19 
spread out to show the arrangement of tlie rays. Note the short dorsal lobe which is subdivided, 
, forming two lobes; note also the indistinct ventral lobe connecting the two lateral lobes. The 
dorsal lobe is thrown back over the body. Greatly enlarged. (After Stiles, I'JtfJb, p. 191, fig. 126.) 
[TJNCINARIA Frcelich, 1789, sensu stricto]. 
OtAtJNosis. — VncliKir'm s. 1. with iniccal lips. 
^ Type SPECIES. — Vnchiaria ndp'o^ Frcplicli. 
( 
j The New World hookworm — UNCINARIA AMERICANA'/ Stiles. 1902 — of man. 
1 (Figures 2 to 9.) 
1 , Specific Di.vtixosis. — cylindrii-al, soiiu'wluit attcniiatial aiito- 
^ riorly. Buccal capsule with ji^lorst^pair of j)roMiiuent semilunar i)lates or lips, 
I similar to V. sfenorejihalo, and a ^^itmQ pair of sli<;litly <levelopc<l lips of the same 
I nature; dorsal conital median tooth projects prominently into the huc<-al cavity, 
similar to Monodoutw^ yMale, 7 to 9 mm. Ion*;; (audal hursa with short dorso-me<liati 
lobe, which often apj>ears as if it were divided into two l(»hes, and with promin mt 
il lateral lobes united ventrally liy an indistinct vtuitral lolie; h»r rays. s(>e (i;:urfs 
7-8; comiiK)!! base of dorsal and dorso-hiti*ral rays very short; dorsal my 
divi<led to its base, its two branches heinj; prominently diver^rent ainl their tips 
bein<; bipartite; spicules lonj; and slemler. Female, 9 to 1 1 mm. lon^G vulva in 
anterior half of body, but near ecpiator. F«rj;s, ellipsoid, (>4 to 7H n lon^ by di> to 
40 broad, in some cases j)artially sef;mente<l in utero, in other i ran;) ca-'^es I'on* 
: taininjjr a fully developed embryo when oviposited. 
IIamitat. — S mall intestine of man {Homo siij>lrtis) \\\ Aim*rica ( determiiUHl to date, 
for Vir);inia, North and South Carolina, ( Jeor^ia, Flori<la, .\labama, Texa.'i, Porto 
Rico, Cuba, and Brazil). 
Type sPECi. MENS. — No. 8310, P>. A. I., V. S. Dept. A^ai<*. 
//Syxony.my with Okigix.ve Pl.u e of Pcmi.ica tio.v. 
1902: Uncinnria americaiia Stiles c^.Vm. Med., Phila., v. 3 (Pbi, May 10, pp.777-778. 
1902: Vnicinarla mnerirana (Stiles) vo.v Li.vstow* Zool. ('eiitralbl., I^-ipz., v. 9 
(24-25), 10. Dec., ]). 778. [Misprint.] 
