香港的两栖和爬行动物

香港及其附近水域已有纪录的两栖和爬行动物共4目23科70属107种。本文着重分析陆地与淡水产种类，计有4目21科63属98种,其中目前仅见于香港的特有种4种，物种密度高达897．4／104km2，东洋界种类占绝对优势，其中主要为南中国成分，其次为印度支那成分和印度马来成分，香港与我国东南沿海各省（区）具有很高的生物相似值（＞0．4），在动物地理区划上属于东洋界华南区东南沿海亚区。香港地处北半球亚热带季风区，气候温暖湿润，雨量充沛，适合两栖爬行动物的生存和繁衍；但由于面积不大、地貌较不复杂，随着经济的发展和人口的增加，它们生存的地域越来越缩小，再加以人为的干扰，物种和数量有减少的趋势。

NOTES ON AMPHIBIANS AND REPTILES OF HONG KONG

Totally 107 amphibian and reptilian species have been recorded from Xianggang Special Administrative District (Hong Kong) of China. An update checklist of Hong Kong amphibians and reptiles is given as Table 1. Among which 23 amphibian and 75 reptilian species are living on land or in fresh - water. Based on 98 termstrial and fresh - water species, the species density of Hong Kong is 897.4/104km2, which is 123 times of that of Guangdong and 22 blues of that of Hainan. The fauna of Hong Kong is banly composed of southem Chinese (34.7%), Indo-Chinese (22.4%) and Indo-Malayan (20.4%)elements etc., as shown in Table 2. There only four (4.1% ) species are endemic. In comparison with Chinese southeastern coasl provinces or autonomous region(Table 3), Hong Kong has high biotic resemblance value with Guangdong (0. 68),Hainan (0. 59), Fujian (0. 56), and Guangh(0.49). hegeopophically, Hong Kong belongs to Southeastern Coast Subregion (= Fujian - Guangdong Coast Subregion in Zhao and Adler, 1993) of South China Region. Hong Kong specimens of four amphibians (Paramesotriton hongkongensis, Megophrys brachykolor, Amolops hongkongensis, and Philautus romeri) and four snakes(Cylsndrophis ruffus, Enhydris bennetti, Opisthotropis andersonii, and Opisthetropis laeralis) were examined by the author. Brief morphological features of those species are provided. Two lizards, validity of Dibamus boadeki and status of Riopa bowringu, are discussed in the Chinese text. The author would express his sincere thanks to Senckederg Museum, Frankfurt am Main, Germany; Zoologiches Forschungsinstitut und Museum Alexander Koenig, Bonn, Germany; Museum of Comparative Zoology, Cambridge, USA; Field Museum of Natural History, Chicago, USA; and American Museum of Natural History, New York, USA for permitting to examine Hong Kong specimens. Thanks also ic confessor Kraig Adler of Corned University for kindly providing literature and information.