Jaw and Lingual Dentition of Pulmonata. 167 



Natural Sciences of Philadelphia, 1875, p. 145, full expla- 

 nation will be found of the terms I use. In the plates, I 

 have endeavored to give a perfect idea of the several forms 

 of teeth on each lingual membrane by figuring the central 

 with the first lateral tooth, the transition from lateral to mar- 

 ginal teeth, and a decided marginal, usually the last. The 

 position of each tooth from the median line is indicated on 

 the plates by numerals. The plates must, however, be 

 studied with the text. It will be seen that the cutting points 

 of the teeth are shaded. I have not, also, considered it 

 necessary fully to describe the genitalia in cases where I have 

 given a figure of the system. I have rather confined myself 

 to pointing out the characteristic feature of each. In the 

 lettering of the plates, I have not deemed it important to 

 indicate the testicle, epididymis, accessory gland, prostate, 

 vas deferens, ovary or oviduct, as those organs cannot fail to 

 be recognized. I have, however, indicated the penis sac, 

 retractor of same, genital bladder with its duct, and any 

 accessory organs that may occur. As in my former publica- 

 tions, I apply the terms ovary and testicle as does Dr. Leidy 

 in the first volume of "Terrestrial Mollusks of the United 

 States." 



Glandina truneata, Say. 



On plate xiv, fig. F, I have given a figure of the central tooth of this 

 species which is more accurate than that given in Proc. Phila. A. N. S., 

 1875, pi. i, fig. 1. It will be seen to agree with the figure of Morse (lb. 

 p. 156, fig. 2) as regards the presence of a distinct cusp. The figure was 

 drawn from the lingual membrane of a large Florida specimen. 



It will be of interest to note here that the largest speci- 

 mens of Glandina found by me near St. Augustine, were in 

 the centre of the clumps of large, coarse grass covering the 

 marshes at the edge of Matansas River. Mr. Say also 

 speaks of finding the largest specimens in the marshes imme- 

 diately behind the sand hills of the coast. 



