G-. M. Thomson. — On the New Zealand Copepodi. 95 



(P.S. — The generie name Boeckia was, I find, originally proposed by 

 Dr. Brady for a species of Lichomolgus (L. arenicolus), but as it has lapsed 

 for that species, it may stand for the above. In suggesting it, I was quite 

 unaware that it had been already employed). 



Fain. CYCLOPICvE. 

 G-enus Thorellia, Bocck. 



Body expanded in front, tapering posteriorly. Anterior antennae many- 

 jointed, much shorter than cephalothorax ; posterior pair 4-jointed, without 

 a secondary branch. Mandibles dilated at the extremity ; palp tubercular, 

 bearing two filaments. Maxillae bearing several strong apical teeth and 

 marginal setae. First pair of footjaws 4-jointed, slender, armed with 

 long marginal spines and setae. Second pair 4-jointed, prehensile, 

 terminating in two hooked claws. First four pairs of feet 2-branched, 

 each branch 3-jointed. Fifth pair rudimentary, reduced to a single 

 branch. 



1. Tlwrellia, brunnea, Boeck, var. antarctica. PL V., figs. 15-19. 



Cephalothorax as broad as long, rounded in front ; rostrum short, 

 obtuse. Segments of thorax rounded at the sides, much broader than long ; 

 abdomen very long and narrow. Anterior antennae about two-thirds as 

 long as cephalothorax, 21-jointed, first joint the largest, as broad as long, 

 next 8 much broader than long, 11th to 19th about as broad as long, 20th 

 longer, and last about twice as long as broad ; the first about three times 

 as broad as the last ; setae numerous on the first nine joints. Posterior 

 antennae 4-jointed, about half as long as the anterior pair. Mandible with 

 numerous teeth on the dilated apex. Anterior footjaws 4-jointed, bearing 

 numerous curved spines and setae ; 3rd joint with a branched appendage. 

 First four pairs of feet furnished with peculiar lancet-shaped spines on the 

 outer margins and extremities ; fifth pair with a minute basal joint ; second 

 joint elongated, with one lateral and two terminal spines. Caudal setae 

 densely plumose ; middle one as long as the abdomen ; outer about three- 

 fourths as long. 



Colour — semi-transparent, except the caudal segments which are tinged 

 with dark red. . Length (including caudal setae) T X T inch. 



Hob. Dredged in Otago Harbour in 7 fathoms. 



This differs from the figure of Tlwrellia brunnea in Brady's Monograph 

 (vol. i., pi. 16) in a few immaterial points. The anterior antenna is not 

 so continuously setose throughout its length, and the fifth pah' of feet has 

 three long simple spines, in place of the lancet-shaped spines figured by 

 Brady. In all other respects, except colour (which is a varying feature of 

 no value in this species), our form agrees with the common European 

 one. 



