34- Family Ceyloniidae nov. 



The body is rather slender and cylindrical and resembles Cletodes in general appearance. 

 The abdomen is four-jointed in the female, and five jointed in the male. The antennules are 

 comparatively short and seven-jointed in the female. The antennules of the male are prehensile. 

 The exopodite of the antennae is small and one-jointed. The mandibles, maxillae and first 

 pair of maxillipedes are similar to those of Cletodes. The second pair of BBRsflTTpedes is 

 extremely rudimentary and non-prehensile. The first four pairs of feet are very short. The 

 exopodites are three-jointed. The endopodites are two-jointed and shorter than the exopodites. 

 The fifth pair of feet of the female is foliaceous and two-jointed. The male fifth pair consists 

 of a single plate. 



The type of this family is Ceylonia armata (Claus). This Harpacticoid is readily 

 recognised by the very rudimentary mouth organs, but more especially by the non-prehensile 

 second pair of maxillipedes. This pair consists of flattened triangular plates without articulated claw. 



Genus Ceylonia Thompson and Scott, 1903. 

 = Jurinia Claus, 1866, a name preoccupied by DESVOIDV (Diftera), 1830. 



The body is rather slender and cylindrical, with no sharp distinction between the 

 anterior and postenor divisions. The cephalic segment is of moderate size and is provided 

 with a small rostrum. The antennules are short and seven-jointed in the female. The last joint 

 of the endopodite of the antennae is furnished with six short and very stout spines. The 

 exopodite is small and one-jointed. The mandible has very few teeth. The palp is short and 

 is indistinctly two-jointed. The maxillae consist of a biting part and one small lobe. The 

 first pair of maxillipedes is furnished with two digitiform lobes and a terminal claw-bearing 

 joint. The second pair of maxillipedes is very rudimentary and consists of a thin wedge-shaped 

 non-prehensile plate which terminates in a rudimentary curved claw. The claw is not articulated. 

 The exopodite of the first pair of feet is short and three-jointed. The endopodite is two- 

 jointed and is shorter than the exopodite. It terminates in a moderately strong spine. The 

 exopodites of the second, third and fourth pairs of feet are slender and three-jointed. The 

 endopodites are two-jointed and are shorter than the exopodites. The fifth pair of feet of the 

 female is moderately large and foliaceous, and is two-jointed. The proximal joint has the inner 

 portion considerably expanded. The male fifth pair is also foliaceous, but there is no tracé of 

 a division. 



This genus was established by the late I. C. Thompson and the writer in the report 

 on the Ceylon Copepoda collected by Professor Herdman in 1903. We were unaware that 

 Claus established the genus Jurinia in 1866, for a Copepod identical with the one described 

 by us as Ceylonia aculeata. The name adopted by Claus, however, had already been used 

 by Desvoidv in 1830, and must necessarily lapse. 



The genus is at present represented by a single species. Specimens belonging to it 

 were found in the material collected by the 'Siboga' in the Malay Archipelago. 



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