MAKIM: [SOPODA or \r\\ ENG1 \M\ r iv. .'!M 



ami ol' moderate si.v, not beiui; Ljreatly enlarged. The pleopods are 

 destitute of cilia in the adults. 



This famih is evidently closelv related to tin' preeedui:: :iiiil m.iv N et 

 have to be united \\ilh it. or ev on be extended so as (o include also (ho 

 ('ir<>l((iiiilir. Our represent at IN es ot' (lit 1 three families are so few dial 

 1 have had little opportunity to studv the genera. and as before slated. 

 1 have separated the ("iroltiititlir priuripallv in del i ri < ju i (> to (lu opiui)iis 

 ol' Sclii(tdt(\ Ali'tropHs KilNvanls, Si/stYiins I lanver, and .1-',ititli<>< i l>ana 



IIKIN bo mentioned as genera pointing toward ft trrtnaitioii i>ci\\tvn tln 



. / '(//(/(( and Clfinothoidat. and it is <<N idrnt that th v latter l'ainil\ is made 

 up ot' forms degraded l>.v parasitism. They h:iNe thus >\ehau: % .ed (lie 

 ainlMilaloiN leus ot' I lie ./,'</ /</<r 1'or strietl\ aiu'oral li\u's, I'or I lie uu>s( part 

 in se\eu pairs, and have lost (he natatory eilia of the pleopods. Their 

 anlennary organs are also iiiueh l\ss perl'oel than in that tainilx. All 

 these modifications are in the line of the sedentary lite ol' a parasite. 



The interesting observations of Mr..i. i<\ Uuilar \\i\\v siu>\\n that m 



eertain genera of the OymothoidCD (GynwikOQ* .V<T ><//*!, .1 nilowii) a peenli.ir 

 form ol herinapliroilit ism oeeurs, the younti' at a eerlain sta:;e ol le\el 

 opment beinu' inah's \\ith \\ell developed tesles and external organs. 

 but possessing at the saint* lime o\ aries \\ ith (he o\ id net end i lit;' blindly. 

 As development proeeeds I lie male organs !in> losl bv molting, theovi 

 duel obtains an external openin:;', t he inenbalorv |ioneh is dev>loped, 

 and the animal beeomes a female. Mr. I'.idlar's slatement.s provoked 

 considei'able diseussion, but (hey ha v e recent Iv bt>en venlie<l bv Mayor, 

 \\lni lias, however, shown that self fertili/,al ion does not oeeur. 



Three genera of CymothoidCO are repi'esenled within our limits by as 

 manv species, and a loin Ih speeies, (\iinioth<m )>rrt'ii us tutor Sa,y* (l<n,- 

 hobe) may v'l lie found, ITIU- not a rai'e parasite in the mouth ot' llu> 

 menhaden (l'>r('roorti<t nn'iili<iitru ( iill) in soul hern waters. The projcc 

 lion of I h(> front of the head over the bases of !ho anlennary orj^an , 

 and the slron:;ly hooked or ancoral le^'s nro eharaelerisl ie of I he I'amilv, 

 and lli< ^eiuM'a may DO distinguished by ineaiiH ol' the following (able : 



/ ciii:iirii, eyoi Iftrgo oonspiououii ^BgotHon t p. -i'.'n 



i ropoda< ( iyniniotrlnu.1 ; posterior (^plmcrn olongfttodi AVnu'i/i/, i>. ;t'.M 



J naked ; uodv \ 



( Miri\ niuii'l I'H'ill ; C|IIMII'| :i Nliorl, l,H'<>ii>'< 'i, p ''! 



N I-IIM 1 1. 1 I . i. li 

 n 1,1-iH'h, Dii-l. Sri. n:il., Imn. \ii, |>. Iti.l, IH|H. 



r.nd y oval ; head .small ; ev e.'; of modern to ni/,o; posterior I hoi acic 

 incuts and epimera ant;iilaled or Bpinifonn, giving ft sharply .serrated 



or dentfttod outline to the thorax; Qrst two "abdoniiiuil epimera" also 



spiniform; pleon of six distinct segments. 



Our species of \<>'<><'ii<i has the oharootors of the gonuH much i<*ss pro 



noiinccd I han < 'in.- foreign ones, as I he posterior cpimeru lire nearly 



"Jour. Ar.'iil. Nnl. Sri. I'liiln., vol, i, \>. il'.":.. I -IH. 



