The Nautilus. Vol. XXXI, No. 2, October 1917 / A Quarterly Journal Devoted to the Interests of Conchologists

by Various

1. Fusconaia barnesiana (Lea) 1838.

U. barnesianus Lea, ’38. U. meredithi Lea, ’58. U. pudicus Lea, ’60. U. Lyoni Lea, ’65. U. tellicoensis Lea, ’72. U. lenticularis Lea, ’72.

As the normal (most abundant) forms we may regard U. meredithi, pudicus and lenticularis, which differ from each other only in the development of the rays (topotypes examined). U. barnesianus is a slightly more elongated individual, with poorly developed rays. U. tellicoensis (topotypes examined) is a lenticularis slightly more swollen; and U. Lyoni forms the transition toward var. tumescens, having a little more elevated beaks, greater obesity, and rather distinct rays.