]42 S'iiOCEEfJlTSQH OF THE NATJOKAL MUBEUM vol. y 



lif^rn/irkH. — 'Jhfise relatively large worms are fairJy cAnxwuow i 

 (Jyyn.'fU/don 'i)arkfj(duH in (j'AvohUju h-d,y. TjBually one but mm< 

 tirrwis two Hpac'imanfi occur in a Hingle h^>«t, and in on« iuhVaucm two 

 of th'iwe and one of the huge Agarn//n/vm/i vm/m/JiffdH dcBcrilxy] below 

 were found in a single (JD'pr'ai/jdfm rjot over >i incheK in \itii]^. 

 Four fip(i<-'na<inH were found in the body cavity of one of two 

 ParalifJdli/ijH UUi/jHliffrruaH examined. Ten specimenii freshly re- 

 jrjov<id from \uUir\MA (Jyp'nnodfm were fe^i t<> ea/;h of thr<}<i donKistic 

 mallard duf^ka. When no eggs were found in the f<ic<}s by the end 

 of iltroji w<'Xiks the ducks were kilh'/i and examin^'/l, but no tra^' 

 of worms of tlje genus Ooniro/XMC-am war-; found. 



i'SJ^TK 10, FlOUBKB «, 10 



Specip; (J/i/M/n/jHU. — B<^Kly blood-red, robu>jt, tapering Jn ant^irjor 

 fourth, bluntly (ycmical at pwUirior end. I>ength 20 to 20 mnj, with 

 itmxifausn diamet<ir of 1 mm. Hea/J without diistinct lij;>K, but with 

 conspicuous poinU'/J boiiUfs^ t^>oth about .'iO//, in length. Just behind 

 hea/i cuti(;le c<f)niipicuously markti^l with anrjulations, which are very 

 ch/s<j f/^gether and end rather abruptly aff/ir about K>5/a to 150//., 

 DiameUir through pt/HUtnor part of striaWl region about i>2;V U/ 

 v50/A- J^>;ophaguii about /i,5 njm long with diameter of about 100//,, 

 follow^/1 hy apperjdix about i.J2 to 1.15 mm long. Anl/'jior diver- 

 ticulum of int/^stine 2.0 U) 2.1> mm lorjg. Anus i;>5//, U) liMjj. frojfj 

 yxjuUtrK)!- tij/, (Jaudal end of U>dy indistinctly anrjulat^^d and tei- 

 minaU'/i by derrjarcaf>e^l corjjcal loh'i. 



7'y/>^; A/>**(. — Muf/U cep/udua. 



LocoJ/'i/ya. — Kmbe/lde/1 in kidneys. 



/.or;oJity. — <'Jlalv<jsU/n Jiay, 'i"ex. 



Typ^'. H'(t<',fMii/'M. — U.tS.N.M. Jlehfj. ^>>)J. no. )/95'/'/. 



Jtmn/i/rkH. — This worm is coj/jirjon Jn /rjuih-t;-: 'JurJng the siimmer 

 months and ac/'/tunUi for the [/opular reputatiorj of mullets being 

 " w(>riny.''^ it is also fairly cominon in h'y/iui/al/m h/'.terodituh in 

 suriimer. It is a much sU>ut<'.r worrrj than (J. coUieri^ more tapering 

 anl/'jiorly, is nju';h less distinctly str-iaf/"' pos</'.r'iorly, and has a 

 diffe/'cnt f^orirjg t/>oth, a ioriger' arjd broader- coophagus, a longer 

 e«^>]/hageal apperjdix, and a differently shaped tail. 



VomU'Atu s/>ecimens freshly r'emoved fr'om inlV/ilcd mullets wen; 

 fed to <;ach of two do*rjesti(; mallard ducks. '[\iH Uu-m:-: oi th<; ducks 

 were then exanjin<'/<J f<^r ova avaiy other day for three weeks, with 

 riegative results. 'J'he ducks w<;n! then killed and examijjed. f>ut no 

 trar^e of wor'ms of the genus (Jo'fdra<uuu'/iji/m, was found. 



Tlje r'i'Jatio/j of (h<'se two sjjecies of ('(mJ/r(i/;<uuyimn. U> (.h<; adult 

 tep<iei<fH knowrj I'roj/i A Ui'/i'-an /i!-;h-ea(ing hii'ds is \\\\<-mx\m\\\ unfil 



