1915.] I. SOUTHWELL: Parasites from Fish and Aquatic Birds. 333 
Body articulate, taeniaeform. Head separated from the body 
by a neck. Bothria 4, opposite, pedicelled, broken up into lacinio- 
cristate folds which are transversely costate. Unarmed. Auxiliary 
acetabulum none, terminal papillanone. Genital apertures marginal. 
The genus Phyllobothrium would thus also appear to be closely 
related to the genus Spongiobothrium, from which it differs only 
in the absence of the cristate folds on the rostellum. It will be 
observed that the characters of the genera Cvossobothrium and 
Spongiobothrium relate almost entirely to external features, and 
the anatomical details are few and unsatisfactory. It is highly desir- 
able that such details should be worked out so that the true rela- 
tionships of the genera could be determined. It is not impossible 
that subsequent research may suggest the desirability of regarding 
_ external features such as the presence or absence of a neck, or sup- 
plementary suckers, or of a myzorhynchus, as specific, rather than 
generic, characters. 
LITERATURE. 
Shipley and Hornell, Ceylon Pearl Oyster Reports, Part V, 
London, 1906. 
Genus II, Parataenia, Linton, 1889. 
Parataenia medusia, J,inton, 1889. 
Z.E.V 887+ Intestine of Main area, T. Southwell. 
fly polophus Chilka Lake, 
sephen. Nov. 29, 1914. 
Only two species of Parataenia are known, viz. P. medusia, 
Linton, and P. elongatus, Southwell. The latter differs from the 
former in being ten times longer, in possessing a neck, and in the 
ripe segments being broader than long. 
Linton’s specimens of P. medusia measured 6 mm. long, but he 
observed that ‘‘ they must grow somewhat longer than this.” Our 
specimen (we obtained only one) measured 15 mm. In other res- 
pects it agreed with Linton’s description. 
LITERATURE. 
Linton, Notes on Entozoa of Marine Fishes. U.S. Fish 
Comm. Report for 1887, pp. 862-866, plate xv, figs. 5-9 
(Washington, 1891). 
Southwell, Ceylon Marine Biological Reports, Part VI, p. 273, 
pl. ili, fig. 40 (Colombo, 1912). 2 
Tribe CALLIOBOTHRIINAE, Perrier, 1897. 
Genus Calliobothrium, Van Beneden, 1850. 
Calliobothrium eschrichtii, Van Ben. 
Z.E.V. $822 Spiral valve of Main area, T. Southwell. 
Hypolophus Chilka Lake, 
sephen. Dec. 1914. 
