310 COCHLICOPA. 



passing directly into the ureter, which does not reach the 

 collar. Heart much shorter than the kidney. The pulmon- 

 ary vein has no large branches, but there is a fine capillary 

 reticulation of the lung. At the left anterior angle there is 

 a large glandular area of large cells (page 213, fig. 2, gl.) . 



Genitalia (page 213, fig. 3) with a long appendix inserted 

 on the penis. This appendix is contracted near the middle, 

 swollen again at the distal end. The spermetheca is oval on 

 a rather long duct. 



The buccal mass has the usual short form. Salivary 

 glands short, compact, concrescent around the slender oeso- 

 phagus. There is no crop. The jaw is arcuate, delicately 

 and closely plaited vertically. The radula (fig. 1, C. lubrica 

 from Philadelphia, Pa.) has 20,1,20 teeth. Centrals narrow, 

 with a short middle cusp, no side cusps; laterals wide, with 

 square basal plates and a large inner cusp (mesocone) ; outer 

 cusp small, with a small cutting point only. There are 8 

 perfect laterals, the 9th or 10th tooth having the ectocone 

 split. The marginals are low and wide, and have both cusps 

 split, forming a pectinate edge of 4 to 6 denticles, decreasing 

 towards the outer teeth. [Binney found distinct ectocones 

 on the central tooth of an example from Maine; they have 

 also been figured by Thomson.] 



Type C. lubrica (Miiller). Distribution, Holarctie realm: 

 Europe, north Africa, Asia and North America. In Euro- 

 pean beds species have been found from the Eocene to the 

 present time. 



The foot in this genus seems to have no such pedal 

 grooves as have been figured for Ferussacia, at least in the 

 alcoholic examples available. There is certainly no caudal 

 mucus pore visible. These characters together with the ob- 

 long shape of the shell, with a short, broadly ovate aperture, 

 widely separate Cochlicopa from Ferussacia. The geological 

 history of the two groups has doubtless been diverse ; the dis- 

 tribution of Cochlicopa suggests that it may have been evolved 

 on the Scandinavian land-mass of Mesozoic times, while 

 Ferussacia was more southern, probably on the Iberian land- 

 mass. 



