296 Prof. M'lntosh's ISotesfroin the 



points out tliat the mouth is not terminal, but on the inferior 

 surface of the head, behind the ventral pair of tentacles, a 

 ciliated furrow passinsi; in front of the inferior tentacles and 

 terminating superiorly in front of the dorsal tentacles. The 

 groove separating the prostoraiuni is al-o ciliated. He shows 

 tliat the antero-po.steriorly elongated eyes rest on the cephalic 

 g.inglia, which are bar-like from transverse extension. The 

 nuchal organs form two lateral ciliated processes on each 

 side between the first foot and a point opposite the eye. 

 The proboscis has a series of parallel longitudinal glands 

 with enlarged or bulbous ends posteriorly in the centre of 

 the organ, and when the latter is extruded these bnll)<)us 

 ends are distal, the tip of the organ having a smooth border. 

 ye describes and figures the pygidinm as a short cone with 

 a minute process in the centre and a circle of cilia a little in 

 front. The foot has a spine and a group of bristles, the tips 

 of the shafts being bevelled, and a serrated terminal bhule 

 articidated with it. The generative elements fill the coelom, 

 and even pass forward in to- the sides of the proboscis in ex- 

 trusion. He considers that the form belongs to the Phyllo- 

 docidse. The figures of this author are excellent, and \n 

 contrast with those of Reiljisch, who, iiowever, had only 

 preserved materials. 



In general outline Pelagobia resembles the larval stages 

 of Sp/i(S7'odonim, but differs in certain details, such as the 

 median cephalic and caudal processes and the pa{)illae on the 

 body, whilst the bristles seem to be proportionally longer. 



Reibisch (1895) gave an account of the development of 

 what he considered to be the same species (P. longicirruta) 

 as Greef's, though slight differences are apparent. He 

 figures the eggs and the young without tentacles, but wilh 

 two eyes, two feet, and two anal cirri, and various stages up 

 to the longest with twenty-four segments, and considers 

 that it approaches the young of Ettone. Its distribution is 

 almost cosmopolitan. 



Pelagobia is extensively distributed abroad, chiefly in the 

 warmer seas of both hemispheres, yet it occurs in the waters 

 of Gieenland and ranges tliiough the intermediate area to 

 the South Pacific, and appears at various seasons. 



Eulalia pusilla, ffirsted, a minute species, has probably 

 been overlooked in the collections of British observers until 

 Southern's careful investigations showed that it is not un- 

 common on the west coast of Ireland, whilst De St. Joseph 

 dredged it frequesitly at Dinard. The dorsal cirrus is elon- 

 gate-ovoid, and the two anal cirri are similar. The setigerous 

 process bears a fascicle of slightly curved, short bristles with 



