202 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 49. 



SCHISTOLOMA (SCHISTOLOMA) McGREGORI WEBBI, new subspecies. 



In this subspecies, which comes from southern Mindoro and Ihn 

 Island, the peristome varies from flesh-colored to light ])rown. 



Fifteen specimens from Mindoro give the following measurements: 



Cat. No. 200610, IT.S.N.i\I.; altitude, 23.8 mm.; diameter, 11.8 mm. Cagiiray, Min- 

 doro, (type). 

 Phil. Bxir. Science No. 37, altitude, 24.0 mm. ; diameter, 10 



diameter, 10.3 mm. 

 diameter, 10.2 mm. 

 diameter, 10.1 mm. 

 diameter, 10.1 mm. 

 diameter, 10.1 mm. 

 diameter, 11.0 mm. 

 diameter, 10.2 mm. 

 diameter, 11.1 mm. 

 diameter, 10.5 mm. 

 diameter, 10.4 mm. 

 diameter, 10.1 mm. 

 diameter, 10.3 mm. 

 diameter, 10.3 mm. 



Webb collection, altitude, 23.3 mm 



Webb collection, altitude, 21.1 mm." 



Webb collection, altitude, 21.8 mm. 



Webb collection, altitude, 22.5 mm. 



Webb collection, altitude, 21.2 mm. 



Webb collection, altitude, 23.0 mm. 



Webb collection, altitude, 22.5 mm. 



Webb collection, altitude, 22.8 mm. 



Webb collection, altitude, 23.0 mm. 



Webb collection, altitude, 22.5 mm. 



Webb collection, altitude, 21.5 mm. 



Webb collection, altitude, 25.0 mm. 



Webb collection, altitude, 22.3 mm. 



Average, altitude, 22.08 mm.; diameter, 10.40 mm. 



Greatest, altitude, 25.0 mm.; diameter, 11.8 mm. 



Least, altitude, 21.1 mm.; diameter, 10.1 mm. 



Nineteen specimens from Ilin Island yield the following measure- 

 ments : 



4 mm. Caguray, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Jilindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mansalay Bay, Mindoro. 

 Mangarin, Mindoro. 

 Mangarin, Mindoro. 



Cat. No. 195734, U.S.N.M.; altitude 

 Cat. No. 195734, U.S.N.M.; altitude 

 Webb collection, altitude, 23.5 mm. 

 Webb collection, altitude, 23.0 mm. 

 Webb collection, altitude, 24.4 mm. 

 We])b collection, altitude, 24.0 mm. 

 Webb collection, altitude, 24.0 mm. 

 Webb collection, altitude, 23.9 mm. 

 Webb collection, altitude, 24.0 mm. 

 Webb collection, altitude, 24.0 mm. 

 Webb collection, altitude, 24.1 mm. 

 Webb collection, altitude, 23.3 mm. 

 Webb collection, altitude, 24.9 mm. 

 Webb collection, altitude, 21.9 mm. 

 Webb collection, altitude, 23.0 mm. 

 Webb collection, altitude, 22.0 mm. 

 Webb collection, altitude, 22.3 mm. 

 Webb collection, altitude, 22.3 mm. 

 Webb collection, altitude, 22.0 mm. 

 Average, altitude, 23.47 mm 

 Greatest, altitude, 25.4 mm.; 



Least, altitude, 21.9 mm.; diameter, 10.0 mm. 



25.4 mm.; diameter, 11.0 mm. 



24.0 mm.; diameter, 10.3 mm. 



diameter, 11.0 mm. Ilin Id. 



diameter, 11.3 mm. Ilin Id. 



diameter, 11.2 mm. Ilin Id. 



diameter, 10.3 mm. Ilin Id. 



diameter, 10.3 mm. Ilin Id. 



diameter, 10.1 mm. Ilin Id. 



diameter, 10.9 mm. Ilin Id. 



diameter, 10.1 mm. Ilin Id. 



diameter, 10.1 mm. Ilin Id. 



diameter, 10.3 mm. Ilin Id. 



diameter, 10.8 mm. Ilin Id. 



diameter, 10.4 mm. Ilin Id. 



diameter, 10.0 mm. Ilin Id. 



diameter, 10.0 mm. Ilin Id. ■ 



diameter, 10.0 mm. Ilin Id. 



diameter, 10.2 mm. Ilin Id. 



diameter, 10.2 mm. Ilin Id. 

 diameter, 10.45 mm. 

 diameter, 11.3 mm. 



Ilin Id. 

 Ilin Id. 



