1892.] THE LAND-MOLLUSCA OF THE PHILIPPINES. 467 



but he does not figure any) I am quite unable to suggest. If an 

 Amphidromus, the balance of connection would be, on the whole, 

 with Formosa. The further investigation of the MoUusca of this 

 interesting group is very desirable. 



In the following table (pp. 468, 469) are examples of Indo-Ma- 

 layan genera which reach the Philippines. 



The following Indo-Malayan genera occur in the Philippines, but 

 have not yet been detected in Sumatra, Java, or Borneo, viz. : — 

 Hypselostoma (^philippinicum), Plectopylis (polyptyckia, trocho- 

 spiru), Ditropis {mira, cebuana, quadrasi), Cyathopoma {cornu, 

 meridionale, aries). 



Of Moluccan and Polynesian genera occurring in the Philippines, 

 and gradually diminishing through the Sunda Islands west- 

 ward, the following may be mentioned : — TrocJiomorpha : Philip- 

 pines 9, Borneo 8, Java 8, Sumatra 4 ; Jielicina: Philippines 16, 

 Borneo* 3, Java 1, Sumatra 0; Leptopoma: Philippines 31, 

 Borneo 11, Java 2, Sumatra 1 ; Cyclotus: Philippines 18, Borneo 6, 

 Java 2, Sumatra 1 ; Pujnna : Philippines 5, Borneo 3, Java 5, 

 Sumatra 3. Two species of Tornatellina (manillensis, ringens) occur 

 in the Philippines, but not farther westward, one of Endodonta 

 (^philippinensis), and one of the Leucochilus section of Pupa (the 

 pan-Polynesian pediculus). 



There seems to be a good deal of misunderstanding with regard 

 to the island Tukan Bessi (variously spelled Toekang Besi, Toukang 

 basi, Tukang Bessie, Toekun Bessi). It originally came into notice 

 as the habitat of three supposed Cochlostylce (thomsoni, Pfr., 

 indusiata, Pfr., tulanensis, Pfr.), described (as Helices) by Pfeiffer 

 in Malak. Blatt. .wiii. 1871, p. 120, f., from the collection of 

 Mr. J. H. Thomson ; the same locality is repeated in each case in 

 the ' Novitates,' vol.iv. pp. 71-73. Kobelt, in his papers on geo- 

 graphical distribution, quotes Issel (Monogr. Bornean Mollusca) as 

 referring one of these species to "the small islands north of Borneo," 

 and in his list gives Cochlostyla lots, iu/canensis, and pJiysalis all 

 from " Toekun Bessi." A'^on Mollendorff (Jahrb. deutsch. malak. 

 Gesell. xiv. p. 285) remarks that this island, as well as Tular and New 

 Behind, lies between the S. point of Mindanao and the Moluccas. The 

 only Tukan Bessi with which I am acquainted is off the S.E, point 

 of Celebes, in Lat. 4° S., Long. 124° E., and therefore well away 

 from the Sulu Sea or the Celebes Sea proper. No island of such a 

 name, or of a name anything approaching it, appears on the chart of 

 the seas north of Borneo. Either, therefore, the original locality of 

 Mr. Thomson's shells was incorrect, which there seems no reason to 

 believe, or the island has been wrongly located by succeeding writers. 

 What the island of "New Belaud" is, to which Mollendorff refers, and 

 from which Von Martens describes ^ his Cyclotus angulatus, I am 

 quite unable to conjecture. 



^ Lieut.-Ool. Godwin-Austen (P. Z. S. 1889, p. 352) adds crossei, Semp., to 

 the Bornean fauna, on the authority of the Brit. Mus., which has specimens 

 from " Palawan." I suspect this is an error. Semper's original locality was 

 Palauan in Luzon. 



^ Jahrb. deutsch, malak. Gesell. i, 1874, p. 56. 



