Parti. PHILIPPINE LAND SHELLS BARTSCH. 9 



and is undoubtedly a coastal race. The material before us agrees well 

 with Sowerby's figure, which represents an elongate-ovate, spotted 

 form without varices. 



On the slopes of Mount Malindang another form occurs, which is 

 decidedly shorter, more chubby, more brightly colored, with a few 

 faint indications of varices. To this race I have given the subspecific 

 name cataganensis. 



In the Cotabato region, or, in other words, the lower Rio Grande 

 Valley, we find another race which is profusely spotted and provided 

 with very strong, dark, varicial bands. To this race I have applied 

 the name cotabatensis. 



In the upper regions of the Rio Grande, about Lake Buluan, we 

 find another race, which lacks the spotting altogether, but has strong, 

 brown varices, which I have called buluanensis. 



On the southeast coast of Mindanao, along the shores of the Gulf 

 of Davao, another race occurs, which is very elongate-ovate, has al- 

 ternating pale-brown and hydrophanous axial bands and a general 

 rosy suffusion on the surface. This is von Mollendorff's strigatus. 



On northeastern Mindanao still another race is found, which is 

 nearest allied to strigatus, but is always pale, lacking the rosy suf- 

 fusion and also the dark varicial bands. This is gracilior Fulton. 



North of Mindanao, the islands of Bohol, Leyte, and Samar each 

 contain a race of maculiferus. That in Bohol is smaller than strigatus 

 and gracilior, and is provided with alternating bands of pale brown 

 and dingy white. This I shall term boholensis. On the island of 

 Leyte we have the race named multicolor by von Mollendorff. It is 

 an exceedingly dark-colored race, by far the most marked of all the 

 forms so far mentioned. The race living on the island of Samar is 

 more nearly related to that of Bohol than to that of Leyte. It is of 

 darker color and stouter form than the Bohol race, and may be 

 known as samarensis Bartsch. 



South of Mindanao we have the race now described as cosmius 

 Bartsch, occurring on Basilan Island. This race is the smallest of 

 the entire group. It has the general form and markings of gracilior 

 Fulton, but differs from it by its diminutive size and a much lesser 

 number of hydrophanous bands and in being suffused with faint 

 yellow. 



An additional race from the island of Cebu is indicated by Semper, 

 who is quoted on page 18. 



As derived from the group of maculiferus may be considered the 

 mountain species occurring on Mount Malindang and Mount Apo 

 in Mindanao. Both of these forms have the dark filations on the 

 early whorls, which indicate relationship to maculiferus, but the 

 rest of the characters are sufficient in my estimation to entitle them 

 to full specific rank, and so I have called them malindang ensis and 



