BY R. VON LENDENFELD, PH.D. 931 



The gastro-vascular system of our larva resembles one stage of 

 Eucharis very closely. (Chun I.e., Tafel. IX., fig. 7.) The two 

 tentacles are very long. (Fig. 3), extended up to ten times the 

 length of the body. 



A later stage, measuring 8 mm. in dianietei*, is represented in 

 figures 4 and 5. 



The difference between it and Eucharis larvae of a similar size 

 mainly consists in the greater width of the canals in the former, 

 and in the peculiarity that the tentacles arise very much further 

 from the point where the main channel branches, so that a 

 continuation of the perradial canal stem is formed which extends 

 as far beyond the branches as these are distant from the centre 

 (Fig. 5.) 



The paddle-lines are long, and lines can already be traced con- 

 necting them with the aboi-al pole. (Fig. 4.) 



The lobes are very small, about the same size as in a 6 mm. 

 larva of Eucharis. When the animal attains a length of about 

 3 Cm., all its parts are developed and it presents the same 

 appearance as the largest. 



The lobes of the smaller species are carried much further apart, 

 more horizontally than in the larger individuals. 



EXPLANATION OF PLATES XLIv". and XLV. 



BOLINA ChUNI. 



Fig. 1. — Large specimen in natural size, painted from life. Seen from the 



funnel-plane. 

 Fig. 2. — The same from the Gastral-plane. 



Fig. 3. — Youngest larva, magnified four diameters, painted from life. 

 Fig. 4. — Older larva, magnified about four diameters from the Gastral-plane, 



painted from Jiie. 

 Fig. 5. — The same from ahove. 



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