C'ocoeiro Palm JOURNEY IN BRAZIL. BY PBOFESSOB AND MBS. LOUIS AGASSIZ. And whenever the way seemed long, Or his heart began to fail, She would sing a more wonderful song, Or tell a more marvellous tale. LONGFELLOW. BOSTON: TICKNOR AND FIELDS. 1868. Entered according to Act of Congress, in the year 1867, by TICKNOR AND FIELDS, in the Clerk's Office of the District Court of the District of Massachusetts. FIFTH EDITION. UNIVERSITY PRESS: WELCH, BIGELOW, & Co., CAMBRIDGE. TO MR. NATHANIEL THAYER, THE FRIEND WHO MADE IT POSSIBLE TO GIVE THIS JOURNEY THE CHARACTER OF A SCIENTIFIC EXPEDITION, hes of l.ra/.il. — Easter Sunday. — First Sight of South American Shore. — Olinda. — Pernambuco. — Catamarans. — Tenth Lec ture: Methods of Collecting. — Eleventh Lecture: Classification of Fishes as illustrated by Embryology. — Preparations for Arrival. — Twelfth Lec ture: Practical Les-on in Embryology. — Closing Lecture: Transmu tation Theory; Intellectual and Political Independence. — Resolutions and Speeches. — Singular Red Patches on the Surface of the Sea. . . 1-45 CHAPTER II. RIO T>F. JANEIRO AND ITS ENVIRONS. JUIZ DE FORA. Arrival. — Aspect of Harbor and City. — Custom-House. — First, Glimpse of Brazilian Life. — Negro Dance. — Effect of Emancipation in United States upon Slavery in Brazil. — First Aspect of Rio de Janeiro on Land. — Picturesque Street Groups. — Eclipse of the Sun. — At Home in Rio. — Larangeiras. — Pa-seio Publico. — Excursion on the Dom Pedro Railroad. — Visit of the Emperor to the Colorado. — Cordiality of the Government to the Expedition. — Laboratory. — Botanical Garden. — Alley of Palms. — Excursion to the Corcovado. — Juiz de Fora Road. — Petropolis. — Trop ical Vegetation. — Ride from Petropolis to Juiz de Fora. — Visit to Sen- hor Lago. — Excursion to the Forest of the Empress. — Visit to Mr. Halfeld. — Return to Rio.— News of the Great Northern Victories, and of the President's Assassination 46- xii TABLE OF CONTENTS. CHAPTER III. LIFE IX RIO CONTINUED. — FAZENDA LIFE. Botafogo. — Insane Hospital. — Tijuca. — Erratic Drift. — Vegetation. — Birthday Dinner. — Arrangements for Parties to the Interior. — Public Lectures in Rio. — Procession of St. George. — Leave Rio on Excursion to the Fortaleza de Santa Anna. — Localities for Erratic Drift between Rio and Petropolis. — Departure from Juiz de Fora. — Arrival at the Fazenda. Ride in the Forest. — Eve of San Joao. — Cupim Nests. — Excursion to the Upper Fazenda. — Grand Hunt. — Picnic. — Coffee Plantation.— Return to Rio. — Mimic Snow-Fields. — Coffee Insect spinning its Nest. — Visit to the Fazenda of Commendador Breves. — Botanizing Excursion to Tijuca. — Preparations for leaving Rio. — Major Coutinho. — Collegio Dom Pedro Segundo. 80-125 CHAPTER IV. VOYAGE UP THE COAST TO PARA. On board the Cruzeiro do Sul. — Members of the Party. — Arrival at Bahia. — Day in the Country. — Return to the Steamer. — Conversation about Slavery ill Brazil. — Negro Marriages. — Maceio. — Pernambuco. — Parahyba do Norte. — Ramble on Shore. — Ceara. — Difficult Landing. — Brazilian Baths. — Maranham. — Assai Palm. — Visit to Orphan Asvlum. — Detained in Port. — Variety of Medusae. — Arrival of American Gunboat. — More Medusae. — Dinner on Shore. — Cordiality toward the Expedition. — Arrival at Para. — Kind Reception. — Environs of Para. — Luxuriant Growth. — Markets. — Indian Boats. — Agreeable Climate. — Excursion in the Harbor. — Curious Mushroom. — Success in collecting, with the assistance of our Host and other Friends. — Fishes of the Forests. — Public Expressions of Sympathy for the Expedition. — Generosity of the Amazonian Steamship Company. — Geological Character of the Shore from Rio to Para. — Erratic Drift. — Letter to the Emperor. . 126 - 151 CHAPTER V. FROM PARA TO MANAOS. First .Sunday on the Amazons. — Geographical Question. — Convenient Ar rangements of Steamer. — Vast Dimensions of the River. — Aspect of Shores. — Village of Breves. — Letter about Collections. — Vegetation. — Variety of Palms. — Settlement of Tajapuru. — Enormous Size of Leaves of the Miriti Palm. — Walk on Shore. — Indian Houses. — Courtesy of Indians. — Row in the Forest. — Town of Gurupa. — River Xingu. — Color of Water. — Town of Porto do Moz. — Flat-topped Hills of Almey- rim. — Beautiful Sunset. — Monte Ale"gre. — Character of Scenery and Soil. — Santarem. — Send off Party on the River Tapajoz. — Continue up the Amazons. — Pastoral Scenes on the Banks. — Town of Villa Bella. — Canoe Journey at Night. — Esperanca's Cottage. — Picturesque Scene at Night. — Success in Collecting. — Indian Life. — Making Farinha. — Dance in the Evening. — Howling Monkeys. — Religious Impressions of Indians. — TABLE OF CONTENTS. Cottage of Maia. — His Interest in Educating his Children. — Return to Steamer. — Scientific Results of the Excursion 152-184 CHAPTER VI. LIFE AT MANAOS. — VOYAGE FROM MANAOS TO TAHATINGA. Arrival at Manaos. — Meeting of the Solimoens with the Rio Negro. — Do mesticated at Manaos. — Return of Party from the Tapajoz. — Generosity of Government. — Walks. — Water-Carriers. — Indian School. — Leave Ma naos. — Life on board the Steamer. — Barreira das Cudajas. — Coari. — Wooding. — Appearance of Banks. — Geological Constitution. — Forest. — Sumaumeira-Tree. — Arrow-Grass. — Red Drift Cliffs. — Sand-Beaches. — Indian Huts. — Turtle-Hunting. — Drying Fish. — Teffe. — Doubts about the Journey. — Unexpected Adviser. — Fonte Boa. — Geological Char acter of Banks. — Lakes. — Flocks of Water Birds. — Tonantins. — Pic turesque Grouping of Indians. — San Paolo. — Land-Slides. — Character of Scenery. — Scanty Population. — Animal Life. — Tabatinga. — Aspect of the Settlement. — Mosquitoes. — Leave one of the Party to make Col lections. — On our Way down the River. — Party to the Rivers lea and Hyutahy. — Aground in the Amazons. — Arrival at Teflfe". . . 185-211 CHAPTER VII. LIFE IN TEFEE. Aspect of Teffe". — Situation. — Description of Houses. — Fishing Excur sion. — Astonishing Variety of Fishes. — Acarti. — Scarcity of Laborers. Our Indoors Man. — Bruno. — Alexandrina. — Pleasant Walks. — Man- dioca-shed in the Forest. — Indian Encampment on the Beach. — Excursion to Fishing Lodge on the Solimoens. — Amazonian Beaches. — Breeding- Places of Turtles, Fishes, etc. — Adroitness of Indians in finding them. — Description of a "Sitio." — Indian Clay-Eaters— Cuieira-Tree — Fish Hunt. — Forest Lake. — Water Birds. — Success in Collecting. — Evening Scene in Sitio. — Alexandrina as Scientific Aid. — Fish Anecdote. — Relations between Fishes as shown by their Embryology. — Note upon the Marine Character of the Amazonian Faunae. — Acara. — News from the Parties in the Interior. — Return of Party from the lea. — Prepara tions for Departure. — Note on General Result of Scientific Work in Teffe". — Waiting for the Steamer. — Sketch of Alexandrina. — Moeuim. — Thunder-Storm. — Repiquete. — Geological Observations. . . 212 250 CHAPTER VIII. RETURN' TO MANAOS. — AMAZONIAN PICNIC. Arrival at Manaos. — New Quarters. — The Ibicuhy. — News from Home. Visit to the Cascade. — Banheiras in the Forest. — Excursion to Lake Hyannary. — Character and Prospects of the Amazonian Valley. — Recep tion at the Lake. — Description of Sitio. — Successful Fishing. — Indian Visitors. — Indian Ball. — Character of the Da»cing. — Disturbed Night. — Xiv TABLE OF CONTENTS. Canoe Excursion. — Scenery. — Another Sitio. — Morals and Manners. — Talk with the Indian Women. — Life in the Forest. — Life in the Towns. Dinner-Party. — Toasts. — Evening Row on the Lake. — Night Sceue. — Smoking among the Senhoras. — Return to Manaos. . . . 251 - 275 CHAPTER IX. MANAOS AND ITS NEIGHBORHOOD. Photographic Establishment. — Indian Portraits. — Excursion to the Great Cascade. — Its Geological Formation. — Bathing Pool. — Parasitic Plants. — Return by the Igarape*. — Public Ball. — Severity in Recruiting, and its Effects. — Collecting Parties. — Scenes of Indian Life. — Fete Champetre at the Casa dos Educandos. — Prison at Manaos. — Prison Discipline on the Amazons. — Extracts from Presidential Reports on this Subject. — Prison at Teffe. — General Character of Brazilian Institutions. — Em peror's Birthday. — Illuminations and Public Festivities. — Return of Col lecting Parties. — Remarks ou the Races. — Leave Manaos for Muuhes. 276 - 300 CHAPTER X. EXCURSION TO MAUHES AND ITS NEIGHBORHOOD. Leave Manaos. — On board the Ibicuhy. — Navigation of the River Ra mos. — Aspect of the Banks. — Arrival at Mauhes. — Situation of Mau- hes. — Tupinambaranas. — Character of Population. — Appearance of the Villages of Mauhes. — Bolivian Indians. — Guarana. — Excursion to Mu- caja-Tuba. — Mundunicu Indians. — Aspect of Village. — Church. — Dis tribution of Presents. — Generosity of the Indians. — Their Indifference. — Visit to another Settlement. — Return to Mauhes. — Arrival of Mundura- cus in the Village. — Description of Tattooing. — Collection. — Boto. — Indian Superstitions. — Palm Collection. — Walk in the Forest. — Leave Mauhes. — Mundurucu Indian and his Wife. — Their Manners and Ap pearance. — Indian Tradition. — Distinctions of Caste. . . . 301-321 CHAPTER XI. ' RETURN TO MANAOS. — EXCURSION ON THE RIO NEGRO. Christmas Eve at Manaos. — Ceremonies of the Indians. — Churches on the Amazons. — Leave Manaos for the Rio Negro. — Curious River Formation. — Aspect of the River. — Its Vegetation. — Scanty Population. — Village of Tana Pe"assu. — Padre of the Village. — Palms. — Village of Pedreira. — Indian Camp. — Making Palm-thatch. — Sickness and Want at Pedreira. — Row in the Forest. — Tropical Shower. — Geology of Pedreira. — Indian Recruits. — Collection of Palms. — Extracts from Mr. Agassiz's Notes oil Vegetation. — Return to Manaos. — Desolation of the Rio Negro. — Its fu ture Prospects. — Humboldt's Anticipations. — Wild Flowers. — Distribu tion of Fishes in the Amazonian Waters. — How far due to Migration. — Hydrographic System. — Alternation between the Rise and Fall of the Southern and Northern Tributaries. . 322 - 350 TABLE OF CONTENTS. XV CHAPTER XII. DOWX THE RIVER TO PARA. — EXCURSIONS ON THE COAST. 1'arewell Visit to the Great Cascade at Manaos. — Change in its Aspect. — Arrival at Villa Bella. — Return to the House of the Fisherman Maia. — Excursion to the Lago Maximo. — Quantity of Game and Waterfowl. — Victoria regia. — Leave Villa Bella. — Arrive at Obydos. — Its Situation and Geology. — Santarem. — Visit to the Church. — Anecdote of Martius. — A Row overland. — Monte Alegre. — PictureAY AT SKA. — GULF STREAM. — GULF-WEED. — LECTURES PRO POSED.— FIRST LECTURE: " ON THE GULF STREAM IN THE GULF STREAM." — AQUARIUM ESTABLISHED ON ROA RI). — S Ef .'ONI> LECTURE. — ROUGH SEA. — PECULIAR TINT OF \\'ATKR. — THIRD LECTURE: LAYING OI;T WORK OF •.VPEDITION IN P.RA/IL ; DISTRIBUTION OF FlSHES IN BRAZILIAN RlVEKS; IT3 BEARING ON OlJlGIN OF SPECIES; COLLECTING OF FGGS. — TROPICAL SUX- ,r/r. — Fof i :TH LECTURE: PLAN OF GEOLOGICAL INVESTIGATIONS WITH SFE- •IAL REFERENCE TO GLACIAL PHENOMENA IN Sou III AMKRICA. — pLYING- 'ISH. — FIFTH LECTURE: GLACIAL PHENOMENA, CONTINUED. — SECOND SUN- >AV AT SKA.— ROUGH WATER. — SIXTH LECTURE: EMBRYOLOGICAL INVES TIGATIONS AS A GUIDE TO SOUND CLASSIFICATION. — SEVENTH LECTURE. — MOONLIGHT NIGHTS. — TRADE-WINDS. — KIGIITH LECTURE: IMPORTANCE OF PRECISION IN I.OCALI/.ING SPECIMENS. — SOUTHERN ('ROSS. — NINTH LEC TURE: FRESH-WATER FIMIES OF I'.RAXIL. — KASTER SUNDAY. — FIRST SIGHT OF SOUTH AMERICAN SHOKE. — OUNDA — PERNAMRUCO. — CATAMARANS. — TENTH LECTURE: METHODS OF COLLECTING. — KLEVENTH LECTURE: CLAS SIFICATION OF FlSHES, AS ILLUSTRATED P.Y F.M I'.R YOLOfJ Y. — PREPARATIONS FOK ARRIVAL — TWELFTH LECTURE: PRACTICAL LESSON IN EMBRYOLOGY — CI/>SING LECTURE: TRAN.-MI TATION THEOP.Y ; INTELLECTUAL AND Po- IJTICAL INDEPENDENCE. — RESOLUTIONS AND SPEECHES. — SINGULAR RED PATCHES ON THE SURFACE OF THE SEA. April 2<7, 1805. — Our first Sunday at sea. The weather is delicious, the ship as steady as anything on the water can lie, and even the most forlorn of our party have little excuse for sea-sickness. We have had service from Bishop Potter this morning, and since then we have been on deck reading, walking, watching a singular cloud, which the captain says is a cloud of smoke, in the direction of Pe tersburg. We think it may be the smoke of a great deci- 2 A JOURNEY IN BRAZIL. sive engagement going on while we sail peacefully along. What it means, or how the battle ends, if battle it be, we shall not know for two months perhaps.* Mr. Agassiz is busy to-day in taking notes, at regular intervals, of the temperature of the water, as we approach the Gulf Stream. To-night we cut it at right angles, and he will remain on deck to continue his observations. April 3d. — The Professor sat up last night as he in tended, and found his watch, which was shared by one or two of his young assistants, very interesting. We crossed the Gulf Stream opposite Cape Hatteras, at a latitude where it is comparatively narrow, some sixty miles only in breadth. Entering it at about six o'clock, we passed out of it a little after midnight. The western boundary of the warm waters stretching along the coast had a temperature of about 57°. Immediately after entering it, the temperature began to rise gradually, the maximum being about 74°, falling occasionally, however, when we passed through a cold streak, to 68°. These cold streaks in the Gulf Stream, which reach to a considerable depth, the warm and cold waters descending together in immediate contact for at least a hundred fathoms, are attributed by Dr. Bache to the fact that the Gulf Stream is not stationary. It sways as a whole sometimes a little toward the shore, sometimes a little away from it, and, in consequence of this, the colder water from the coast creeps in, forming these verti cal layers in its midst. The eastern boundary is warmer * On the 17th of May, nearly a month after our arrival in Rio, this cloud was interpreted to us. It was, indeed, charged with the issues of life and death, for it was on this day and the following that the final assaults on Petersburg were made, and the cloud which marred an otherwise stainless sky, as we were passing along the shores of Virginia, was, no doubt, the mass of smoke gath ered above the opposing lines of the two armies. VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 3 than the western one, for the latter is chilled by the Arctic currents, which form a band of cold water all along the Atlantic shore. Their influence is felt nearly to the lati tude of Florida. On coming out of the Gulf Stream the temperature of the water was (38°, and so it continued for an hour longer, after which Mr. Agassiz ceased his obser vations. To-day some of the gulf-weed was gathered by a sailor, and we found it crowded with life. Hydro-ids, in numbers, had their home upon it ; the delicate branching plumularia and a pretty campaimlaria, very like some of our New England species ; beside these, bryozoa, tiny com pound mollusks, crusted its stem, and barnacles were abun dant upon it. These arc all the wonders that the deep has yielded ns to-day, though the pretty Portuguese men-of-war go floating by the vessel, out of reach thus far. Such are the events of our life : we eat and drink and sleep, read, study Portuguese, and write up our journals. April 4fh. — It has occurred to Mr. Agassiz, as a means of preparing the young men who accompany him for the work before them, to give a course of lectures on ship board. Some preparation of the kind is the more necessary, since much of the work must be done independently of him, as it will be impossible for so large a party to travel together ; and the instructions needed will be more easily given in a daily lecture to all, than in separate conversa tions with each one singly. The idea finds general favor. The large saloon makes an excellent lecture-room ; a couple of leaves from the dining-table with a black oil-cloth stretched across them serve as a blackboard. The audi ence consists, not only of our own company, but includes the few ladies who are on board, Mr. Bradbury, the captain of our steamer, Bishop Potter, some of the ship's officers, 4 A JOURNEY IN BRAZIL. and a few additional passengers, all of whom seem to think the lecture a pleasant break in the monotony of a sea voy age. To-day the subject was naturally suggested by the sea weeds of the Gulf Stream, so recently caught and so crowded with life, — "A lecture on the Gulf Stream in the Gulf Stream," as one of the listeners suggests. It was opened, however, by a few words on the exceptional character of the position of this scientific commission on board the Colorado. " Fifty years ago, when naturalists carried their investiga tions to distant lands, either government was obliged to pro vide an expensive outfit for them, or, if they had no such patronage, scanty opportunities grudgingly given might be granted them on ordinary conveyances. Even if such ac commodation were allowed them, their presence was looked upon as a nuisance : no general interest was felt in their objects ; it was much if they were permitted, on board some vessel, to have their bucket of specimens in a corner, which any sailor might kick over, unreproved, if it chanced to stand in his way. This ship, and the spirit prevailing in her com mand, opens to me a vista such as I never dreamed of till I stood upon her deck. Here* in place of the meagre chances I remember in old times, the facilities could hardly be greater if the ship had been built as a scientific laboratory. If any such occasion has ever been known before, if any naturalist has ever been treated with such consideration, and found such intelligent appreciation of his highest aims, on board a merchant-ship fitted up for purposes of trade, I am not aware of it. I hope the first trip of the Colorado will be re membered in the annals of science. I, at least, shall know whom to thank for an opportunity so unique. This voyage, and the circumstances connected with it, are, to me, the signs of a good time coming ; when men of different inter- VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 5 ests will help each other ; when naturalists will be more liberal and sailors more cultivated, and natural science and navigation will work hand in hand. And now for my lecture, — my first lecture on ship-board." The lecture was given, of course, specimen in hand, the various inhabitants of the branch of sea-weed giving their evidence in succession of their own structure and way of life. To these living illustrations were added drawings on the blackboard to show the transformations of the animals, their embryological history, £c.* Since the lecture, Captain Bradbury has fitted up a large tank as an aquarium, where any specimens taken during the voyage may be preserved and examined. Mr. Agassiz is perfectly happy, enjoying every hour of the voyage, as well he may, surrounded as he is with such considerate kindness. April OV/i.~~ Though I took notes, as usual, of the lecture yesterday, I had not energy enough to enter them in my journal. The subject was the Gulf Stream, — the stream itself this time, not the animals it carries along with it. Air. Agassiz's late observations, though deeply interesting to himself, inasmuch as personal confirmation of facts already known is always satisfactory* have nothing novel now-a- days ; yet the history of the facts connected with the dis covery of the Gulf Stream, and their gradual development, is always attractive, and especially so to Americans, on ac count of its direct connection with scientific investigations * The species of Hydroids most numerous upon the gulf-weed have not yet been described, and would form a valuable addition to the Natural History of the Acalephs. For an account of the animals of this class inhabiting the Atlan tic coast of North America, and especially the New England shores, I may refer to the third volume of my Contributions to the Natural History of the United States, and to the second number of the Illustrated Catalogue of the Museum of Comparative Zoology at Cambridge. — L. A. 6 A JOURNEY IN BRAZIL. carried ou under our government. Mr. Agassiz gave a slight sketch of this in opening his lecture. " It was Franklin who first systematically observed these facts, though they had been noticed long before by navigators. He recorded the temperature of the water as he left the American con tinent for Europe, and found that it continued cold for a certain distance, then rose suddenly, and after a given time sank again to a lower temperature, though not so low as before. With the comprehensive grasp of mind charac teristic of all his scientific results, he went at once beyond his facts. He inferred that the warm current, keeping its way so steadily through the broad Atlantic, and carrying tropical productions to the northern shores of Europe, must take its rise in tropical regions, must be heated by a tropical sun.* This was his inference : to work it out, to ascertain the origin and course of the Gulf Stream, has been, in a great degree, the task of the United States Coast Survey, under the direction of his descendant, Dr. Bache." f * " This stream," he writes, " is probably generated by the great accurau- ^ation of water on the eastern coast of America, between the tropics, by the trade-winds which constantly blow there." These views, though vagnely hinted at by old Spanish navigators, were first distinctly set forth by Frank lin, and, as is stated in a recent printed report of the Coast, Survey Explo rations, " they receive confirmation from every discovery which the advance of scientific research brings to aid in the solution of the great problem of oceanic circulation." t No one can read the account of the explorations undertaken by the Coast Survey in the Gulf Stream, and continued during a number of successive years, and the instructions received by the officers thus employed from the Superintendent, Dr. A. D. Bache, without feeling how comprehensive, keen, and persevering was the intellect which has long presided over this department of our public works. The result is a verv thorough survey of the stream, es pecially along the coast of our own continent, with sections giving the temper ature to a great depth, the relations of the cold and warm streaks, the form of the ocean bottom, a? well as various other details respecting the direction and VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 7 We are now fairly in the tropics. "The trades" blow heavily, and yesterday was a dreary day for those unused to the ocean ; the beautiful blue water, of a peculiar metallic tint, as remarkable in color, it seemed to me, as the water of the Lake of Geneva, did not console us for the heavy moral and physical depression of sea-sick mortals. To-day the world looks brighter; there is a good deal of motion, but we are more accustomed to it. This morning the lec ture had, for the first time, a direct bearing upon the work of tho expedition. The subject was, "How to observe, and \vhut are the objects of scientific explorations in mod ern times." " My companions and myself have come together so sud denly and so unexpectedly on our present errand, that we have had little time to organize our work. The laying out of a general scheme of operations is, therefore, the first and one of the most important points to be discussed between us. The time for great discoveries is passed. No student of nature goes out now expecting to find a new world, or looks in the heavens for any new theory of the solar system. The work of the naturalist, in our day, is to explore worlds the existence of which is already known ; to investigate, not to discover. The first explorers, in this modern sense, were llnmboldt in the physical world, Cuvier in natural hi>tory, Lavoisier in chemistry, La Place in astronomy. They have been the pioneers in the kind of scientific work characteristic of our century. We who have chosen Brazil as our field must seek to make ourselves familiar with its physical features, its mountains and its rivers, its animals and plants. There is a change, however, to be introduced force of the current, the density and color of the water, and the animal and vegetable productions contained in it. (Sec Appendix No. I.) — L. A. 8 A JOURNEY IN BRAZIL. in our mode of work, as compared with that of former investigators. When less was known of animals and plants the discovery of new species was the great object. This has been carried too far, and is now almost the lowest kind of scientific work. The discovery of a new species as such does not change a feature in the science of natural history, any more than the discovery of a new asteroid changes the character of the problems to be investigated by astrono mers. It is merely adding to the enumeration of objects. We should look rather for the fundamental relations among animals ; the number of species we may find is of impor tance only so far as they explain the distribution and lim itation of different genera and families, their relations to each other and to the physical conditions under which they live. Out of such investigations there looms up a deeper question for scientific men, the solution of which is to be the most important result of their work in coming genera tions. The origin of life is the great question of the day. How did the organic world come to be as it is ? It must be our aim to throw some light on this subject by our pres ent journey. How did Brazil come to be inhabited by the animals and plants now living there ? Who were its inhab itants in past times ? What reason is there to believe that the present condition of things in this country is in any sense derived from the past ? The first step in this investi gation must be to ascertain the geographical distribution of the present animals and plants. Suppose we first ex amine the Rio San Francisco. The basin of this river is entirely isolated. Are its inhabitants, like its waters, com pletely distinct from those of other basins ? Are its species peculiar to itself, and not repeated in any other river of the continent? Extraordinary as this result would seem, VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 9 I nevertheless expect to find it so. The next water-basin we shall have to examine will be that of the Amazons, which connects through the Rio Negro with the Orinoco. It has been frequently repeated that the same species of fish exist in the waters of the San Francisco and in those of Guiana and of the Amazons. At all events, our works on fishes constantly indicate Brazil and Guiana as the common home of many species ; but this observation has never been made with sufficient accuracy to merit confi dence. Fifty years ago the exact locality from which any animal came seemed an unimportant fact in its sci entific history, for the bearing of this question on that of origin was not then perceived. To say that any speci men came from South America was quite enough ; to specify that it came from Brazil, from the Amazons, the San Francisco, or the La Plata, seemed a marvellous accu racy in the observers. In the museum at Paris, for instance, there aro many specimens entered as coming from New York or from Pani ; but all that is absolutely known about them is that they were shipped from those sea-ports. Nobody knows exactly where they were collected. So there are specimens entered as coming from the Rio San Francisco, but it is by no means sure that they came exclusively from that water-basin. All this kind of investigation is far too loose for our present object. Our work must be done with much more precision ; it must tell something positive of the geographical distribution of animals in Brazil. There fore, my young friends who come with me on this expedi tion, let us be careful that every specimen has a label, recording locality and date, so secured that it shall reach Cambridge safely. It would be still better to attach two labels to each specimen, so that, if any mischance happens 10 A JOURNEY IN BRAZIL. to one, our record may not be lost. We must try not to mix the fishes of different rivers, even though they flow into each other, but to keep our collections perfectly dis tinct. You will easily see the vast importance of thus ascertaining the limitation of species, and the bearing of the result on the great question of origin. " Something is already known. It is ascertained that the South American rivers possess some fishes peculiar to them. Were these fishes then created in these separate water-systems as they now exist, or have they been trans ferred thither from some other water-bed ? If not born there, how did they come there ? Is there, or has there ever been, any possible connection between these water-sys tems ? Are their characteristic species repeated elsewhere ? Thus we narrow the boundaries of the investigation, and bring it, by successive approaches, nearer the ultimate question. But the first inquiry is, How far are species distinct all over the world, and what are their limits ? Till this is ascertained, all theories about their origin, their derivation from one another, their successive transforma tion, their migration from given centres, and so on, are mere beating about the bush. I allude especially to the fresh-water fishes, in connection with this investigation, oh account of the precision of their boundaries. Looking at the matter theoretically, without a positive investigation, I do not expect to find a single species of the Lower Amazons above Tabatinga.* I base this supposition upon my own ob- * This anticipation was more than confirmed by the result of the journey. It is true that Mr. Agassiz did not go beyond the Peruvian frontier, and therefore could not verify his prophecy in that region. But he found the localization of Bpecies in the Amazons circumscribed within much narrower limits than he ex pected, the whole length of the great stream, as well as its tributaries, being broken up into numerous distinct faunae. There can be no doubt that what is VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 11 seivations respecting the distribution of species in. the Euro pean rivers. I have found that, while some species occur simultaneously in the many upper water-courses which com bine to form the Rhine, the Rhone, and the Danube, most of them are not found in the lower course of these rivers ; that, again, certain species are found in two of these water- basins and do not occur in the third, or inhabit only one and are not to be met in the two others. The brook trout, for instance (^Salmo Fario), is common to the upper course and the higher tributaries of all the three river-systems, but does not inhabit the main bed of their lower course. So it is, also, and in a more striking degree, with the Salm- ling {Salmo Salvelinus). The Iluchen {Salmo Ilticho) is only found in the Danube. But the distribution of the perch family in these rivers is, perhaps, the most remark able. The ZingX'l (Axpro Zinyel) and the Schraetzer {Aeeri- na Selircetzer) are only found in the Danube ; while Accrina cernua is found in the Danube as well as in the Rhine, but not in the Rhone ; and Aspro asper in the Danube as well as in the Rhone, but not in the Rhine. The Sander {Lucioperca Sandra) is found in the Danube and the other large rivers of Eastern Europe, but occurs neither in the Rhine nor in the Rhone. The common perch (Perca flu- viatilis*), on the contrary, is found both in the Rhine and Rhone, but not in the Danube, which, however, nourishes another species of true Perca, already described by Schaeffer as Perca vulgaris. Again, the pickerel (Esoz Lucius) is common to all these rivers, especially in their lower course, and so is also the cusk (Lota vulyaris). The special dis- true for nearly three thousand miles of its course is true also for the head- waters of the Amazons ; indeed, other investigators have already described some spe cies from its higher tributaries differing entirely from those collected upon this expedition. 12 A JOURNEY IN BRAZIL. tribution of the carp family would afford many other striking examples, but they are too numerous and too little known to be used as an illustration here. " This is among the most remarkable instances of what I would call the arbitrary character of geographical dis tribution. Such facts cannot be explained by any theory of accidental dispersion, for the upper mountain rivulots, in which these great rivers take their rise, have no con nection with each other ; nor can any local circumstance explain the presence of some species in all the three basins, while others appear only in one, or perhaps in two, and are absent from the third, or the fact that certain species inhabiting the head-waters of these streams are never found in their lower course when the descent would seem so natural and so easy. In the absence of any positive ex planation, we are left to assume that the distribution of ani mal life has primary laws as definite and precise as those which govern anything else in the system of the universe. " It is for the sake of investigations of this kind that I wish our party to divide, in order that we may cover as wide a ground as possible, and compare a greater number of the water-basins of Brazil. I wish the same to be done, as far as may be, for all the classes of Vertebrates, as well as for Mollusks, Articulates, and Radiates. As we have no special botanist in the party, we must be content to make a methodical collection of the most characteristic families of trees, such as the palms and tree ferns. A col lection of the stems of these trees would be especially important as a guide to the identification of fossil woods. Much more is known of the geographical distribution of plants than of animals, however, and there is, therefore, less to be done that is new in that direction. VOYAGE FROM NEW YORK TO RIO DE JANEIRO. 13 " Our next aim, and with the same object, namely, its bearing upon the question of origin, will be the study of the young, the collecting of eggs and embryos. This is the more important, since museums generally show only adult specimens. As far as I know, the Zoological Museum at Cambridge is the only one containing large collections of embryological specimens from all the classes of the ani mal kingdom. One significant fact, however, is already known. In their earliest stages of growth all animals of the same class are much more alike than in their adult condition, and sometimes so nearly alike as hardly to be distinguished. Indeed, there is an early period when the resemblances greatly outweigh the differences. How far the representatives of different classes resemble one another remains to be ascertained with precision. There are two possible interpretations of these facts. One is that animals so nearly identical in the beginning must have been origi nally derived from one germ, and are but modifications or transmutations, under various physical conditions, of this primitive unit. The other interpretation, founded on the same facts, is, that since, notwithstanding this material iden tity in the beginning, no germ ever grows to be different from its parent, or diverges from the pattern imposed upon it at its birth, therefore some other cause besides a material one must control its development; and if this be so, we have to seek an explanation of the differences between animals outside of physical influences. Thus far both these views rest chiefly upon personal convictions and opinions. The true solution of the problem must 'be sought in the study of the development of the animals themselves, and embry ology is still in its infancy ; for, though a very complete study of the embryology of a few animals has been made, 14 A JOURNEY IN BRAZIL. yet these investigations include so small a number of repre sentatives from the different classes of the animal kingdom that they do not yet give a basis for broad generalizations. Very little is known of the earlier stages in the formation of hosts of insects whose later metamorphoses, including the change of the already advanced larva, first to the con dition of a chrysalis and then to that of a perfect insect, have been carefully traced. It remains to be ascertained to what extent the caterpillars of different kinds of butter flies, for instance, resemble one another during the time of their formation in the egg. An immense field of observa tion is open in this order alone. " I have, myself, examined over one hundred species of bird embryos, now put up in the museum of Cambridge, and found that, at a certain age, they all have bills, wings, legs, feet,