THE NAUTILUS. 31 



283. Zonitoides arboreus (Say). Mt. Pleasant, Texas, to Mena, 

 Ark. 



291. Zon. laevinsculus (Sterki). One in the Red River bottoms in 

 1899. 



297. Gastrodonta demissa (Binn.). Morris Ferry to Mena. 



297a. G. demissa Brittsi (Pils.). Ultima Tliule and Mena. At 

 the latter place in stone piles in the creek bottoms I found a large 

 form. The largest measured 10 mm., and I supposed at the time I 

 had run upon acerra. 



297b. G. dem. lamellata (Pils). From Morris Ferry to Mena. 

 This was generally found under the logs and very often in company 

 with demissa. The largest of both measured about the same, 8 and 

 9 mm. diameter. 



338. Pyramidida alternata (Say). From Rocky Comfort to Mena. 

 All rather strongly ribbed and dark in color. 



367. Succinea avara Say. At Mt. Pleasant, Texas, and Cove, Ark. 



As space is valuable in this journal, and my search at these points 

 was far from thorough, I will merely give a list of species found at 

 Hardy and Little Rock, Ark., and Dennison, Texas, not included in 

 the above. Hardy is a particularly good locality, as there is a wide 

 range of species. I found Vitrea simpsoni here on my last trip, the 

 most northern and eastern limit so far recorded. 



119c. Polygyra appressa (Say). At Hardy a highly sculptured 

 variety with small denticle upon the upper lip. This variety is known 

 as Say's " variety A." It measures from 18 to 20 mm. diameter. 



119d. Poly, appressa perigrapta (Pils.), typical. Little Rock. I 

 also have this from extreme northwestern Arkansas. 



120. Poly, elevata (Say). Hardy. 



125. Poly, clausa (Say). Hardy. 



134. Poly, labrosa (Bid.). Little Rock. 



190. Bifidaria procera (Gld.). At Hardy in '99. 



198. Bi. curvidens (Gld.). At Hardy in '99. 



199. Bi. pentodon (Say). At Hardy in '99. 



278-la. Conulus fulvus denlatus (Sterki). At Hardy in '99. 

 338c. Pyramidida alternata rarinotata (Pils.). At Dennison, Texas. 

 239. Circinaria concava (Say). Hardy and Little Rock. 

 340. Pyramidida solitaria (Say). Hardy. 

 342. Pyr. perspectiva (Say). Hardy. 

 34G. Helicodiscus lineatus (Say). Hardy. 



