BARBADOS-ANTIGUA REPORTS 15 



which the two outer are united by syzygy, the following 

 of three of which the two outer are united by syzygy; 

 sometimes the division series are very irregular; the 

 first pinnule following the outermost axillaries is on the 

 first brachial 



Nemaster 

 d- ten arms 



el cirri short and stou* with the dorsal profile smooth, there 

 being no processes on the distal ends of the segments; 

 the segments of the middle pinnules are short and broad, 

 with the distal corners more or less produced 



Comactinia 



e- cirri longer and more slender, the outer segments bearing 

 more or less prominent processes on the dorsal side of 

 the distal ends 



fi the three pairs of pinnules following the first pair 

 on each arm are absent 



Comatilia 

 t- all of the pinnules are present 



gi first and second segments of the proximal pin- 

 nules with a very high and prominent carinate 

 process of which the outer edge, at least on the 

 second segment, is parallel with the longitudinal 

 axis of the pinnule 



Leptonemaster 



g- there are no carinate processes on the basal seg- 

 ments of the proximal pinnules 

 hi cirri slender, but not excessively so; terminal 

 comb arising at about, or even within, the 

 proximal third of the pinnules of the first 

 pair, composed of exceptionally large 

 rounded teeth which usually much exceed in 

 height the lateral diameter of the segments 

 which bear them, and frequently absent; 

 4th-7th brachials with prominent spinous 

 median knobs or keels; usually one or more 

 of the earlier segments of Pi is twice as long 

 as broad, or even longer; size moderate 



Comatonia 



h2 cirri excessively slender and threadlike, the 

 enormously elongated segments with greatly 

 swollen articulations; the penultimate seg- 

 ment, which is much shorter than those pre- 

 ceding, is twice as long as broad; terminal 



