ON RECENT POLYZOA. 579 
sent, immersed, and usually placed near the orifice, either above, below, 
pr on one or both sides. Orifice notched or sinuate, or caniculate 
below.’ —Chal. Rep. p. 168. 
§ 1. Myriozoa typica. 
1. Myrizoum truncatum, Donati. 
As subgracile, D’ Orbigny. 
3 a) coarctatum, Sars. 
Referred to and placed as above in the ‘ Challenger Report’ (p. 169), 
but not otherwise described. 
§ 2. Myriozoa dubia. 
1. Myriozoum honolulense, Busk, ‘Chal. Rep.’ pl. xxv. fig. 2 
=. 2. e immersum, Busk, ‘Chal. Rep.’ pl. xxv fio. 4. 
a 3. es simplex, Busk, ‘Chal. Rep.’ pl. xxv. fig. 1. 
A, is Marionense, Busk, ‘ Chal. Rep.’ pl. xxiii. fig. 6. 
Genus 75. Haswellia, Busk 
= Myriozoum (sp.), Haswell. 
_ Zoarium composed of short cylindrical branches, spreading in all 
rections dichotomously at very openangles. Zocecia disposed verticel- 
y, and more or less irregularly quincuncial, with a produced tubular 
ub-tubular and bifid, or simply thickened peristome, supporting on 
side a small avicularium with a pointed subtriangular mandible. 
nary mouth clithridiate, with an operculum of corresponding form. 
. Haswellia australiensis, Haswell, ‘Chal. Rep.’ pl. xxiv. fig. 9 
= Myriozoum australiense, ‘ Proc. Lin. Soc. N. 8. Wales,” 
1880. 
im auriculata, Busk, ‘Chal. Rep.’ pl xxiv. fig. 10. 
Genus 76. Tessarodoma, Norman 
= Pastulopora (pars), Sars; Quadricellaria, Sars ; Alder 
+ =Anarthropora, Smitt; Tessarodoma, Norman. 
c Porina (part), Hincks. 
Tessaradoma boreale, Busk, ‘Chal. Rep.’ p. xxiv. fig. 8 
v = Pastulopora gracilis, Sars 
= Quadricellaria gracilis, Sars 
= Onchopora borealis, Busk 
= Anarthropora borealis, Smitt 
= Tessarodoma gracile, Norman 
= Tessarodoma boreale, Smitt 
= Porina borealis, Hincks. 
Genus 77. Gemellipora, Smite. 
Gemellipora (pars), Smitt, ‘ Florid. Bryozoa.’ 
*Zoarium erect and ramose, or crustaceous and adnate. Mouth 
ate, pyriform, with an articular notch on either side below. Oper- 
‘um of corresponding pyriform shape. A median immersed avicu- 
m, either above or below the mouth.’—Chal. Rep. p. 176. 
PP? 
