I4 Memoirs of the Indian Museum. [VoL TV; 
Keys have been provided to facilitate the determination of the species. Those 
of Pseudosquilla, Coronida, Odontodactylus and Gonodactylus embrace all species 
hitherto known, but those of Sgutlla and Lystosquilla have reference only to the 
Indo-pacific forms. 
In the course of the preparation of this report I have received much assistance 
from museums and institutions in other countries. Through the good offices of Dr. 
W. T. Calman I have obtained from the Trustees of the British Museum the loan of 
a most valuable series of Squil/a belonging to the S. nepa and S. oratoria groups. 
In many other matters also I am under a great debt of obligation to Dr. Calman ; he 
has always been ready to place his very special knowledge of Crustacea at my dis- 
posal and he has spared neither time nor trouble in obtaining for me particular 
items of information from the collections in his charge. To Mr. J. C. Moulton I am 
indebted for the loan of a small but very valuable collection from the Sarawak 
Museum. Mr. T. Southwell has kindly presented us with a fine series of Stomatopoda 
from the Ceylon pearl banks, and I wish also to thank Dr. Pearson for sending me, on 
loan, the entire collection in this group from the Colombo Museum. 
It is probable that before this paper is published Mr. Patience’s account of the 
Stomatopoda collected in Portuguese E. Africa and the Mergui Archipelago by 
Messrs. Simpson and Rudmose Brown, will have appeared. Mr. Patience has kindly 
sent me examples of nearly all the species of the order which he had in his 
hands, and in so doing he was good enough to give me permission to make any 
reference to them that I desired. In addition I have received specimens of several 
scarce and interesting species from Prof. Kishinowye, Dr. Chilton, Mr. David Stead 
and Mr. Alan Owston and, through the kindness of Mr. Doncaster, I have been 
enabled to examine the type specimens of Coronida (Squilla) multituberculata. 
In India itself I have been fortunate in obtaining the co-operation of the Bombay 
Natural History Society, which, in past years, has been instrumental in acquiring for 
us many species of crustacea from the west coast of India, and, in addition to the 
members of the staff of the Indian Museum, Mr. J. Hornell at Tuticorin and Mr. T. 
H. Hill at Cuddalore and Porto Novo have both made special collections on my behalf. 
The plates illustrating this memoir are issued as ‘‘ Illustrations of the Zoology of 
R.I.M.S.S. ‘Investigator.’ ’’ The figures were all drawn under my supervision by 
Babu S. C. Mondul, Artist to the Marine Survey. The care which he has taken in 
this work and the fidelity of his delineation has, I feel, added materially to the value 
of the report. 
Unless otherwise stated the type specimens are preserved in the Indian Museum. 
