Jaw and Lingual Dentition of Pulmonata. Ill 



species. It is characterized by its extreme length, as would be expected 

 from the form of the shell. The vagina (v.) is extremely long and narrow. 

 The genital bladder (g. b.) is elongated oval, on a short, slender duct. 

 The penis-sac (p. s.) is very long, attenuated to' a point above, where the 

 retractor muscle is inserted. 



The digestive system is also very much elongated. The oesophagus 

 especially is excessively long, as are also the ducts to the salivary glauds. 



This species is extremely common all over St. Augustine 

 and its vicinity. The large form I found almost restricted 

 to the moat of the old fort, especially at the foot of the main 

 western wall." 



Helix Febigeri, Bland (Folygyra'). 

 Near Mobile, Alabama. Dr. E. R. Showalter. 

 Genitalia as in H. septemvolva (see pi. xii, fig. 6). 



Helix cereolus, Muhlf. (Polygyra). 



For this and many species of Key West I am indebted to 

 the kindness of Mr. W. W. Calkins. 



Jaw as usual in the subgenus (1. a), with over H ribs. 



Lingual membrane as usual (pi. xvi, fig. C). Teeth 22-1-22, with 9 

 laterals, the inner cutting point of the 10th tooth being bifid. Marginals 

 with base of attachment low, wide, with one inner, long, oblique, bifid 

 cutting point, and one short, bluntly bifid, small, outer cutting point. 



Genitalia as in last species. 



Helix Carpenteriana, Bland CPolygyra). 

 Key West. Mr. W. W. Calkins. 



Jaw as usual in the subgenus : (1. c.) : ribs over 12. 



Lingual membrane as usual (pi. xiii, fig. K). Teeth 22-1-22. The 

 character of the various teeth is shown in the figures. There are 9 laterals, 

 the 10th tooth having a bifid inner cutting point. 



I can now state that H. cereolus, Carpenteriana, septemvolva, volvoxis, 

 and Febigeri have the same dentition. In all, the splitting of the inner 

 cutting point commences at the tenth tooth. 



Genitalia as in II. septemvolva described herewith. 



