ASCIDICOLA. 147 



Maxillae and foot-jaws small, short and broad, adapted 

 for grasping. Feet small, first four pairs two-branched. 

 No external ovisac. Abdomen very small. 



Genus 1. ENTEROCOLA, Van Beneden (1861). 



Head distinct from thorax ; anterior antennae simple, 

 two-jointed, posterior one (?) -jointed. Mouth-organs 

 minute, rudimentary. Posterior foot-jaws larger, 2- 

 jointed and having a rudimentary palp. Four pairs 

 of feet, short, two branched, much like the antennae 

 in general appearance ; abdomen rudimentary, bifid. 



The mouth-organs, especially, of this genus seem to 

 require more minute examination. The animal is of a 

 sedentary and degraded type, very like in general ap- 

 pearance, as M. van Beneden remarks, to some of the 

 Tardigrada. I have not myself seen any perfect speci- 

 mens, and though, in deference to Dr. Claus' opinion, 

 associating it with Buprorus, I must confess some 

 doubt as to whether this may ultimately be found to 

 be its proper position. M. van Beneden has not 

 given any precise definition of the genus, but the 

 foregoing is condensed so as to embody what appear 

 to me the most important points of his description. 



1. ENTEROCOLA ERUCA, Norman. 



Enterocola eruca, Norman. Last Shetland Dredging Report, 

 p. 300 (1868). 



" Allied to Enterocola fulgens, Van Beneden (' Re- 



