86 
In the type species of the genus, Geoligia simoni from 
Venezuela, only the outer branch of the uropod was present, 
and it is non-articulate. The articulation of the branches of 
the uropods in G. perkinsi, if it really occurs, would, as far 
as I know, be the only instance in the family and should be 
supported by stronger evidence than that at present existing, 
for this appears to be based on a single specimen in which the 
uropods had possibly been injured. 
Addenda: From the facts given above I was quite convinced that 
Geoligia perkinsi Dollfus was identical with Ligia exotica Roux, but for 
complete confirmation of this conclusion it was necessary to prove that 
L. exotica extends to heights above sea level comparable to those recorded 
for Geoligia perkinsi. Through the kindness of Mr. O. H. Swezey this 
proof is now supplied. I have just received two specimens collected by 
him at the base of leaves of Astelia plants at ‘‘Summit Camp,’’ Kauai, 
at an altitude of 2000 feet. These two specimens are quite the same as 
those found near the seashore and are certainly Ligia exotica. The 
uropoda are detached from the body, but fortunately two complete 
uropoda are in the tube and these have the branches uniarticulate and 
agreeing closely with the description I have given for the Lake Chilka 
specimens of Ligia exotica. Mr. Swezey has also sent me two other 
specimens from Kauai collected by Mr. J. A. Kusche at an altitude of 
4000 feet. These prove to be also Ligia exotica, fortunately having two 
uropods present with the uniarticulate branches usual in that and other 
species and showing no sign of the articulation described for Geoligia 
perkinsi. These specimens show that Ligia exotica occurs as a terrestrial 
species in the Hawaiian Islands up to an altitude of 4000 feet and con- 
firm my conelusion that Geoligia perkinsi is the same species and that 
the articulation of the branches of the uropods described by Dollfus was 
based on a damaged specimen. Moreover, this is not the only ease where 
a species of Ligia commonly found on or near the seashore extends to 
considerable altitudes, for in Lord Howe Island Ligia australiensis, which 
is common on the seashore in the eastern parts of Australia, occurs in 
fresh waters up to a height of 700 feet. Similarly in the Juan Fernandez 
Islands the shore amphipod Orchestia chiliensis is also found at altitudes 
of 1500 feet; in the Hawaiian Islands Orchestia platensis is found from 
the seashore up to very considerable heights, and numerous other exam- 
ples of the same kind could be given. 
(Dr. Charles Chilton, Canterbury College. June 20, 1922.) 
