92 C. SKOTTSBERG 



C. Giiasabullena, a corruption of Hueso de Ballena), Morro Caletas ( = EI 

 Verciii<ijo), C. Chupones (now Pta Larga), Bahia Aguabuena [now Tierra Blanca, 

 but modern charts liave Pta Aguabuena between T. Blanca and Carvajal (Coq- 

 bajal of Friederichsen)j. The to{)ography is much clearer and more correct than 

 in any of the earlier maps. With the exception of Cerro Alto and Yunque no 

 names of mountains have been put in. 



R. PoKlll.MANNs sliort description of the islands, with special reference to the 

 geology, serves as an introduction to Johow's well-known work on the natural 

 histor\-. Johow s map of Masatierra, based on "recientes trabajos recopilados per 

 la ()hcina Ilidrogratica en 1895", gives a very unsatisfactory idea of the topo- 

 graph)-. 



Amador dc Amaya's map of 1795, with additions and corrections by the 

 British (no. 1383) and Chilean navies, remained the basis of all charts until 191 7, 

 when I handed over my notes and sketches to the Oficina Hidrografica. From 

 1918 on several editions have appeared. Pta Suroeste replaces Friederichsen's 

 Pta de los Xegros, but the latter should be preferred because not this point but 

 Pta de la Isla is the south-west point of Masatierra. For Monkey Key El Verdugo 

 is sanctioned, Cabo Chamelo is replaced by Los Chamelos, referring to the rocks 

 outside, Cabo Viudo by C. Norte, with the rock in front called Morro Viudo. 

 K of Co Tres Puntas Co Chumacera appears. More important is that, for the 

 first time, the valleys between Pto Frances and Pta Pescadores have been ind- 

 icated and named. On the Special of Cumberland Bay is the new name Cordon 

 de las Cabras for the ridge generally called C. Central. The British chart "with 

 corrections from the Chilean Gov. chart of 1921" reproduced by Quensel (2 p. 46) 

 shows the topography more distinctly than the former except of the east sec- 

 tion, where all the improvements have been omitted. A new name is Pta Mere- 

 daxia for Pta del Padre. The latest edition, revised up to March 1953, is iden- 

 tical, but for the topography a different technique has been used. 



The names used by Guzman in his text do not always agree with those on 

 the map. Me has taken up Herradura for Bahia del Padre, which is all right, but 

 when he called Bahia Juanango "l^^nsenada Pan de Azucar, cuyo nombre lo debe 

 a su islote Juanango" — the conical Morro — he made a mistake, because the 

 name Pan de Azucar belongs to Vaqueria and refers to Co Alto. 



During our expedition I tried to sketch the distribution of the forest, using 

 the chart as a basis. The position of the boundaries was determined with help 

 of simultaneous aneroid and temperature readings; the same observations were 

 made at sea level before and after every excursion and the elevations calculated 

 from tables I had received from the late IVofessor AxEL Hamberg. This method 

 does not, of course, give exact results, but it gives more reliable figures than 

 the altimeter. Our large series of photographs has been a great help. Neverthe- 

 less the need of a map. based on a real survey, was deeply felt, and when, in 

 195 I, I was going to |)ut my notes in shape for publication, I approached the 

 Chilean government through the Swedish Legation in Santiago and asked for 

 assistance from the Chilean Air l-'orce. This was most generously granted. During 

 a flight on April 8, 1952, Masatierra was photographed; unfortunately it was rather 



