n8 Records of the Indian Museum. [Vol. XXIV, 



On Crinoidea. 



Palaemonella pottsi (Borr.), on Comanthus. 



, , affinis Zehntner, on Actinometra. 



" Palaemonella oricntalis Dana," de Man. 

 Periclimenes brocketti Borr. 



,, ceratophthalmus Borr. 



,, cornutus Borr. 



,, commensalis Borr., on Comanthus. 



Pontoniopsis comanthi Borr., on Comanthus 



In MOIJvUSCA IvAMEWJBRANCHIATA. 



In Pinna. 



Anchistus inermis (Miers). 

 ,, miersi (de Man). 

 Pontonia tyrrhena (Petagna). 

 „ pinnae L/Ockington. 

 Conchodytes biunguiculatus (Paulson). 

 „ domestica (Gibbes). 

 In Tridacna. 



Anchistus miersi (de Man). 

 ,, biunguiculatus Borr. 

 ,, spinuli / erus (Miers). 

 ,, mirabilis (Pesta). 

 „ demani, sp. nov. 

 Conchodytes tridacnae Peters. 

 ,, meleagrinae Peters. 



In Meleagrina. 



Anchistus miersi (de Man). 

 Conchodytes meleagrinae Peters. 

 In Margaritophora. 



Pontonia margarita Smith. 

 In Pecten. 



Conchodytes domestica (Gibbes). 

 In Spondylus. 



Anchistus miersi (de Man). 

 In " clamp-shells." 



Pontonia brevirostris Miers. 



In Ascidiacea. 



Pontonia flavomaculata Heller, in Phallusia, Diazo- 

 na and Ascidia. 

 ,, ascidicola Borr. 

 „ okai, sp. nov., in Ascidia, 

 ,, anachoreta, sp. nov., in Polycarpa. 



I have been able to include in this paper brief colour descrip- 

 tions of a number of species which I have observed in the living 

 state. Most of these are based on notes made at Port Blair in the 

 Andaman Is., where the Pontoniid fauna is one of unparalleled 

 richness. Though the colour pattern cannot as a rule be used in 

 taxonomic work, there is no doubt that it is often of specific value 



