238 



American Seashells 



Nassarms tegnla Reeve 



San Francisco to Lower California. 



Western Mud Nassa 



Plate 2 on 



% inch in length, moderately heavy, with a heavy, whitish or brown- 

 stained parietal callus. Body whorl smoothish around the middle, but with 

 a spiral row of fairly large nodes below the suture. In the spire, the nodes 

 are usually divided in two. Base of body whorl with a few weak, spiral 

 threads. Outer lip thick. Color olive-gray to brownish, often with a narrow, 

 whitish or purplish, spiral band. A common mud-flat species. 



FiciURE 53. Nassa Mud Snails. ATLANTIC: a, Nassarws miibigiiiis Pulteney; b, 



N. amhigims form co7iseimis Rav.; c, N. acutus Say. PACIFIC: d, A^. vien'diciis 



Gould; e, N. perpbigiiis Hinds; f, N. iiisciilpws Cpr. All X3. 



