281 



T. venusta Norman. 

 Schizoporella venusia Hincks (incl. syn.), British Marine Polyzoa, pag. 27B, 



PI. XXX, figs. 6, 7. 

 Lepralia inornataGai)!) el Horn, Sniilt, Kgl, SvenskaVetensk. Akad. Handlingar, 



Bd. 11, No. 4, 1873, pag. 61, PI. XI, figs. 215— 216. 

 (PI. XIX, ligs. la-Id, PI. XXII, figs. 13a-13d). 



The zooecia are generally rounded rhoniliic, provided with numerous scallered 

 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 

 luherculated, conical, umhonate expansion (fig. 13 a). The ohlong aperture nearly on 

 Ihe 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 

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

 hounded by a somewhat prolriuling, 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 litlle inside the margin with a well-devel- 

 oped opercular arch. The numerous small dwarf zoa^cia, which are scattered 

 among the zoa-cia (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 straight or slightly concave proximal margin. The distal half of 

 eacii zofrcium has a continuous curve of 5 — 6 large pore-chambers (PI. XIX, 

 fig. 1 b) and such are also found in the dwarf zoa^cia. 



The ooeria (PI. XIX, fig. lb, PI. XXII, fig. 13a) are surrounded by dwarf 

 zod'cia, which only dilTer from those appearing among the zoo'cia by being larger 

 and of a rounded j)entagonal 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 dill'er- 

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



I.vprulia claviciilata Hincks ' must certainly also be referred to this genus, imt 

 as the offcia here seem to be enclosed by kenozooecia 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. .'.tl, 



