INTRODUCTION. 
viii 
Many species of Idotea and Iara would appear to inliabit the sea-weed along the shores, as 
well as that found floating on the high seas. At the island of Quelpart, I found a large and 
singular species in considerable numbers in the former situation, and in the Sea of Celebes 
I met. with several new forms among algae far from land. OIF Tampassook in Borneo, to 
which island we again returned, several Ixa: were obtained by the dredge, one of which (our 
I. meyaspis ) was new to science ; they inhabit very deep water, and are inactive and feeble. 
Near the same part of the coast several specimens of Parthenope, which simulated death 
when taken, and species of Larnhrus and Arcania, which have similar habits, likewise were 
obtained from a rocky bottom by means of the dredge. Off Balambangan, our new genus 
Ceratocarcinus was procured from twelve fathoms water ; and at Unsang, on the east coast, 
another new genus, our Cosmonotus, was dredged among the clear sandy pools within the 
reef-barrier, which extends along a part of the coast ; and near the mouth of the Pantai River 
a third new genus, our Zebrida, rewarded our research, the habits of which Crustaceans are 
alluded to in the following pages. On the return of the Samarang across the Atlantic, at 
which we have now arrived, Erichthi and Aiimce, with their spiny carapaces and elongated 
abdomens, were obtained, by trawling, in large numbers, swimming in an erratic manner on 
the surface when the water was calm. Among the vast quantities of Acalephce which 
became entangled in the trawls, were several containing living Phronima, which, on being 
extricated, swam freely about. Here also was obtained, at the same time as Nemickt/iys of 
Richardson , 1 our new genus Bhabdosoma, which swims by suddenly straightening its body 
when in a bent position, moving either backwards or forwards ; it is sluggish in its move- 
ments compared with other Hypericida. The Phyllosomata, diaphanous and sluggish of 
movement, were frequently assembled during this calm by many thousands on the surface 
of the Atlantic, and, together with numbers of anomalous Zocea, afforded ample amusement 
during the protracted passage. Among the Entomostracous Crustacea, several specimens of 
Cypridince of large size [C. Adamsii, Baird 2 ) were obtained, as they were revolving and 
darting about the surface. The specimens described and figured in the following pages are 
deposited in the British Museum. A. A. 
1 Vide Dishes, PL X. Fig. 1. 
2 Ann. and Mag. Nat. Hist., 2nd Ser., vol. i. p. 21. 
