281 



T. venusta Norman. 



Schizoporella venusta Hincks (incl. syn.), British Marine Polyzoa, pag. 276, 



PI. XXX, figs. 6, 7. 



Lepralia inornataGabb etHorn, Smitt, Kgl, SvenskaVetensk. Akad. Handlingar, 



Bd.ll, No. 4, 1873,pag.61,Pl.XI, figs. 215— 216. 

 (PI. XIX, figs. 1 a-1 d, PI. XXII, figs. 13 a-13 d). 



The zooecia are generally rounded rhombic, provided with numerous scattered 

 pores, strongly arched and ascending towards the portion immediately on the proxi- 

 mal side of the aperture, which terminates in a strong, hollow, often irregularly 

 tuberculated, conical, umbonate expansion (fig. 13 a). The oblong aperture nearly on 

 the boundary of the proximal third has a pair of strong hinge-teeth, each of which 

 is situated within a triangular, inwards projecting part of the lateral margin. Its 

 anter has two proximally converging, lateral margins, and its triangular poster is 

 bounded by a somewhat protruding, almost rectangularly curved margin. The 

 well-chitinized operculum (PI. XXII, fig. 13 e) is in its principal part provided 

 with small, scattered tubercles and a little inside the margin with a well-devel- 

 oped opercular arch. The numerous small dwarf zooecia, which are scattered 

 among the zocecia (PI. XIX, fig. 1 a, PI. XXII, fig. 13 d) are on the examined 

 colony of a rounded quadrangular form. The very small, quadrangularly oval 

 aperture is bounded proximally by a somewhat protruding margin and not wholly 

 covered by the well-chitinized, finely dotted operculum (PI. XXII, fig. 13 d), which 

 has an almost sti-aight or slightly concave proximal margin. The distal half of 

 each zocecium has a continuous curve of 5 — 6 large pore-chambers (PL XIX, 

 fig. 1 b) and such are also found in the dwarf zocecia. 



The oceria (PI. XIX, fig. 1 b, PI. XXII, fig. 13 a) are surrounded by dwarf 

 zooecia, which only differ from those appearing among the zooecia by being larger 

 and of a rounded pentagonal form. 



Of this species I have been able to examine a small colony from Guernsey, 

 which was sent me by the Rev. Norman, and another colony from Port Phillip 

 (Miss Jelly), which in all essentials agrees with the British form, the only differ- 

 ence being its want of an expansion proximally to the aperture. 



Lepralia claviculata Hincks ^ must certainly also be referred to this genus, but 

 as the ooecia here seem to be enclosed by kenozocecia without aperture, the dia- 

 gnosis of the genus would have to undergo a small alteration to be made appli- 

 cable also to this form. 



' 34, p. 50, 



