410 



Plate XX. 



1 b. 



— 1 



— 1 



Fig 1 a. A zoccciuin of Siiilicelhi iirnuld (M;ic Gilliv.). 

 The IViK'stiii- of the sternal area show a dis- 

 liiut ervptdcvst. X ">,">. 



A gonozoceeiiini frciTii the hcmlal surl'aee. 

 X 17. 



The same Kono/ocLcium, lateral view. X 23. 

 The .same Honozixeeium, from the ha-sal sur- 

 faee. X TA. 



The median ehambers from the distal part 

 of another Koiiozoceeium. The downwards 

 direeted point eorresponds with that seen 

 in fin. 1 1). X 10. 



.A lii-zod'cial internode of Sciilicclhi Wilsoni 

 (Mae (iilliv.i. m: mother-zoteciuni. d:daugh- 

 ter-zo(i'einm, 1: the siipra-seapidar eliamber, 

 11: the seapnlar eliamber, 111: the infra- 

 scapular chamber, 1\': the pedal chamber 

 (fig. 2b\ X 40. 



A bi-zo(eeial internode of the same species, 

 from the basal surface, less highly enlarged 

 (see 2a\ X 23. 



A bi-/.o(ccial internode of Scuticella marga- 

 riiacea (Husk). (Compare with tig. 3 b\ X 55. 

 A l)i-/,o(ccial internode of Scuticella marga- 

 rilncea lUisk , var. li.ssurata, n. For the 

 letters and luiinbers see e.\i)lanation to fig. 

 2 a. X 55. 



A gonozoa-cium of the same form. X 40. 

 \ zoieciuni of Sciilicclla maciiUila (lUisk) 

 wrongly indicated on the I'late as Cnt. ven- 

 Iricosci). X 40. 



A zod-cium of the same species, lateral view. 

 Besides the scapular chamber the iufra- 

 scapular and the pedal arc also seen, (on 

 the Plate indicated as Cttl. venlricosa). X 40. 

 A zod'cium of Sciilicella iwntricosa (Busk), 

 (wrongly indicated on the Plate). X 40. 



3 a. 



3 b. 



3( 



4: 



4 b. 



Fig. 5 b 



IJa. 



lib. 



lie. 

 7 a. 



8 b. 



.\ bi-zorecial internode of the same species 

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

 (wrongly indicated as 5 a). A zotrcium of 

 the same species, lateral view. The scapular, 

 the infra-scapular and the pedal ehambers 

 are seen. X 40. 



The sternal area and the aperture of f.'os/i- 

 celhi cnspklata n. sp. X 75. 

 The same species. A zoa'cium which term- 

 inates a branch originating from a daughter- 

 zo(ecium. X 40. 



A gonozocecium of the same species. X 40. 

 The sternal ;irea and the aperture of Co.'s/l- 

 cclla solitid n. sp. X 75. 

 A zotecium of Coslicella bnxldlti (liusk\ 

 (from Port Phillip). X 75. 

 A bi-zotecial iiitci'Mode of the same species 

 (from Twofold Bay). See the explanation 

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

 can be seen. X 75. 



A gonozocecium of (losliccUa benccoslala 

 n. sp. X 55. 



A zocecium of C.kwiporelUi aiirila i Busk). 

 X 75. 



A gonozocecium of the same species. X 55. 

 A tri-zonccial internode of Cnlpidium or- 

 naliini Busk. X 23. 



A tri-zotecial inteinode of the same spe- 

 cies, from the basal surface. X 23. 

 A tri-zooecial internode of the same spe- 

 cies, from the distal end. X 23. 

 A tri-zo(ecial internode of the same spe- 

 cies, lateral view. (.See the explanation to 

 fig. 2a\ X 23. 



A l)i-zo(ecial internode of the .same spe- 

 cies, from the basal surface. X 23. 

 A bi-zooceial internode of the same spe- 

 cies, from the distal end. X 23. 



