1887.] MR. THOMAS ON MAMMALS FROM THE CAMEROONS, 121 



111 Hapale jacchus the caecum distended with air, dried and var- 

 nished, showed three folds of peritoneum running along its U|)per 

 surface, as described by Prof. Flower ' in Ateles ; the frenum or 

 median band is extrennely short and bears no blood-vessel. The 

 lateral folds arise precisely as is indicated by Prof. Flower, but one of 

 them is much longer than the other and reaches nearly to the end of 

 the caecum, while the other does not reach so far as does the median 

 frenum. 



In Midas rufimanus a spirit-specimen of the caecum showed the 

 same three folds, which were, however, partially united together into 

 an apparently single fold ; this was easily separable into three layers 

 — a median fold without blood-vessels, and two lateral folds, each 

 bearing a blood-vessel. 



4. List o£ Mammals from tlie Cameroons Mountain, collected 

 by Mr. H. H. Johnston ^. By Oldfield Thomas. 



[Keceived January 4 ,1887.] 



In order to complete the list of the zoological specimens collected 

 by Mr. II. II. Johnston, I have been asked to contribute the names 

 of the two Mammals he obtained. They are as follows : — 



1. Anomalurus BEECROFTi, Fraser. 



a. Skin and skeleton, cJ . Cameroons Mountain, 8000 feet. 



2. Mus TJNiviTTATus, Pctcrs. 



a. Skin, $ , Cameroons Mountain, 8000 feet. 



1 Med. Times and Gazette, 1872. 



^ [Mr. Johnston's narrative of bis ascent of the Cameroons Mountain last year, 

 during -which the collections described in this and the following communications 

 •were made, ■« ill shortly appear in the ' Graphic ' ivith illustrations. Setting out 

 from Victoria, opposite his residence on Mondole Island, Mr. Johnston pro- 

 ceeded by Bonjongo and Mapanja (3000 feet alt.) to Mann's Spring, where he 

 encamped at an altitude of 73C0 feet. Here the temperature ranged from 50° 

 to 60° Fahr., and for the first week of his stay he lived in a perpetual rainfall. 

 The forest-region ceases at about 7000 feet, and gives ])lace to grassy downs, 

 dotted with patches of woodland and varied by huge isolated boulders of rock 

 and ancient lava-flows. Here a corresponding change in the flora and fauna 

 takes place. Mr. Johnston tells us : — 



"Mann's Spring is a favourite resort of birds, who alway affect the vicinity of 

 water, and here especially tbej- make the air musical with their twittering songs 

 and mellow love-calls. As man is a rare visitant here, the birds are very bold 

 and fearless, and appeared to welcome our coming for the chance scraps of food 

 thrown in their way. Alas ! they soon had to rue their over-confidence. They 

 had put themselves in the power of one whose natural tender-heartedness and 

 love of living things are overborne by his interest in science. Of all the pretty 

 bird-forms v^■hich came to drink and sport and bathe by the brooklet, or which 

 hovered about the balsam-blossoms, some of every kind must die to illustrate 

 the ornithology of the Cameroons. And so my native collector and I were soon 



