. Animal life as affected by the natural conditions of existence. Animal ecology. THE PHILIPPINES AN INSTANCE. 285 distinct species occur which can be included in these genera. Thus three species found in Borneo belong to the genus Cochlo- styla [antiqua, sulcocincta, and xanthostoma). Ghlorcea (see fig. 73, 6 c) is entirely confined to the Philippines, and is not found even in Mindanao; Helioarion also is a purely Philippine genus, and its nearest allies even do not occur in India, as might be expected from Wallace, but in the Australian region; of the genus Obhina four species belong to the
. Animal life as affected by the natural conditions of existence. Animal ecology. THE PHILIPPINES AN INSTANCE. 285 distinct species occur which can be included in these genera. Thus three species found in Borneo belong to the genus Cochlo- styla [antiqua, sulcocincta, and xanthostoma). Ghlorcea (see fig. 73, 6 c) is entirely confined to the Philippines, and is not found even in Mindanao; Helioarion also is a purely Philippine genus, and its nearest allies even do not occur in India, as might be expected from Wallace, but in the Australian region; of the genus Obhina four species belong to the Australian province and one to Borneo; Ehysota is confined to the Philippines. Associated vfiih. these peculiar forms are other genera which are not characteristic of these islands, and which have a very remarkable geographical distribution. Closely related to Chlo- rcBa—in anatomical structure, though not in the appearance of. ^^"^ Pig. 74.—Amphidromus macuH/ems, Sow. the shell—is the widely diffused group of ffelix similaris, which is very common throughout the China region: three or four species occur in the north of Luzon, and only one extends as far south as Bohol; none at all are found in Mindanao. The only Philippine species of the genus Clausilia inhabits the island of' Camiguin to the north of Luzon; it belongs to a Chinese divi- sion of this widely distributed and highly variable family. Ghlorma itself is most extensively developed in the north of Luzon. Thus these three genera give to the fauna of the north- ern Philippines a sprinkling, as I may say, of the Chinese. At the extreme south, on the other hand, there is a certain harmony with the fauna of the Moluccas and the Malayan peninsula. For instance, the genus Amphidromus, which is so characteristic of the Malayan province (see fig. 74), sends only. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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