mo.1653. PACIFIC COAST C0PEP0D8 — WILSON. 4(;;i 



Colm. Body and chitinous horns ;i rich cinnamon brown tinged 

 with yellow: egg strings and soft horns a cream yellow. 



(r'mr/nittitiis. having <>r wearing curls, in allusion to the coiled egg 

 strings.) 



The head and neck with all the anchor horns arc buried in the 

 (issues of the eye of the host, leaving simply the genital segmenl 

 and egg foils visible on the exterior. The bend in the neck' comes 

 jil-t at the outer Surface of the eye and is no douht caused by the 



friction of the water against the genital segmenl of the parasite 

 as the flounder moves forward through the water and mud. The 

 ti--ites of the eye iii immediate contact with the head and neck of 

 the parasite are hardened into a sort of cyst which increases the 

 firmness of the parasite's hold, bul of course renders the eye wholly 

 blind. Whether the parasite ever infest- both eye- of the same fish 

 so as to render it totally blind is an interesting economic question 

 which must be left to future observation to answer. 



This new genus bears most resemblance to Havmobaphes^ hut differs 

 from it in many important particulars. The head in Hcemobaphes is 

 without horns, while here it is supplied with six comparatively large 

 one-, two pairs of which are chit ii mus like those on Lerncea. Again, 

 the neck in Hcemobaphes is bent abruptly at an acute angle a little 

 distance in front of its center, so that the head is brought hack against 

 the base of the neck: here the hemline- is simplj at a right angle and 

 at the very base of the neck, so that the head and neck stand out from 

 the anterior end of the genital segment at right angles to the lone- 

 axis of the latter. 



Furthermore, while Hcemobaphes carries ;l pair of soft projections 

 on the sides of the neck near the flexure, the present genus carries 

 six branched horns upon the neck, the posterior four of which are 

 hard, chitinous. and profusely mult iranmse. In Hcemobaphes the 

 genital segment has a well-defined sigmoid flexure, while here it is 

 practically straight : at least there are no trace- of a double curve. 



Hcemobaphes also has a large ami well defined abdomen, in one 

 species {ambiguus T. Scott i a-- lone- as the egg strings. Here the 

 abdomen i- so rudimentary as easily to escape notice. Finally in 

 Hcemobaphes the mouth i> ventral and there are two pair- of mouth 

 parts at some distance behind it. Here the mouth i- terminal, with 

 three pairs of knob-like mouth parts close to it. In ll<i mo bap ht s the 

 rudimentary thorax legs are biramose and without joints; here they 

 are uniramose and three-jointed. 



In view of these- essential differences the present specimens must 

 Constitute a genus by themselves. 



