Smaller and more slender. 1 20 by .45; costae, 10; lower tooth. small; upper, absent; gray externally, pale bluish within. Found in a limited area near beach. Map 1, 3. Recent, but all dead. Plate 1. figs. 5 6. Not common, 50." Maynard and Clapp in Maynard (1920d:116).