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XV. — On the Anatomy of a Collection of Slugs from N.W. Borneo; with a List of 

 the Species recorded from that Region. By Walter E. Collinge, Lecturer on 

 Zoology and Comparative Anatomy in the University of Birmingham. Com- 

 municated by Professor W. C. M'Intosh. (With Three Plates.) 



(Read 3rd June 1901.) 

 CONTENTS. 



I. Introduction, 



II. The Bornean Slug-fauna, 



III. The Genus Damayantia, Issel, 



1. D. dilecta, Issel, 



2. I), carinata, n. sp., . 



IV. The Genus Wiegmannia, n. gen., 



1. W. dubius, Wgm., . 



2. W. gigas, n. sp., 



3. W. ponsonbyi, n. sp., 



4. W. borneensis, n. sp., 



5. W. sp., .... 

 V. The Genus Collingea, Simr., . 



1. ft smithi, Cllge. and Godw.-Aust., 

 VI. The Genus Isselentia, n. gen., 



1. I. plicata, n. sp., 



2. /. globosa, u. sp., 



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VII. The Genus Veronicella, Blainv., . . 307 



1. V. shelf 'or diana, n. sp., . . . 307 



2. V. exima, n. sp., .... 308 



VIII. The Genus Onchidium, Buchan. (em. Plate), 308 



1. (), ponsonbyi, n. sp., . . . 308 



IX. Summary and Conclusion, . . . 308 



X. List op Species op Slugs recorded prom 



Borneo, 309 



XL Bibliography, 310 



XII. Reference Letters, 310 



XIII. Description of Plates, .... 311 



I. Introduction. 



In the early part of 1900 I received from J. H. Ponsonby, Esq., a small collection 

 of land molluscs from N.W. Borneo, with a request that I would investigate and report 

 upon the same. This collection, the property of the Sarawak Museum, proved, on 

 examination, to contain examples of two new genera ( Wiegmannia and Isselentia) of 

 great interest. In the case of the former genus there were only two specimens, each 

 belonging to a different species ; and as more material was very desirable, Mr Ponsonby 

 very kindly invited the authorities of the Museum to send over, if possible, a further 

 collection. This, in due course, arrived, but contained duplicates of Isselentia only, the 

 remaining specimens being all new species, excepting one, which proved to be the 

 Damayantia dilecta of Issel, which. I believe, has not previously been found since 

 described in 1874. 



As there seems no immediate likelihood of obtaining further material, and so very 

 little is known of the slugs of this region, the results of the examination of the 



VOL. XL. PART II. (NO. 15). 



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