Part 1. 



PHILIPPINE LAND SHELLS BARTSCH. 



13 



Cat. No. 



U.S.N.M. 



244676 » 



244676 



244676 



244676 



244676 



244677 



184564 

 244678 

 244678 2 

 244679 



244679 



105023 

 215578 

 302840 



Num- 

 ber 

 whorls. 



6.2 

 6.3 

 6.5 

 6.7 



6.6 



6.5 

 6.5 

 6.7 

 6.6 



7.2 

 6.3 



Length 

 in mm. 



57 

 60.5 

 59.5 

 61 



60.3 



57.4 

 61.7 

 57.6 

 54 



66.5 

 58.2 



Diame- 

 ter 

 in mm. 



31.5 

 32.1 

 31 

 31 



30.3 



30 

 33 



30.5 

 31 



33.6 



33.5 

 35.4 

 32.8 



Locality. 



Cotabato, Mindanao 



do 



do 



do 



Cotabato, Mindanao, one 

 young specimen. 



Cotabato, Mindanao, five ad- 

 ditional young specimens. 



Cotabato, Mindanao 



do 



do 



Libungan River and La'bas 

 River, Rio Grande Valley, 

 Mindanao. 



Libungan River and La'bas 

 River, Rio Grande Valley, 

 Mindanao, young individ- 

 ual, dextral. 



Loc? 



Kidapawan, Cotabato 



Kidapawan, Cotabato, Min- 

 danao. 



Collector. 



E. A. Mearna. 

 Do. 

 Do. 

 Do. 

 Do. 



Do. 



von Mollendorff. 

 E. A. Mearns. 



Do. 



Do. 



Do. 



Webb. 

 Henderson. 



Type. 



s Dextral. 



AMPHIDROMUS MACULIFERUS BULUANENSIS, new subspecies. 



Plate 5, figs. 1-6. 



Shell elongate-conic, with the whorls moderately rounded and ap- 

 pressed at the summit and the sutures moderately constricted, the 

 first two whorls bearing the dark filation in the suture, the succeed- 

 ing ones pale brown with an occasional retractive streak of light 

 brown or dingy white. These varicial streaks become much intensi- 

 fied on the last two volutions. The spotting is entirely absent. Aper- 

 ture normal. 



The type (Cat. No. 244688, U.S.N.M.) was collected with two other 

 specimens on the trail between Simpitan and Buluan, Mindanao, by 

 Lieut. Col. Edgar A. Mearns. The type has seven whorls and meas- 

 ures — length, 66.2 mm. ; diameter, 33.4 mm. Some of the specimens 

 have the whorls a yellowish white instead of light brown. These 

 are dead specimens and have probably been bleached. The follow- 

 ing material has been examined : 



