1034 JOTTINGS FROM BIOLOGICAL LABORATORY, SYDNEY UNIVERSITY- 



I have failed to followed the history of the embryo further by 

 means of artificial cultivations, but have every reason to believe 

 that I have found a later stage in the larval development of both 

 genera in considerable numbers among the aggregations of their 

 calcareous tubes. The form is precisely similar in both cases; 

 but the larva of the Eupomatus, or what I take to be such, found 

 among the Eupomatus tubes, is very much smaller, as one would 

 be inclined a priori to expect, than that of the very much 

 larger Verinilia. There is a broad head-lobe with two pairs 

 of eyes, and, at the sides, tufts of strong cilia, which appear to be 

 the remains of the prfe-oral circlet. The body contains six 

 segments, of which the first three are large and distinct, while the 

 last three are smaller and not sharply marked off. The three 

 anterior segments each bear a pair of bundles of very long and 

 slender, slightly curved and minutely feathered provisional setse, 

 which the larva is in the habit of occasionally spreading out in 

 the form of a fan; the last segment is provided with fasciculi of 

 cilia. The buccal segment is amalgamated with the prae-oral lobe, 

 and the mouth is a large aperture on the ventral aspect of the 

 common segment thus formed. The alimentary canal is straight 

 and simple, wide in front, narrowing behind towards the anus. 



