COCHLOSTYLA OF MINDORO PROVINCE 459 



Jay's Bulimus virgatus. Figure 6 is a copy of Grateloup's figure of 

 Partula labrella, published in the Actes de la Societe Linneenne de 

 Bordeaux, vol. 11, plate 4, figure 6. Figure 7 is a copy of Semper's 

 Cochlostyla sylvanoides, published on plate 10, figure 4, of his Reisen 

 im Archipel der Philippinen, pt. 2, vol. 3. Figure 8 is a copy of 

 calobaptus Jonas as figured by Philippi in his Abbildungen und 

 Beschreibungen neuer oder wenig gekannter Conchylien, on plate 1 

 of Bulimus, figure 6. Figures 10, 11, and 12 represent Bulinus dryas 

 Broderip as figured by Reeve in his Conchologia Iconica, on plate 9, 

 figures 45a-c. All these I consider belong here. 



I give three additional plates to show range of variation: 



In plate 103, the ground color consists of various shades of yellow. 

 Figure 7 is unicolor without a dark umbilical blotch or spot. It, 

 however, shows faint figurations on the early whorls. Figure 11 

 shows a very slender unicolor form with a heavy and broadly expanded 

 lip. Figure 10 also is unicolor, but here we have a pale brown edging 

 to the peristome. Figure 12 likewise is unicolor but differs markedly 

 in shape. Figure 6 is unicolor but stands intermediate in shape 

 between figure 12 and the usual form. Figure 4 is unicolor with the 

 outer lip and columella broadly expanded and thickened. Figure 8 

 is unicolor, except for marked fulgurations, but has the umbilical dark 

 area. Figure 9 is unicolor and more olivaceous than those preceding. 

 It has a faint umbilical dark area and an indication of a peripheral 

 zone. Figure 3 is markedly fulgurated with a peripheral brown band 

 and an umbilical patch of brown. Figure 5 has a purplish-brown band 

 at the summit and the peristome edged with the same color. There 

 is also an umbilical dark area of the same or a little darker tint. 

 Figure 2 has a dark band at the summit, a dark band at the periphery, 

 a dark area at the umbilicus, and a dark edging to the entire peristome. 

 Figure 1 has the early nuclear whorls light, succeeded by cloudy-brown 

 whorls, which in turn are followed by an orange-yellow one, the last 

 whorl having a light peripheral band. 



All the shells pictured on plate 103 have light nuclear tips with the 

 exception of figure 3, in which they are dark. To show how varied 

 these shells are in the same locality, I need but draw attention to the 

 fact that plate 103, figures 3 and 7, plate 104, figures 1, 2, 3, and 6, 

 and plate 105, figures 2 and 8, come from Ariod, Calapan, while plate 

 103, figures 9 and 12, plate 104, figure 10, and plate 12, figure 4, come 

 from Calapan. 



In plate 104 the ground color ranges from orange-red to bright 

 chestnut-brown. The nuclear whorls in figures 1, 5, 7, and 9 are 

 white; in the rest they are dark. The periostracum is fulgurated in 

 varying degrees with hydrophanous bands of varying widths and dis- 

 tribution. Here, as in plate 103, the interior of the aperture and 

 peristome are bluish white. In figures 1, 2, 3, 8, 10, 11, and 12 the 



