2 AMPHIDROMUS, S.-G. BEDDOMEA. 



flagellum longer than and the epiphallus about as long as the penis. 

 Duct of the oblong or ovate spermatheca lengthened, more than 

 double the length of the penis. Penis with a large apical papilla 

 (fig. 22). 



Lung (pi. 2, fig. 23) having the pulmonary vein without large 

 branches, the venation densest on the intestinal side and near the 

 pneumostome, weak or well developed on the cardiac side. Kidney 

 long and narrow, nearly or quite four times the length of the peri- 

 cardium. Ureter reflexed, the secondary ureter a closed tube. 



Muscles : Retractor of the penis inserted on the diaphragm as 

 usual. The pharyngeal retractor is united to the right ocular and 

 pedal band far forward ; the left ocular muscle passes to the right of 

 the genitalia, not between the male and female branches (pi. 2, 

 fig. 21). 



Jaw well arched, thin, with its lower margin crenulated by 10-14 

 flat ribs which seem separated by narrow intervals in the median 

 part, but are contiguous or overlapping towards the ends. It is 

 similar to that of some species of Papuina, intermediate between the 

 plaited and the ribbed types. 



Radula of the usual form in Helicidce, the transverse rows of teeth 

 bent at a wide angle in the middle. Rhachidian and admedian teeth 

 with single, long, broadly rounded cusps. These pass by a gradual 

 transition to the lateral type, in which the tooth is inclined and bears 

 a three-lobed cusp. 



Distribution, southern India and Ceylon. 



Named for Col. C. E. Beddome. 



The shell does not have the brilliant coloring of many Amphi- 

 dromus, and is minutely punctulate, at least on the spire. The area 

 of distribution is separated from that of true Amphidromus. I have 

 elsewhere shown that Beddomea agrees with Amphidromus in the 

 long, band-like kidney, the pattern of lung-venation, the arrange- 

 ment of the muscles (except the eye retractor), the reproductive 

 system and the jaw. It differs from Amphidromus in having the 

 ^ye retractor muscle to the right of, instead of between the branches 

 of the genitalia, in having the cusps of the teeth of the median field 

 of the radula broadly rounded and simple, instead of deeply cloven 

 into three cusp?, as all the side-teeth are in the restricted group 

 Amphidromus,' and finally in having the radula longer than in 

 AmpMdromus. 



