233 
17, of which 3 pairs perfect. The sixth exocoel containing 5 me- 
senteries was situated on the latter side. In the undermost part 
of the column a fourth cycle is present, but I cannot decide if 
this cycle is complete, as the specimen was somewhat damaged 
in this part. 
P'igs. 34, 35. Synphellia aucklandica. Transverse sections of a clirective mesentery 
(fig. 34) and of a pennon of a non-directive (fig. 35). 
The second specimen was in the upper part provided with 27 
pairs of mesenteries. Between the two pairs of directives there 
were on one side 1 1 pairs, of which 2 pairs and a single mesent¬ 
ery of the second order perfect, on the other side 14 pairs, of 
which 3 pairs perfect. In the exocoels between these perfect pairs 
normally 3 pairs were developed, only in a single exocoel one pair 
of the third order was missing. 
The perfect mesenteries were furnished with strong, high, dif¬ 
fuse to almost circumscript pennons (the latter in the directives). 
In the textfig. 34 I have reproduced a section of the pennon of a 
directive mesentery, in the textfig. 35 a pennon of a non-directive. 
