24 " ENKEAVOUH " SCIENTIFIC RESULTS. 



5. Hunter Group. — Similar in habit to Nos. 1 and 2, but 

 rather more Blender and with smaller hydrotheca:, which are 

 adnate for a greater part of their length and are mostly in the 

 same plane. Proximal internodes about '80, distal "34, 

 hydrotheca) "37 by '18, gonangia 1*48 by "84, with the aperture 

 '15 or '10 and the very large and high basin-shaped lip from '30 

 to '37. Annulatious about ten. 



6. Var. subdichotoma, Bale, = S. subdichotoma, K., Port 

 Jackson. — Ramification irregular, internodes very long in the 

 proximal portions, distal ones about '41. Even on the pinnae 

 many of the nodes are indistinguishable, so that an internode 

 bears several hydrotheca?. As a rule the hydrothecae are in the 

 same plane, yet on the same shoot some of the branches may 

 have them distinctly directed forward. They are adnate most of 

 their length, with the free part contracted and sub-conical. In 

 some cases the distal extremities were carried out horizontally 

 owing to successive renewals. The gonangia differ little from 

 those of the type except in the distinctive narrow aperture, 

 which measures only about '059, while the funnel-shaped lip is 

 about '10 to '15 across. They measure 1'33 to 1*48 in length, 

 with a diameter of "67, and have nine or ten annulatious. 



7. Port Phillip, 1881 (S. johnstoni, Bass Strait var., Bale). — 

 This form is of compact bushy habit, distinctly pinnate. The 

 internodes are short, about *40 on the proximal portions, and '33 

 on the distal, and even on the stem they usually bear only one 

 hydrotheca. The hydrotheca? are about '33 by '19, free for 

 nearly half their length, with the free part very slightly sub- 

 conical. They are commonly in two planes about 90° apart, 

 only hei'e and there is a branch on which their forward direction 

 is but slight. They are widely divergent laterally. The 

 gonangia are similar to those of var. subdichotoma, measuring 

 1*18 by '67, with about niue annulatious ; an aperture of '041 to 

 •059, and the lip 10 to '15. 



8. Port Phillip, 1889.— Nearly like the last. Proximal 

 internodes "59, distal '37 ; hydrotheces "38 by '21; gonangia 1'33 

 by '64, with about nine annulatious ; aperture '074 to '089, lip '13 

 to '16. 



9. Great Australian Bight, 191 1. — Internodes short, '44 to '30; 

 hydrotheca) '33 by '18; gonangia 1*26 by *81 ; aperture '044 to 

 '059, lip '089 to "15. This form is principally distinguished by 

 the gonangia, which are more top-shaped than the others, and 

 have the annulatious, which number about nine, much less 

 prominent, especially the upper ones. The narrow funnel. 



