818 
THE VOYAGE OF H.1M.S. CHALLENGER. 
with sessile eyes, and a rounded body, but with rostrum _ and spines and five pairs of 
schizopod feet, in addition to the mouth parts and antennae. This passes into a form like 
the youngest Erichthus figured by Faxon, and from this point onwards there are two 
quite distinct lines of development, each of which is represented in the collections by 
larvae of two or more species. One line leads through the Erichthus, Erichthoidina, and 
Squil 1 erichthus stages to the adult, and is, in all probability, the primitive or ancestral 
mode of development, while the other line presents a much more accelerated history, and 
leads from the Erichthus stage to a Squilla-like form, very similar to the Alima larva,. 
“ The Alima type of development is also represented by two series, each of which is 
represented in the collections by the larvae of several species. I have not yet been able 
to study this type thoroughly, Jbut one series is much more accelerated, and less like 
the Erichthus type than the other.; and the collections seem to show that the abridged 
metamorphosis has been produced by' modification of the more primitive and ancestral 
Erichthus series. 
“ I think too that the collections prove that the Squilla larva is a modified Protozocea, 
and that the Stomatopods and Decapods have had a common origin. They also furnish 
several examples of the disappearance and subsequent re-development of appendages in 
the course of the metamorphosis.” 
Juan Fernandez. 
On the 13th November, at 9 a.m., the island of Juan Fernandez was sighted ahead, 
and the vessel passed round its east point at 4.30 p.m., anchoring in Cumberland Bay 
at 6 p.m. in 30 fathoms, with the point on the N.W. side of the bay N. 36° W., Fort 
Flag S. 70° W., and the left extremity of the land N. 80° E. 
The island of Juan Fernandez, 1 sometimes called “Mas-a-tierra” by the Spaniards, was 
discovered by a Spanish pilot of that name in 1563, as was also the island of Mas-a-fuera, 
90 mil es to the westward. The discoverer obtained from his Government a grant of the 
island, on which he resided some time importing goats and pigs, but he afterwards 
abandoned his possession. It was however frequented by Spanish -fishermen from the 
coast of Peru shortly after its discovery, as the sea in its neighbourhood was found to be 
well stocked with fish of all kinds. 
In 1616 Le Maire and Schouten called at Juan Fernandez on their voyage round the 
world, and laying to off its west side, watered their ships and caught numerous fish, 
principally Bream. At this time there were both goats and pigs on the island. 
On April 4th, 1624, the Nassau fleet, under the command of Admiral Jacob 
1 Burney's Voyages, vol. i. p. 274, London, 1803 ; Proc. Geogr. Soc.; Naut. Mag. ; Voyage of Capts. Edward Cooke 
and Wood.es Rogers ; Ulloa’s Voyage to South America ; Noticia Secretas de America ; Morrell's Voyage ; History of 
Chili, by Ignatius Molina, &c. 
