294 



CEYLON PEARL OYSTER REPORT. 



Caligus benedeni, Bassett-Smtth. 



Found attached to the inner surface of operculum of Sciama diacanthus from Palk 

 Strait, Ceylon. 



Lepeophtheirus thompsoni, Baird. 



Found associated with Caligus dakari in the mouth of Arius venosus 

 from Palk Bay, Ceylon. 



Family : < 'HONDRA< AXTHTD.E. 



Chondracanthus cornutus, MCller. 



One only was taken from the gills of Cynogl-ossus oligolepis, from 

 Ceylon. 



Chondracanthus cynoglottidis, n. sp. — Text, fig. 1. 



Length, female 4'G5 millims. (excluding ovisacs); male unknown. 

 Head rounded, 2-lobed, as wide as the widest part of the body. 

 Body constricted for about ^ of its length, when it expands in width, 

 again narrowing towards the posterior end, and terminating in short 

 strong spines. Anterior antenna? unjointed, about 3 times as long as 

 broad. Posterior antennae consist of 2 gracefully curved spines. Two 

 pairs of lateral prolongations (rudimentary appendages), having on 

 under side of each a small rounded tubercle, spring from the constricted 

 part of the body. A pair of long wide ovisacs, equalling in length the 

 entire animal, are attached to the posterior end. 



Specimens were found attached to the nasal ccecum in Oynoglossus 

 brachyrhynchus and C. breoirostris by Mr. J. Johnstone, who obtained 

 for us this series of 11 fish-parasites while examining the collection of Ceylon fishes in 

 the Zoological Department of Liverpool University. 



Fig. 1. 

 Clio/idraainthn 

 cyno ; 



Family : LERN.FOPODII >_E. 

 Brachiella thynni, Cuv. 

 Attached to gills of Chirccentrus clorcib, from Palk Strait. 



Brachiella merluccii, Bassett-Smith. 

 From grooves underneath the head of Scicena diacanthus from Palk Strait. 



Anchorella uncinata, Mullee. 

 Found under head in the folds of operculum of Gazza (vqauheformis from Palk Bay. 



