igi3-] S. Kemp : Crustacea Stomatopoda of the Indo-Paciflc Region. 7 



also in all probability an adaptation to this special mode of life, and it may be noticed 

 that among the Decapoda the attachment of the branchial plumes to the swimmerets 

 is known in one aberrant genus, Callianidea, the species of which also appear to make 

 burrows. 



It is to be regretted that so little is yet known of the habits of the Indo-pacific 

 Stomatopoda. Brooks' brilliant researches on a few Atlantic species and Giesbrecht's 

 more recent investigations of the Mediterranean forms have supplied information of 

 great value, but no complete account of the life-history of any Indo-pacific species 

 has yet appeared. While it is probable that most of the Squillidae have their own 

 specific idiosyncrasies, it seems almost certain that there are certain broad distinc- 

 tions in habits between at least some of the different genera of the family. Squilla 

 appears to prefer a bottom of mud, sand, or sand and shells, and though it evidently 

 constructs burrows it must often wander from them, for it is constantly captured in 

 the light nets used by fishermen on different parts of the Indian coast. Lysiosquilla 

 on the other hand is in my experience very rarely found, though in reality it may 

 perhaps be quite abundant. The species of this genus seem to live in deep burrows 

 which they leave only on rare occasions, and to this fact may be attributed the 

 scarcity of specimens in collections and the large number of forms which are known 

 only from single individuals. The species of the genera Pseudosquilla , Odontodactylus 

 and Gonodactylus seem for the most part to inhabit rough ground ; they are often 

 found in abundance on oyster-beds and on coral reefs. Brooks has observed that 

 the Atlantic Gonodactylus oerstedi burrows into solid coral or limestone rock and it is 

 probable that the same is the case with the Indo-pacific species of the genus. L The 

 members of the genera Pseudosquilla and Odontodactylus possibly have similar habits, 

 but of this nothing is known. 



It is only in very rare instances that other living organisms are found attached 

 to Stomatopoda, but five different forms, recently identified and recorded by Dr. N. 

 Annandale and Mr. H. B. Preston, have been discovered 011 material in the Indian 

 Museum. 



Squilla holoschista. — Several small undeterminable Balani were found attached 



to the dorsal surface of the carapace {Annandale, Rec. Ind. Mus., vii, 1912, 



p. 124). 

 Squilla sp.* — A few immature barnacles of the genus Dichelaspis (probably 



D. warwickii) were found attached to the pleopods ( Annandale, loc. cit., p. 124). 

 Squilla investigator is. — On the telsons of two of the type specimens of this species 



colonies of Platypolyzoon investigatoris , a new genus and species of Polyzoon, 



were obtained [Annandale, loc. cit., pp. 124 — 126, text-fig.). 

 Squilla fasciata. — On the carapace, raptorial claws and telson of a specimen 1 ent 



us by Prof. K. Kishinouye, colonies of the Polyzoon Triticella korenii, G. O. 



Sars, were found (Annandale , loc. cit., p. 124). 



1 See addendum, p. 197. 



% The specimen was laid aside, prior to identification, and could not subsequently be discovered. 



