REPORT ON THE POLYZOA. 
137 
circular, with a straight entire lower border, with or without oral spines. An avicu- 
lario-vibracular organ on one side of the front with the mandible forked at the base ; 
or unarmed. 
(1) Microporella per sonata, Busk, sp. 
Lepralia personata, Bk., Brit. Mus. Cat., p. 74, pi. xc. figs. 2, 3, 4. 
Microporella ciliata, var., Hincks, Brit. Mar. Polyz., vol. i. p. 209. 
Character. — Zocecia immersed, oblong, surface punctured. Mouth semicircular, lower 
lip straight, prominent, entire ; five to seven oral spines 
above ; a long avicularian vibraculum on one or both sides 
of the front. Ooecium smooth, cucullate ; in the fertile 
cells the iower lip is much produced in front. 
Habitat. — Station 208, lat. 11° 37' N., long. 123° 31' 
E., 18 fathoms, blue mud (on a dead shell). 
[Falkland Islands, 4 to 10 fathoms, on stones and Fuci, 
Darwin.] 
Though perhaps closely related to Microporella ciliata, 
I think the great and constant difference in the fertile cells 
sufficient as a specific distinction. 
Fig. 41 . — Microporella personata. 
a, Operculum ; b, mandible. 
(2) Microporella malusii, Audouin (sp.). 
Cellepora malusii, Audouin. 
Lepralia biforis, J ohnst. 
Herentia biforis, Gray. 
Escharina cornuta, d’Orb. 
Reptoporina malusii, d’Orb. 
Lepralia malusii, Busk, Heller, Manzoni, &c. 
Porina malusii, Smitfc. 
Microporella malusii, Hincks. 
Character. — Cells ovate, truncate at each end ; front, especially round the margin, 
punctured with numerous stelliform pores ; a large central lunate pore ; mouth semi- 
circular, straight below, sometimes armed with three or four oral spines, which are 
occasionally forked. Ooecium smooth, sometimes porcellanous, grooved or areolated round 
the upper border, adnate to the front of the cell above. 
Habitat. — Station 315, lat. 51° 40' S., long. 57° 50' W., 5 to 12 fathoms, sand and 
gravel. Station 135c, off Nightingale Island, Tristan da Cunha, 110 to 150 fathoms. 
[Cosmopolitan.] 
(ZOOL. CHALL. EXP. — PART XXX. — 1884.) Gg 18 
