On the Aiisiralian Specks of Ainatliia. 135 



South Australia. 



I have only a small specimen of this species. It is readily 

 distinguished by the long, very slender, filamentous stems and the 

 spiral cluster of zocecia occupying the upper half of each internode, 

 the lower part being bare. The zooecia ai-e rather short, and not 

 very closely united. 



** Zooecia in straight or oblique clusters. 

 t No appendages. 



6. A. LENDIGERA, Linnteus sp. 

 (Plate B., Fig. 1.) 



Amathia leiidigera, Lamouroux, Pol. Corall. Flex., p. l.")9 ; Id. 

 Expos. Method, p. 10 ; Hincks, Brit. Mar. Pol., p. 516, pi. Ixxiv., 

 figs. 7-10 ; Busk, Challenger Pol, pt., ii., p. 33. 



Serialaria letidigera, Lamarck, An. 8ans Vertebres, ed. 1, ii., 

 130; ed. 2, ii., 169 ; ed. 3, L, 211 ; De Blainville, Man. d'Actin- 

 ologie, p. 476 ; Johnston, Brit. Zoophytes, ed. 2, p. 368. 



Zoarium consisting of dichotomously divided, slender, intricately 

 interwoven branches. Zonecia in straight, biserial clusters of 4-8 

 pairs, diminishing in height from the proximal to the distal, and 

 occupying the upper third or half of an internode. 



Western Port, Rev. Mr. Porter. 



Of this the only Australian specimen I have agrees precisely 

 with the well known European form. It is closely allied to the 

 succeeding, under which the distinguishing characters are pointed 

 out. 



7. A. OBLiQUA, new species. 

 (Plate B, Fig. 2.) 



Zoarium consisting of slender, dichotomously divided branches, 

 not interwoven. Zocecia in oblique, biserial clusters of 6-9 in 

 each row, occupying almost the whole length of the straight 

 internodes. 



Port Philip Heads. 



This is closely allied to A. kndigera with which it seems to 

 have been considered identical by Mr. Kirkpatrick. The habit of 

 growth, however, is quite different. It forms tufts of considerable 



