8 Memoirs of the Indian Museum. [Vou. IV, 
Gonodactylus chiragra.—Two individuals of this species bore on the under surface 
of the thorax and between the pleopods examples of E-pistethe gonodactyli, a 
hitherto unknown genus and species of Gastropod Molluse (Preston, Rec. Ind. 
Mus., vii, 1912, pp. 126, 127, text-figs.). 
Coutiére (1905) gives an interesting account of Lystosquilla diguett, a species which 
lives commensally along with a Polynoid in the burrows of Balanoglossus. 
The natives of Bengal for the most part classify marine animals according to the 
estimation in which they are held as articles of diet. For this purpose they consider 
Stomatopods worthless ; they term them chingri-pokd (prawn-insects) or darid-pokd 
(sea-insects) in contradistinction to chingri-muchli (prawn-fish), t.e. Penaeidae and 
Palaemonidae. It is, however, possible that they are used. for food in some parts of 
the Indian Empire: in the Museum collection is a large example of Squilla raphidea 
which was purchased in the market at Akyab in Arakan. 
Of the one hundred and thirty-nine species and varieties of Stomatopoda which are 
known ninety-seven have been found within the limits of the area dealt with in this 
paper, while fifty-four have been taken on the coasts of the Indian Empire and of 
Ceylon. 
The tables ' on pages 10 and 11 will give a general idea of the known distribution of 
the species in the Indo-pacific area. 
Only a very few forms found in this region have been discovered also in the 
Atlantic or on the West Coast of America :— 
Squilla armata Ae .. Chili and Patagonia. 
Pseudosquilla ciliata .. Florida, Bermuda, Porto Rico. 
Pseudosquilla oculata .. Canaries, Madeira. 
Pseudosquilla stylifera .. California. 
Lystosquilla maculata .. West Indies. 
In addition Lysiosquilla biminiensis, represented in the Indo-pacific by the form 
pacificus, is found at the Bimini Islands, Bahamas, and the Atlantic Gonodactylus 
oerstedi is so closely allied to the Indo-pacific G. chivagra that some will perhaps 
prefer to regard it merely as a Subspecies. 
The figures on page 12 are intended to elucidate some of the terms employed in 
this memoir which might otherwise prove confusing. In such matters as the nomen- 
clature of the various carinae of the carapace, abdomen and telson no exact unifor- 
mity is to be found in the literature and I have consequently adopted those which 
appear to be most suitable. 
The form of the eye is often of great importance in systematic work. The 
relation of the corneal and peduncular axes, whether at right angles or oblique, 
affords a valuable criterion and scarcely calls for any explanation (see Bigelow, 1894, 
text-fig. 14, p. 522). In certain species, more particularly in the case of the closely 
' It will be noticed that the divisions into which the ‘Indo-pacific area has been grouped for the 
purposes of this table are by no means equal. But the majority of the specimens comprised in the 
collection under examination are from Indian localities and it has been thought best to give the distribu- 
tion on these coasts in somewhat fuller detail. 
