52 MARINE POLYZOA. 



6. CARBASEA EPISCOPALIS. PI. XLVIII. figs. 1, 2 ; & PL LV, 



fig. 3. 



Cells pyriform, cylindrical or barrel- shaped, back marked with 

 transverse rugse. Aperture circular superior. Ovicells lofty, 

 keeled. Avicularia 0. 



F. pyriformis? Lamx. Pol. Flex. 103. pi. 1. fig. 4; Blainville, 

 Man. d'Act. 451 ; Lamk. An. s. Vert. ii. 221 ; Busk, Voy. of 

 Rattlesn. i. 379. 



Hob. Bass' Strait, 45 fathoms. 



Sometimes small and parasitic, upon Sertularians and Polyzoa ; 

 sometimes independent, then of large growth, forming dichoto- 

 mously divided fronds, with strap-shaped, truncate, unequal seg- 

 ments. From its general resemblance to Lamouroux's figure, it 

 is not improbable that this may be his F. pyriformis; but as it is 

 impossible to determine this with certainty, either from his figure 

 or description, (which are equally applicable to several other spe- 

 cies,) it has been thought better to give it a new designation. 

 The one employed is suggested by the form of the ovicells, which 

 bear a close resemblance to a bishop's mitre. 



7. CARBASEA BOMBYCINA. PI. XLVIII. figs. 4, 5, 6, 7. 



Cells pyriform, cylindrical, smooth. Aperture small, circular, 

 superior; a lunate pore in the front of the cell a short distance 

 below the aperture ; one to four perforations, in a series on either 

 side of the cell, above and in front. Ovicell marked with radiating 

 lines. Avicularia 0. 



? F. bombycina, Ellis and Soland. Zooph. 14. pi. 4. fig. B ; Linn. 



Syst. Nat. ed. 13. 3828, no. 9; Bosc. Vers, 117 ; Lamx. Hist. 



Pol Flex. 103. no. 196; Exp. Meth. 3. t. 4. fig. B; Lamk. 



Ann. s. V. ii. 220. 2nd ed. ; Krauss, Z. d. Siidsee, 35. 

 Hob. Algoa Bay, Mossel Bay, South Africa. 



The figure of F. bombycina, given by Ellis and Solander, bears 

 a sufficiently near general resemblance to the species here desig- 

 nated C. bombycina, to render it probable that they may be iden- 

 tical, though this is by no means certain. Considering the locality 

 whence the present species is derived, it may not perhaps be un- 

 likely that it represents that intended by Ellis, when he says 

 (speaking of his F. bombycina, which came from the Bahama 

 Islands), " I have some elegant specimens from the East Indies 

 that approach very near to this kind." 



8. CARBASEA OVOIDEA. PL XL1X. figs. 5, 6, ? 



Cells elongated, slightly contracted below. Aperture oval, two- 



