SHIZOPOD.^. 55 



Ei/es large and conspicuous from their dark blue centre. 



AntenncE two pair, the inner and superior pair with 

 three robust basil joints, and terminated by two long mul- 

 ti-articulate hairy setae, the outer and inferior pair on a 

 basis of but two joints, ending in a single seta, similar and 

 nearly as long as those of the fonncr ; at their base, an 

 elongated taper scale (particular form not determined) 

 tufted at the extremity. 



Thoracic members eight pair, long, filiform and ciliate 

 within. 



Sub-ahdommal members five pair, each, of three articula- 

 tions, the first clavate, and the terminal one ciliate— there 

 are to be seen between the thoracic and abdominal mem- 

 bers, some obscure processes in constant and rapid motion, 

 these are no doubt the indications of the natatory division 

 of the posterior thoracic members. 



The motions of this animal were observed to be lively, 

 and it gave out brilliant scintillations in the dark when 

 disturbed. It was perfectly transparent, tinged here and 

 there with orange-red, particularly its anterior feet, and 

 showed the circulation most distinctly. 



Genus 2. 



Cynthia. 



It may be objected, that this appellation has been already, 

 appropriated by Mons. Savigny to the most common and 

 familiar type of the Ascidiae, a name, which most Zoologists 

 are more likely to retain, with every respect for that very 

 eminent Naturalist ; I therefore beg to apply it where it is 

 more likely to remain undisturbed, and where it indicates 

 the affinity which exists with the other luminous Genera of 

 the Shizopodae. 



As I have just stated, the efforts made to procure females 

 of the former Genus, led to the discovery of the present 

 type, which bears a considerable resemblance both to Mysi» 



