CLASSIFICATION OF HELICES. XXXV 



c. Shell solid, dark colored, quoit-shaped with 



wide umbilicus, flattened spire and subhori- 



zontal, oblong mouth, the lip blunt, subex- 



panded, rounded ; vagina with appendicula ; 



jaw smooth. Australian, Pedinogyra, p. 158. 



cc. Shell subtrochiform, conoidal and tuberculate- 



lirate above, polished and one-banded below 



the peripheral keel ; outer lip with a deflexed 



angle ; spermatheca duct with a sack ; jaw 



striate. Tasmanian Anoglypta, p. 159. 



bb. Shell bulimoid, higher than wide ; outer lip neither 



expanded or reflexed. 



c. Upper whorls spirally lirate, with crenulated 



suture. Tasmanian Caryodes, p. 161. 



cc. Upper whorls finely beaded or smoothish, 



suture even. Australian Panda, p. 163. 



aaaa. Soft anatomy unknown ; teeth all unicuspid ; shell quoit- 

 shaped, with wide umbilicus and low spire, uniform yellowish, 

 densely striate ; lip narrowly expanded throughout. S. Amer- 

 ica Macrocyclis, p. 165. 



Tribe III, TELEOPHALLOGONA. 



a. Shell smooth, depressed or trochoidal, light yellowish, having 

 the texture of Hyalina, composed of 6-9 narrow, closely 

 coiled whorls. Aperture small, narrowly lunate, often with 

 internal laminae, the lip thin, sharp and simple Sagda, p. 58. 

 aa. Shell globose, imperforate, of 5-6 convex whorls, the last 

 large, inflated, brown ; aperture large, rounded-lunate, tooth- 

 less, the lip thin and sharp, closely appressed at the white- 

 calloused columella Zaphysema, p. 65. 

 uaa. Shell conic or depressed, thin, not opaque, pale brownish or 

 corneous, umbilicate ; surface rather dull, often bristly or with 

 delicate riblets; whorls 4-6, separated by deep sutures. 

 Aperture round-lunate or oblong, toothless ; lip thin, often a 

 trifle expanded Thysanophora, p. 54. 



Tribe IV, EPIPHALLOGONA. 



a. Epiphallus developed, flagellum usually present, but short. 



b. Penis retractor inserted at apex of penis ; Ameri- 

 can Pleurodonte, p. 84. 



