410 



Plate XX. 



Fig. 1 a. A zooecium of Scuticella urnula (Mac Gilliv.)- 

 The fenestrse of the sternal area show a dis- 

 tinct cryptocyst. X 55. 



— 1 b. A gonozooecium from the frontal surface. 



X 17. 



— 1 c. The same gonozooecium, lateral view. X 23. 



— Id. The same gonozooecium, from the basal sur- 



face. X 23. 



— 1 e. The median chambers from the distal part 



of another gonozooecium. The downwards 

 directed point corresponds with that seen 

 in fig. 1 b. X 40. 

 -- 2 a. A bi-zooecial internode of Scuticella Wilsoni 

 (Mac Gilliv.). m: mother-zooecium, d: daugh- 

 ter-zooecium, I : the supra-scapular chamber, 

 II: the scapular chamber, III: the infra- 

 scapular chamber, IV: the pedal chamber 

 (fig. 2 b). X 40. 



— 2 b. A bi-zocecial internode of the same species, 



from the basal surface, less highly enlarged 

 (see 2 a), X 23. 



— 3 a. A bi-zooecial internode of Scuticella marga- 



ritacea (Busk). (Compare with fig. 3 b). X 55. 



— 3 b. A bi-zooecial internode of Scuticella marga- 



ritacea (Busk), var. flssurata, n. For the 

 letters and numbers see explanation to fig. 

 2 a. X 55. 



— 3 c. A gonozooecium of the same form. X 40. 



— 4 a. A zooecium of Scuticella maculata (Busk) 



(wrongly indicated on the Plate as Cat. ven- 

 tricosa). X 40. 



— 4 b. A zooecium of the same species, lateral view. 



Besides the scapular chamber the infra- 

 scapular and the pedal are also seen, (on 

 the Plate indicated as Cat. ventricosa). X 40. 



— 5 a. A zooecium of Scuticella ventricosa (Busk). 



(wrongly indicated ou the Plate). X 40. 



Fig. 5 b. A bi-zooecial internode of the same species 

 (see the explanation to fig. 2 a). X 40. 



— 5 c. (wrongly indicated as 5 a). A zooecium of 



the same species, lateral view. The scapular, 

 the infra-scapular and the pedal chambers 

 are seen. X 40. 



— 6 a. The sternal area and the aperture of Costi- 



cella cuspidata n. sp. X 75. 



— 6 b. The same species. A zooecium which term- 



inates a branch originating from a daughter- 

 zooecium. X 40. 



— 6 c. A gonozooecium of the same species. X 40. 



— 7 a. The sternal area and the aperture of Costi- 



cella solida n. sp. X 75. 



— 8 a. A zooecium of Costicella hastata (Busk), 



(from Port Phillip). X 75. 



— 8 b. A bl-zooecial internode of the same species 



(from Twofold Bay). (See the explanation 

 to fig. 2 a). The long Internal, sternal sinus 

 can be seen. X 75. 



— 9 a. A gonozooecium of Costicella benecosfata 



n. sp. X 55. 



— 1 a. A zooecium of Claviporella aurita (Busk). 



X 75. 



— 10 b. A gonozooecium of the same species. X 55. 



— 11 a. A tri-zooecial internode of Calpidium or- 



nalum Busk. X 23. 



— 1 1 b. A tri-zooecial internode of the same spe- 



cies, from the basal surface. X 23. 



— 11 c. A tri-zooecial internode of the same spe- 



cies, from the distal end. X 23. 



— lid. A tri-zooecial Internode of the same spe- 



cies, lateral view. (See the explanation to 

 fig. 2 a). X 23. 



— 11 e. A bi-zooccial internode of the same spe- 



cies, from the basal surface. X 23. 



— 11 f. A bi-zooecial internode of the same spe- 



cies, from the distal end. X 23. 



