CEEVINIA. 85 



12) in the female having the inner branch very short, 

 and beset with a few short transverse rows of minute 

 setae ; those of the male (fig. 11) largely developed, 

 each formed apparently of two modified 3-jointed 

 branches, the outer branch on each side forming a 

 strong terminal spine, and on the right having also a 

 very large falciform claw ; the remaining processes form 

 a number of irregular laciniated plates. Abdominal 

 segments short ; caudal segments scarcely twice as 

 long as broad; the longest tail-seta about equal in length 

 to the abdomen. Length y^rd of an inch ('77 mm.). 



P. obtusatus was taken, rather sparingly, by my 

 friend Mr. David Robertson and myself in the surface- 

 net during a moonlight cruise in Roundstone Bay, 

 in July 1871. We have more recently found three or 

 four specimens in a dredging made off the Island of 

 Cumbrae in the Firth of Clyde, and others in washings 

 of Laminaria from Mulroy Lough (Donegal). 



Genus 3. CEBVINIA, Norman, MS. 



Body cylindrical, head small, united with first 

 thoracic segment; abdomen 5-jointed, distinct from 

 thorax; caudal segments elongated. Anterior an- 

 tennae short, 7-jointed ; posterior larger, 3-jointed, 

 the basal joint large and bearing a 4-jointed secondary 

 branch. Mandible palp large, 2-branched; maxillar 

 palp composed of two digitiform segments. Anterior 



