COCHLOSTYLA OF MINDORO PROVINCE 377 



Left camp No. 5 at 8 a. m. Nov. 17, proceeding along trail on east side of 

 ridge to series of flats at 6,300 feet elevation. Camp No. 6, named "Posey Flats" 

 in honor of "Posey" (E. D.) Merrill, botanist of the party. Camp No. 5 to 

 Posey Flats distance 1 mile. 



Nov. 19, Merrill and Hutchinson completed chopping out a trail to main ridge 

 of Halcon and along the main ridge nearly to the Peak, returning to Camp 6 at 

 dark, wet, hungry, and tired. Rained hard until noon. 



Nov. 20. Rained nearly all last night. High wind. Rained on. 



During the explorations of the United States Fisheries steamer 

 Albatross in the Philippines, we touched Mindoro and some of the 

 adjacent islands, where I had an opportunity to make collections 

 of land mollusks and other things. 



On June 4, 1898, we anchored in Mansalay Bay, where I made col- 

 lections on the west shore of the bay and along the river, entering 

 it here; also along the northeast point of the bay. 



On June 5 I covered half of the distance between the mouth of the 

 river leading to Lake Naujan and the Lake, collecting at intervals. 



June 8 and 9 we spent at Puerto Galera. Here I collected on 

 Paniquian and Medio Islands, as well as on the part of Mindoro 

 that forms the rest of the rim of the bay. 



July 14 and 15 were spent collecting on Lubang Island. We visited 

 Vigo Bay, Tilig Bay, Balikias Bay, and Loog Bay. From the latter 

 place a couple of expeditions were made to the summit of Gunting 

 Mountain, which among other things yielded a lot of the peculiar 

 Cochlostyla cepoides (Lea) . 



The most thorough and important mollusk collecting yet done in 

 Mindoro Province is in progress at the present time. Another ap- 

 parently indefatigable and enthusiastic collector, Pedro de Mesa, is 

 producing so many new and interesting finds that we may well 

 believe that all the past efforts scarcely represent a reconnaissance. 

 His splendid sendings made necessary the critical review here pub- 

 lished, which I hope may produce a better understanding of the 

 Cochlostyla fauna of the region. 



Helicostyla and Cochlostyla were proposed by Ferussac in the same 

 work * as subgenera of Helix; Helicostyla was placed in the group 

 Helicoides, and Cochlostyla in the Cochloides. For almost 40 years 

 thereafter these two subgenera were considered to belong to different 

 "genera" (groups we now would call families). 



Beck 2 recognized these two subgenera, removing from them a num- 

 ber of what he considered unrelated species and adding others. For 

 the first group he retained the name Helicostyla, but the second one 

 he renamed Orthostylus. He still, however, kept them in separate 

 "tribes" (or families). Pilsbry's citation of Article 28 of the Inter- 

 national Rules 3 has no bearing on the point in question, as Beck was 



1 Tableau systematique de la famille des limafons, p. 24, 1821. 



> Index molluscorum praesentis aevi musei principis angustissimi Chrlstiani Frederlcl, pp. 36, 49, 1837. 



« See Nautilus vol. 46, p. 71, 1932. 



