COASTS VISITED BY THE ARCTIC EXPEDITION. 611 



irregulare ; no transverse or connecting tubes, as in Syringopora, 

 can be made out : this and traces of the columella, two essential 

 characters, remove it from Syringopora. The diameter of the coral- 

 lites diners, as in the British species. M'Coy's genus Siphonodendron 

 is clearly a modification of Fleming's older genus Lithostrotion, 

 although M'Coy dwells upon the mode of development or increase 

 by lateral budding in Siphonodendron, as distinguished from lateral 

 division of the old calice and dichotomous fissure of the stem, also 

 on the simple axis and conoidal transverse diaphragm in Siphono- 

 dendron, the axis in Lithostrotion being large and cellular and there 

 being no diaphragm. 



Captain Feilden collected this one specimen at Feilden Isthmus, 

 lat. 82° 43', in a grey limestone. 



Class ANNELIDA. 

 Genus Serpulites, MacLeay, 1839. 



Serpttlites carbofarius, M'Coy, Carb. Foss. Ireland, p. 170, t. 23. 

 f. 32 (or allied to this species). 



The order Tubicola is represented in the collection only by this 

 one species ; it is badly preserved, but there is enough to show that 

 it may be the Serpulites carhonarius of M'Coy, loc. cit. It was 

 collected at Rawling Bay. 



Subkingdom MOLLUSCOIDA. 



Class POLYZOA (BBYOZOA). 



The Polyzoa collected by Captain Feilden are both numerous and 

 important and demand careful notice, especially as they are from 

 rocks of the highest latitude in which fossils have yet been obtained, 

 viz. Feilden Peninsula, between lat. 82° 43' and 82° 50' N. The 

 specimens, too, are finely preserved, and capable of comparison with 

 known Carboniferous-limestone species from America, Spitzbergen, 

 and Europe. 



. I append, through the aid of Mr. R. Etheridge, Jun., a valuable 

 bibliography and description of the species collected, so far as their 

 preservation will allow. All the specimens are Carboniferous, and 

 therefore the group needs no reference under the Silurian portion of 

 this paper. It is singular that we have no Silurian forms of Polyzoa 

 in the collection, considering that, bathymetrically, we should expect 

 to find them associated with the numerous corals and Brachiopoda. 



The bibliography and descriptions will greatly aid in the study of ' 

 the characters of the Carboniferous Polyzoa of the northern hemi- 



