottled and spotted with olive and gray, 

 and with occasional* chestnut transverse streaks and zigzag 

 markings ; lip and columella flesh-pink. Length, 2-5-3'5 inches. 



Panama to Ouaymas. 



The young shell is not angulated, and approximates to the 

 last species in form, and somewhat in exterior coloring, but 

 may be distinguished at once by the color of the columella and 

 interior. 

 0. SGRIPTA, Lam. PI. 30, fig. 85. 



Cylindrically oblong, spire rather short, columellar plaits 



