ENTOZOA, 189 
only to some species from Mammalia, which have a flat tongue-like form, 
and especially to that found in the lungs of the hare by Franicu, and not 
since re-discovered, Linguatula serrata. See J. A. Fra@vicy, Beschreibung 
einiger neuer Hingeweidewiirmer, Naturforscher xxiv. 1789. s. 148—r1 50. 
Tab. Iv. f. 14, 15. 
[T. D. Scuusert (Letter to V. SreBoLp Zeitschr. f. wissenschaftl. zool. rv. 
1852. s. 117, 118) concludes from his observations on the development of 
Pentastoma in the egg that it ought to be placed amongst the Acarina or 
Lernceacea. The embryo has two hooklets at the anterior part, or head, 
two pairs of lateral appendages or feet, each foot furnished with two claws, 
and a tail as long as the rest of the body, into which the intestinal canal 
is continued. ] 
Phalanx II. Strongyloidea nob. Mouth terminal, or sub-ter- 
minal anterior, not surrounded with retractile hooks. Body round, 
elongate, elastic. 
a) Mouth anterior, not terminal. 
Rictularia Fraevicu, Dusarp. 
Comp. Fraxzicu Naturforscher xxix. 1802. s. 9. Tab: rf. 1-=3; Du- 
JARDIN Helminth. p. 280. 
Ophiostoma Rup. 
Genera Dochmius, Dacnites Dus. 
b) Mouth anterior, terminal. 
Cucullanus Murti. Body elongate, posteriorly attenuated. 
Head broad, with bivalve apparatus for manducation. Mouth a 
longitudinal, vertical fissure. 
Sp. Cucullanus elegans Zupmr, Rup., Entoz. Hist. nat. Tab. rt. figs. I—3, 
BreEmseER Icon. Helm. Tab. 11. figs. 10—14; in the intestinal canal, the 
stomach and the pyloric appendages of the perch and other fresh-water 
fishes ; almost all the other species of this genus live likewise in the intes- 
tinal canal of fishes. 
Fleterocheilus Dtesinq. 
Strongylus Muni. Body round, sometimes filiform, very long, 
acuminated anteriorly. Mouth orbicular or triangular. Apex of 
the tail terminated in the male by a bursa emitting a double or 
single penis. 
Sp. Strongylus gigas Rup. Entozoor. Hist. nat. Tab. 1. figs. 1—4; BREMSER 
Ueb. leb. Witrm. Tab. 3—5, in the kidneys of man and of different mam- 
malia ; this worm can attain the length of more than a foot, the female of 
three feet. The colour is red, as in many other species of this genus. 
