ASCENSION ISLAND EXPEDITION

As work on the breeding seasons on Ascension developed it became clear that it would be of great advantage to the final assessment of the results if they could he compared with the conditions on St. Helena, an island slightly further from the equator and with certain aspects of seasonal changes well developed. As the existing information was by no means sufficiently precise for this purpose, sanction was given for Dr. Stonehouse and his wife to visit St. Helena for three weeks in November (believed to be a critical season) and two other members of the expedition, Ashmole and Dorward, in April, at end of their work on Ascension. A subsidiary objective will be to examine the subfossil bird remains on St. Helena, not hitherto investigated, from which it is hoped to gain an idea of the, seabird population there in the recent past.
The following notes, dated 1 November, were written by Dr. Stonehouse just before he left Ascension for St. Helena.     

耶尔森菌强毒力岛*

近年来,人们发现了耶尔森菌强毒力岛,并对其结构与功能进行了大量研究。同时,在一些研究中,发现它也广泛存在于其它几种肠道致病菌中。就耶尔森菌毒力岛HPI结构与功能及它在其它肠道致病菌分布的研究现状作一综述。     

细菌的毒力岛

毒力岛是指细菌染色体上一段具有典型结构特征的基因簇,主要编码与细菌的毒力及代谢等功能相关的产物,已在致病菌中发现了30几个毒力岛。由于毒力岛具有可移动性,使其在细菌的进化,毒力的获得,以及新病原的出现中均具有重要的意义。     

THE SEA-BIRDS OF GOUGH ISLAND

Between November 1955 and May 1956 continuous observations were made on the sea-birds of Gough Island. These have been augmented by further occasional observations during seven subsequent years, and are compared with all previous published records for the island.
A check-list of 30 species of sea-birds has been compiled and substantiated, as far as possible, by a series of skins of 20 species.
Nearly 900 sea-birds cf 20 species were caught and measured, considerably more than at any previous time there; in the case of eight species, these are analysed in detail and some are compared with those from other populations.
The relative status of each species was estimated, together with total breeding populations where possible. In same cases the distribution of nests was mapped.
A detailed sound and photographic record, of 14 and 16 species respectively, was made.
Numbers of Wandering Albatrosses Diomedea exulans dabbenena and skuas Catharacta skua hamiltoni were ringed and colour-marked respectively to enable a more detailed study to be made of them.
General observations were made on the nesting seasons, breeding behaviour and moult of various species which are treated systematically.     

海南岛特有植物的研究

地海南岛的特有植物进行了统计分析,结果表明;涤南岛的中国特有属有１９属,其中海南特有属８属;中国特有种１１１０种,其中海南特有种５０５种,隶属于７９科,２６７属,论述了海南特有种的科属组成和地理分布,并对石灰岩地区的特有植物作了简要分析,从海南岛与我国其地区共有的中国特有种的统计可以看出,海南岛与广东的关系最为密切,次为广西,再次为云南,与华中的关系较为疏远。海南狄约暗荷戏搴０谓系退?