REPORT ON THE ENTOZOA. 
9 
The tail end is rounded off and exhibits a broad bursa. On the ventral surface on each 
side there are 4 pre- and 5 post-anal, long-stalked papillae, and between the third and 
fourth post-anals there is a large interspace. The cirri are very unequal ; the smaller 
and thicker is 0'14 mm. in length ; the larger and narrower measures 0'6 mm., and 
bears a terminal process projecting at right angles. 
The female measures 972 mm. in length, and 0'35 mm. in breadth ; the oesophagus 
occupies of the total length ; the conical-pointed tail ^ l T . The vulva lies far forward 
just in front of the passage of the oesophagus into the intestine. The very thick-shelled 
ova are 0’039 mm. in leugth, and 0‘019 mm. in breadth. Similarly three-pointed 
nuchal papillae are exhibited by the following forms : — Filaria squamata, von Linstow, 1 
from the intestines of Phalacrocorax carbo (with conspicuous neck fringes, and very 
short (-jj-g-g-) tail, Filaria involuta, von Linstow, 2 from the skin of the stomach of Strix 
Jiammea, also with marked neck fringes, Filaria ( Dispharagus ) laticeps, Rud., 3 from 
Falco, Strix, AEgolius (also with neck fringes), Filaria tridentata, von Linstow, 4 from 
Coly mbits arcticus (with nuchal papillae of a different form, and with the oesophagus 
occupying only \ of the total length), Filaria trisenucha, Wright, 5 from Ardea minor 
(only known as a female with ova, 0'027 mm. in length, and 0'018 mm. in breadth). In 
these five species the fish-hook like process of the longer cirrus is absent. 
The latter is exhibited by Filaria hamata, von Linstow, 6 from Astur nisus, a species 
with strongly developed neck fringes, and by Filaria penihamata, Molin,' from Strix 
albomarginata, Strix atricapilla, Strix jiammea , and Strix griseata, which has only two 
post-anal papillae on either side. 
8. Filaria Jlabellata, n. sp. (PI. II. figs. 1-5). 
Specimen labelled : “ Fdaria sub cute et in cav. abdom. of Paradisea apoda, from 
Axu Islands.” 
The specimens were all burst, and in part torn. The body is short and compressed ; 
the two ends of the body are rounded off, and not narrowed. The breadth averages 
1-08 mm., and bears a ratio of 1 : 14-15 to the length. The mouth cavity is supported 
on each side by tripartite, fern-shaped, chitinous plates, measuring 0'21 mm., and 
rounded off at the corners. The oesophagus measures of the total length. 
1 Archiv f. Naturgesch., Jahrg. xlix. Bd. i., 1883, pp. 287, 288, pi. vii. figs. 18, 19. 
2 JViirtlemb. naturw. Jahresli., xxxv., 1879, pp. 323, 324, pi. ii. fig. 7. 
3 Schneider, Monographie der Nematoden, pp. 93, 94, pi. vi. fig. 3 ; von Drasche, V erhandl. d. k. k. zool.-bot. Gesellsch. 
Wien, 1883, p. 209, pi. xiv. fig. 2. 
4 Archiv f. Naturgesch., Jahrg. xliii. Bd. i., 1877, pp. 10, 11, pi. i. fig- 17. 
6 Contributions to American Helminthology, Toronto, 1879, pp. 21, 22, pi. i. fig. 16. 
6 Archiv f. A aturgesch., Jahrg. xliii. Bd. i., 1877, pp. 11, 12, pi. i. fig. 19; Jahrg. xlv. Bd. i., 1879, p. 172, pi. xi. fig. 1 /. 
7 Von Drasche, Verliandl. d. k. k. zool.-bot. Gesellsch. Wien, 1883, Bd. xxxiii. pp. 198, 199, pi. xiii. fig. 6. 
(zool. CHALL. EXP. PART LXXI. — 1888.) Bbbb 2 
