BULIMULID^E. 



It continues upward beyond the entrance of the spermatheca, ter- 

 minating in a short blind sac. This sac is homologous with the 

 accessory sac at the base of the spermatheca in Strophocheilus, and 

 perhaps with the appendiculum of Panda and Pedinogyra. The 

 lower portion of the ovi sperm duct is imbedded in the albumen 

 -gland as in Ampelita. There is no sheath about the base of the 

 >penis in G. turnix. The lumen of the penis is large, longitudinally 

 ,plicate, the folds crenulate. No papilla. 



In G. multicolor the lung is black-pigmented except posteriorly. 

 The spermatheca lies near the inner end of the pericardium. 

 G. goniostoma Fer., x, 122. G. turnix Gld., xvi, 133. 



G. erubescens Swains. G. multicolor Rang, x, 123. 



*G. hybrida Gld., x, 123. G. miersii Sowb., x, 124. 



JS. egregius Pfr. 



Family BULIMULID^E. 



Shell usually oblong or ovate, rarely columnar, helicoid or partially 

 degenerate and Succinea-like. Kidney triangular, as short as the 

 pericardium, with a reflexed ureter, and closed or rarely open 

 secondary or gut ureter. Lung having a long unbranched pulmonary 

 vein, the first branch of the pericardial vein sometimes well-devel- 

 oped, a branch of the vena cava lying between them ; the reticulation 

 chiefly confined to the region near the pneumostome between the last- 

 named branch and the rectum, and the tract between the pulmonary 

 vein and the last fold of the gut. Jaw made up of vertical or converg- 

 ing plates concrescent except at their outer and usually imbricating 

 margins (rarely completely united, and smooth). Radula of the 

 ordinary Helicid type or variously specialized. Intestine of the 

 usual four-folded type. In the free retractor muscle system the 

 right ocular band arises from the face of the columellar muscle and 

 the left ocular band is united for a greater or less distance with the 

 pharyngeal retractor muscle. 



While related to the Helicidce, snails of this family are well char- 

 acterized by the triangular kidney, not exceeding the pericardium in 

 -length. The jaw, lung and shell are also to a less extent character- 

 istic. The Acavidae and especially the Strophochilime are likewise 

 allied to Bulimulidce, but in these groups the kidney is oblong, pro- 

 longed backward, the ureter is imperfect or wanting, the jaw solid, 

 ithe pattern of lung venation diverse, and the nepionic shell larger. 



Those Helicida having a Bulimoid shell, such as Amphidromus, 



