1897 - 98 .] Prof. D’Arcy W. Thompson on Marine Faunas. 321 
Opliiacantlia rosea , Lym. — Described from 
Off Marion I., lat. 46° 40' S., long. 37° 50' E., 310 fms. 
Magellan Sts., „ 50° 10' S., ,, 74° 42' W., 175 ,, 
Near Yokohama, lat. 34° 58' N., long. 139° 30' E., 420-775 fms. 
The genus is one of very numerous (about 40) species, and is 
very widely distributed. 
Ophioden hastatum , Lym. — 
Station 78, lat. 37° 24' N., long. 25° 13' W., 1000 fms. 
„ 146, „ 46° 46' S., „ 45° 31' E., 1375 „ 
„ 168, „ 40° 28' S., „ 177° 43' E., 1100 „ 
OpTdoglypha bullata, Wyv. Thoms.— 
Lat. 38° 34' K, long. 72° 10' W., 1240 fms. 
„ 34° 51' N., „ 63° 59' W., 2650 „ 
„ 34°54'N., „ 56° 38' W., 2850^ „ 
„ 35° 41' S., „ 20° 55' W., 1900 „ 
On p. 44 of Mr Lyman’s Report, O. bullata is referred to as 
“ the extreme ” of the deep-sea species of the genus. The genus 
includes 57 species. 
Ophiernus vallincola , Lym. — The only species of the genus. 
Erom lat. 37° 24' K, long. 25° 13' W., 1000 fms. 
„ 46° 46' S., „ 45° 31' E., 1375 „ 
„ 62° 26' S., „ 95° 44' E., 1975 „ 
Antedon abyssicola , P. H. Carpenter. — This little crinoid is 
reported from 2600 fathoms, lat. 42° 42' S., long. 134° 10' E., off 
Melbourne, and from 2900 fathoms, lat. 35° 22' N., long. 169° 53' 
E., between Japan and the Sandwich Islands. It is a very tiny 
species, with a disc about 3 mm. across, and a spread of about 
5 cm. It is the only Comatula described in the Challenger Reports 
from a depth greater than 2000 fathoms. One specimen was 
obtained from the northern, and two from the southern locality. 
An inspection of the figures (pi. xxxiii. figs. 1 and 2) suggests a 
grave doubt as to the precise identity of the two species ; the basal 
plates, in particular, are shown to be much broader in shape in the 
northern example. But if the two be accepted as identical, I see 
nothing very remarkable in the presence of the same abyssal form 
at two stations in the region of the Western Pacific, off the 
Japanese and the Australian coasts. 
Professor Jeffrey Bell tells me that the three specimens of A. 
