from the Falkland Islands. 2S1 



Ocellus usually present at the b isj of every bulb, witli a 

 te.itacle or a sensory club. 



►Size: un to 25 milliin. in width and 15 niillini. in height. 



The collection contains five specimens belonging to the 

 infermediate and adult stages. 



Eucopidae. 



OfitlLlA, Peron et Lesueur (1809). 



Ohelia multicia, sp. n. 



Unibrt.'lla flat, disk-shaped. 



Stomach small, with a quadrangular base. 



Gonads globular or ellipsoid, about mi'lw.iy between the 

 stomach and margin of the umbrella. 



Tentacles about eighty to niuetv, with a heart-shaped basal 

 bulb. 



Marginal sense-orfjans small, eio-ht. 



Siz; : up to 3 millim. in diameter. 



The collection contains sixteen specimens. 



Ohelia diaphnia, L. Agassiz (1852). 



The collection contains only a single specimen. 



This species occurs on the Atlantic coast of North America. 



TiAROPSis, L. Agassiz (1859). 



EucopidjB with eight adradial marginal sense-organs (not 

 closed vesicles), each having an external oi)ening above the 

 velum. Each sense-organ has two or more otoliths and an 

 ocellus at its base. Numerous tentacles. No marginal cirri. 

 A gonad on each of the ibur radial canals. Stomach not on 

 a i)eduiicle. 



Tiarop'iis Davisii, sp. n. 



Umbrella conical, a little broader than high, with cnodc- 

 rately thick walls. 



Stomach short, cross-shaped when contracted. 



Gonads occupying nearly the whole length of the four 

 radial canals, not touching the stomach, not extending quite 

 down to the margin of the umbrella, forming a thin, narrow, 

 simple band. 



'I'entacles about eighty. 



Sense organs eight, adradial, fairly large (probably con- 

 taining several otoliths). 



Size : up to 11 millim. in width and 8 millim. in height. 



The collection contains only three specimens. 



