24 W. A. 111:RI)MAX. 



17. "24. vi. 04; Lat. 58' 4'J' 45" S. ; Long. 124'' 48' AV., 5 fin.s." (Twenty- 



three .specimens.) 



18. " 25. vi. 04 ; Lat. 5'.)'' 19' S. ; Long. 120^- 24' :!0" W.. .'. fnis." (Tliirty-cight 



.specimens.) 

 I'J. -28. vi. 04 ; Lat. SI)"- :}4' :i0" S. ; Lung. lOG" 28' 15" \V.. 5 liiis." (Forty 

 .specimens.) 



DESfniPTION OF TIIK PLATES. 

 I'l.ATi-: I. 



Fio. 1. — Stjjela spertnbilis, from the left side ; natural size. 



Fifi. 2. — Branchial aperture, from ventral surface ; Rlighlly enlarged. 



Fio. 3. — Atrial aperture, from dorsal surface ; slightly enlar<i;c(l. 



Fio. 4.— Musculature of the mantle ; natural size. 



Fio. 5.— Part of the branchial sac, showing two folds {l>r.f.) and the iulervenin;.,' urea ; natural size. 



Fin. C. — Small part of the branchial sac, between two of the internal longitudinal bars {i.lh.) ; x &0. 



Fio. 7. — Tentacles, dorsal tubercle and dorsal lamina ; slightly enlargetl. 



Fj(1. 8.— Tile alimentary canal and the gonads of the riglit side ; natural size. 



Fio. t).- Some of the larger endocari)s ; natural size. 



I'l.ATH II. 



I'lii. \.—Hnlunjiitliia selosa, Sluiicr : natural size. 



Fill. 2.— Sectiun tlirough tlie test and it-« dense covering of long spines ; natural size. 

 Fio.s. 2a, 2b and 2r. — Terminal jiarts of three test sjiines of rather dilTereut tyjK-s ; X .'■>i>. 

 Fni. :!.— Tlic body after removal of the test, to show the powerful nmscuiature ; natural size. 

 Fio. 4. — Tentacles, dorsid tubercle, doi-sal languets, braiuhial folds, etc. ; natural size. 

 Fio. Ti.— Part of the bmnchial sjic, showing three folds ; natural size. 



Fiii. C— Small part of tlie iiranchial sac between two b.ir.4, showing the transverse vessels and tin 

 stigmata ; X .^o. 



