EXPLANATION OF PLATE.
Fig. 1.—Camera-lucida Drawing of an adult male Physaloptera mordens.
Fig. 2.—Mouth parts of P. mordens.
Fig. 3.—Ova of P. caucasica (a) and P. mordens (b), of the same magnification.
Fig. 4.—Ventral aspect of posterior extremity of a male P. mordens, showing the arrangement of the papillæ.
Explanation of Lettering in the Figures.
c.—Cuticular ring embracing the two lips posteriorly.
c. b.—Cuticular bosses guarding the mouth laterally.
ch. i—Chyle intestine.
B.—Bursa.
ej. d.—Ejaculatory duct.
e. d.— External tooth.
i. d.—Internal tooth.
ped. p.—Pedunculated papillæ.
ses. p.—Sessile papillæ.
sm. p.—Submedian papillæ.
sp. 1.—Long spicule.
sp. 2.—Short spicule.
t. c.—Testicle coils.
ves. sem.—Vesicula seminalis.
