ORDER P@CILOPODA — PANDARUS. 59 
(EXTRA-LIMITAL.) 
Genus Panparus, Leach. Body ovate, occasionally elongate, ending in two long filaments. Shield 
rounded in front, truncate behind. Antenne two. Feet fourteen; the six anterior unguiculated, 
the others bifid. Body covered with transverse scales, dentate on their posterior edges. Para- 
sitic. 
P. sinuatus. (Say, 1. c.p. 436.) Body oblong, quadrate, dilated. Scalessix: four subequal, in a trans- 
verse line at the base of the abdomen, rounded at tip; two larger, arising beneath the preceding, 
slightly dentate at the tip, and not concealing half the abdomen, which is sinuate behind. Length, 
0-2. Hab. body of Mustelus canis, or American Hound-fish. 
Genus Crcrops, Leach. Body oval, obtuse at the extremities, covered with four unequal scales which 
are emarginate. No posterior filament. Feet fourteen: the six anterior unguiculate ; fourth 
or fifth bifid; sixth and seventh with dilated cox; the others membranous, dilated, natatory. 
Antenne two, very small. Parasitic. 
C. latreilli, Leacu. (Desm. pl. 50, fig.2. Srorrr, Rep. Fishes, p. 172. Pu. 10, fig. 44 of this work.) 
Shield coriaceous, bipartite: the anterior portion obcordate, deeply emarginate behind ; the poste- 
rior consists of three, overlapping each other, and becoming gradually larger from before. An- 
tenne of two joints, terminated by a single hair. Hab. Orthagoriscus mola. Northern Coast, 
GENUS LERNEA. Cuwvrer. 
Body long, cylindrical, more or less filiform ; enveloping membrane sub-coriaceous. Head 
enlarged, with processes varying in number and size. Caudal extremities variously ter- 
minated. Parasitic. 
Oxzs. The animals of this and the following genus were originally arranged under the Intes- 
tinal worms. 'They have, however, notwithstanding their anomalous vermiform appearance, 
too many characters in common with the crustaceans, to leave them where they were originally 
placed. Some late writers have proposed to erect them into a distinct class between Insects 
and Worms. 
LERNEA CRUCIATA. 
Lerneocera cruciata. Lesurur, Ac. Nat. Sciences, Vol. 3, p. 286, pl. 11, fig. 4. 
Description. Body slender before, dilated behind, transparent ; mouth central, surrounded by 
five robust processes. On the caudal extremity are five rounded tubercular processes. 
Found attached to the Cichla @nea, or Rock Bass of Lake Erie. 
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