ZOOLOGY OF FERNANDO NOEONHA. 
559 
also to have more numerous ridges. The thorax is not much 
broader than the abdomen, and the margin does not extend much 
beyond the feet. 
Machilis, sp. 
A single specimen of a very small brown Machilis was taken 
under a stone at the base of the Peak ; but, by an accident, the 
specimen was destroyed, and we met with no others. 
SfilRA HTJSARITM, n. Sp. 
Minuta, gregaria, in vita metallica, 1 mm. longa. Caput rotun- 
datum, hispidum ; oculi in maculis nigris fascia obscura ssepe 
connectente. Antennae broviusculae, violaceae, hispidse ; articulo 
basali brevissimo, secundo et tertio subsequali basali duplo longi- 
oribus ; articulo quarto triunciali, longissimo. Collum distinc- 
tum. Segmentum secundum corporis (prothorax) latum, mar- 
ginibus rotundatum ; tertium brevius, quartum multo brevius, 
quintum longius, sextum quinto subrequale, septimum sexto triplo 
longius, terminalia brevia. Corpus in speciem ferine glabrum, 
insquamosum, flavescens, segmentorum basibus et marginibus 
cseruleo-purpureis. Pedes hispidi, primi breviusculi, secundi 
longiores, tertii longissimi, graciles. 
Very abundant between the wet bases of the petioles of the 
bananas, at the base of the Peak. 
It is very nearly allied to S. BusJcii, Lubb., which was de- 
scribed from specimens found in a hot-house in England, and pro- 
bably introduced with tropical plants. It differs in the absence 
of hairs round the neck and on the body, longer hind legs, and 
also in coloration. The spring resembles that of 8. BusJcii, and 
is rather hispid. The neck is very distinct. These small Col- 
lembola have been much neglected bv collectors, and it is most 
probable that this species was introduced in the bananas. 
ECHIHQDERMATA*. 
There were not many species of Echinoderms found on the 
island, but the following were obtained: — 
ClDAEIS TRIEULOIDES, LamJc. 
Very plentiful on the north side of the island in coral-reef 
pools, near Sambaquichaba and Morro do Chapeo. 
* The species were determined for me by Prof. Jeffrey Bell. 
