PLATE VII. 
Cor. trigonatum. Fig. 1, old specimen of the stout variety, showing adult suture and the 
closer approximation and degenerative changes in lobes and saddles in old age, figure reduced to 
about one third. Loc. Aalen,} 
Cor. bisulcatum. Fig. 2-4, young. Fig. 5, 6, young with earlier developed and more 
prominent pile. The coarse heavy pile of the last figure are remarkable, and the young has 
also a broader abdomen and a form like an older stage of Cor. latum. Fig. 7 shows the decrease 
in breadth of the abdomen with age, which is also seen in Fig. 6. Fig. 8, older stage, with 
suture. Fig. 9, 10, nearly full-grown stage of same variety. Loc. Semur. 
Agas. Scipionianum.? Fig. 11, 12, young of gibbous variety. Fig. 13, 14, young, show- 
ing development of pile from folds. Fig. 13a, 14 a, enlarged sutures also indicated upon 
corresponding figures, Fig. 15, front view of same specimen as that of Plate X. Fig. 13. 
Loc. Semur. 
1 See, for ventral view of same, Plate VI. Fig. 3. 
? See Plate X. Fig. 11-13. Summ. Pl. XIIL BIB, fs 
