ANCESTRULAE OF CAMPTOPLITES 



3. Spines absent 

 Spines present 



4. Ancestrula has a single series of distal spines and usually one proximal spine 

 Ancestrula has distal spines in two groups and no proximal spine ... 



5. Separation of distal spines into two groups appears at first zooecium 



The first-formed zooecia have a single series of distal spines, separation into two 

 appears later ... 



6. Opesia short, ancestrula with three to five spines at each corner 

 Opesia long, ancestrula with one or two spines at each corner 



439 



Species 2 

 ... 4 



••• 5 

 ... 6 



Species 4 

 groups 

 Species 3 



Species 5 

 Species 6 



ru 



c o 



&^ 



1 . 1 . 1 ■ 1 ■ 1 ■ 1 

 Q -5mm 



Fig. 41. A. Camptoplites. Ancestrula, species 4. St. 181, Palmer Archipelago. The stalk of one of the 

 avicularia is indistinguishable. B. Camptoplites. Ancestrula, species 3. St. WS 42, South Georgia. 

 The appearance of a ninth distal spine to the right of the ancestrula is erroneous. C. Camptoplites. 

 Ancestrula, species 3. St. 1652, Ross Sea. Avicularium. 



a. ancestrula, ax.r. axillary rootlet, b.bd. basal band, ru. runner, i-6, zooecia. 



Relationship of ancestrulae to adult forms 

 Species 1 (Fig. 39 B). The general character of these four young colonies suggests the 

 C. bicornis group, and the avicularia, which may be present on the first zooecium, 



