2 
CRISIIDJE. 
Diagnosis. 
Crisiidae with the zooecia uniserial or biserial. . 
Type Species. 
Crisia ehurnea (L.). Recent: European seas. 
This genus is well known among recent marine Bryozoa, and is 
represented in the existing British fauna, according to Dr. Harmer’s 
monograph/ by six species. It has been recorded fossil from 
various Cainozoic horizons, as by Busk^ doubtfully from the 
Pliocene, and by von Reuss® from the Oligocene and Miocene of 
Austria. Its range has been extended to the Cretaceous by 
d’Orbigny and Pergens. Pergens has referred a series of small 
isolated cyclostomatous tubes from the Belgian Cretaceous to this 
genus. Judging from his figures the correctness of his identi- 
fication appears to be probable. Owing to the articulate structure 
of the zoarium, Crisice are not likely to be well preserved as 
fossils, for the zooecia will naturally fall apart by the decay 
of the chitinous joints. The British Museum collection includes 
no Cretaceous representatives of the genus. 
The Unicrisia of d’Orbigny,^ founded on a French Senonian 
species, is a doubtful member of the Crisiidae ; the fragment 
figured by d’Orbigny {op. cit. pi. 734, figs. 13, 14) does not 
show that the zoarium was articulated. 
Mr. "Waters has identified® the Crisina unipora of d’Orbigny as 
a Crisia. He has figured at the same time a Bryozoan from 
Curdies Creek in South-Eastern Australia, which is probably of 
Miocene age, as a representative of the French Cretaceous species. 
His figure shows a Bryozoan with thick, irregular, .sinuous branches, 
^ S. F. Harmer. “ On the British Species of Crisia ” : Quart. Journ. Micro. 
Sci. vol. xxxii. (1891), pp. 127-81, pi. xii. 
2 G. Busk. Crag Polyz. p. 93. 
3 Crisia edwardsi, C. hoernesi, and C. haueri, A. E. von Beuss. Foss. Polyp. 
Wien. Tertiarh. : Naturw. Ahh. vol. ii. pp. 53, 54, pi. vii, figs. 20-1. Also in 
Fauna dent. Oheroligoc. ii. : Sitz. k. Akad. Wiss. Wien, vol. 1. Aht. i. (1865), 
p. 667, pi. XV. figs. 6-8. The last species was suggested hy Manzoni, Bry. mioc. 
Austr. Ungh. iii. (Denk. Akad. Wiss. Wien, vol. xxxviii. pt. ii. (1878), p7 3), to 
be a synonym of C. ehurnea (L.). 
^ D’Orbigny. Bry. Cret. p. 600. 
5 A. W. Waters. Foss. Cycl. Austral. : Quart. Journ. Geol. Soc. vol. xl. 
(1884), p. 683. 
