8o REPORT OF NEW JERSEY STATE MUSEUM. 



two-thirds long as terminal one, with comb of remarkably long- 

 teeth near tip. These teeth longest distally, decrease in length 

 towards base of claw. Terminal caudal seta half as long as 

 subterminal claw. Dorsal seta very slender, nearly four times 

 width of ramus fromi subterminal claw, upwardly cuiwed, not 

 larger than ramus width, situated slightly above center of ramus. 

 Entire shell smooth, sparsely hairy except at end. Color brown- 

 ish-yellow, with dark brown markings as follows : An anterior, 

 a ventral and a dorso-ventral patch, and a vertical stripe dorsally 

 just posterior to eye-spot. Muscle impressions in form of 

 rosette, closely clustered, six or seven in number. Length 0.69 

 mm. ( Sharpe. ) 



Remarks. — Originallv described from Cincinnati in Ohio, it 

 has since been recorded by its describer from Westfield. in New 

 Jersey. 



Order COPEPODA. 



The Copepods. 



Crustacea of small size, with distinctly segmented elongated 

 body, except in degenerate parasitic forms. Body never enclosed 

 in a bivalve shell, but usually elongated cylindrically in form, 

 and composed of two subdivisions. A few forms resemble 

 shelled Crustacea, in prolonged and expanded dorsal shields. 

 Cephalothorax, or anterior portion of body composed of ten 

 somites, and these often more or less united, or fused. Five 

 of these segments form the head and appendages as follows. 

 First as pair of several-jointed to many-jointed antennre. never 

 primiarily senso^ry in function, though often pro voided with sense- 

 hairs or other like organs. Second as pair of two-branched an- 

 tennules, sometimes alm.ost simple or prehensile. Third a pair 

 of mandibles in form' of masticator}'- or piercing organs, and 

 these usually furnished with a palp. Fourth as pair of maxillae 

 of various form and function. Fifth as pair of maxillipeds, 

 which not infrequently subdivide in later life to form what 

 appear to be two distinct pairs. Five thoracic segments each 



