196 RAMBLES OF A NATURALIST. [Oh. Xn. 



occurred from time to time under the stones ; but these 

 were not numerous in species. 



Besides the reefs of Labuan itself, each of the three small 

 islands between it and the mainland had their special points 

 of interest. At Daat several specimens of a large Dorid 

 occurred which was not found elsewhere. They were about 

 four iuches long, and two inches wide, with expansive giU- 

 tufts and large tentacles ; but not such beautiful animals as 

 most of their tribe. They had something of the appearance 

 of Doris tuberculata, though less variously coloured, being 

 usually grey and studded with tubercles above, the whole 

 under-surface smooth and blotched with irregular black 

 spots of various sizes upon a grey ground. I carried home 

 specimens of this animal for drawing and examination ; but 

 on looking at them the following morning, I found the wide 

 projecting margin of the mantle cut off close to the foot, as 

 though with a sharp scissors, leaving the thick slug-like body, 

 which rapidly decayed. At first I could not understand what 

 had done this, but immediately afterward a second specimen 

 performed the same feat. Attributing this spontaneous am- 

 putation to a suicidal act, arising from the fouling of the 

 water in which they were placed with some other animals, 

 and wishing to preserve the last specimen, I placed it by 

 itself in a large vessel with fresh salt-water; but next 

 morning I found it severed like the others. 



The adjoining island (Pulo Pappan), though barren in 

 Lepidoptera, offered features of great interest in other 

 respects. In the thick jungle land-shells were tolerably 

 abundant ; two or three elegant Cyclostomas being found on 

 the under sides of the leaves, and two species of Helix 

 of great beauty, tolerably common. One of these. Helix 

 atrofusca, of various delicate shades of light brown, was in 



