150 PERCY SLADEN TRUST EXPEDITION 



The uncinnate process is much less developed than in the Manaar specimens and the 

 avicularium is higher up inside the tubular orifice. There is only one small colony. 



Providence, 50 — 78 fath. 



72. Lepralia turrita, Smitt, Floridan Bryozoa, p. 65. 

 Amirante, 29 fath. ; Cargados, 30 fath. 



73. Lepralia poissonii, And. Hincks, Ann. Mag. Nat. Hist., ser. 5, xv, 1885, p. 256. 

 Providence, 50 — 78 fath. 



74. Lepralia cleidostoma, Smitt, Floridan Bryozoa, p. 62. 



The species in this collection has zocecia with thickly calcareous front walls glistening 

 and granular, having 2 — 3 spines on marginal cells and a sharp pointed avicularium, 

 directed upwards, on either side of the orifice. Ooecia have the same calcareous surface as 

 the zocecia and are cucullate. 



Amirante, 35 fath. 



75. Lepralia feegeensis, Busk, Keport Challenger Exp., x, pt. xxx, p. 144. 

 Cargados. A good colony growing on a Cellepora. 



76. Lepralia crassa, n. sp. (PI. 8, fig. 9). 



Zoarium loosely attached, covered by a brown epitheca. Zooecia large, flat with raised 

 margins, evenly punctured with large perforations, a raised calcareous reticulation of the 

 front wall in later stages of growth. Orifice arched above, spreading near the base with 

 a straight lower edge. Avicularia long and pointed, situated on one or both sides of the 

 orifice about half-way up and directed upwards, nearly meeting above; frequently a third 

 avicularium some way below the orifice, directed sometimes one way sometimes another, also 

 long and pointed. Ooecia large, more prominent than the zocecia and finely punctured 

 throughout, resting on a ridge-like base. Dorsal surface of zooecia smooth, elongate with 

 a small separate area at the top occupied by what is probably a perforated plate, but 

 the membranous covering is absent. On some zooecia there are clusters of radical fibres. 



Cargados, 30 fath. 



This species appears to be most nearly allied to Lepralia dorsiporosa, Busk *, but 

 the epitheca is brown, the pore is smaller and there is no perforated membrane over it, 

 also the avicularia are very difierent; ooecia were not seen on L. dorsiporosa. 



77. Lepralia marginata, n. sp. (PI. 8, fig. 10). 



Zooecia small and neat, square or elongate with a raised margin and finely punctured, 

 the surface becoming roughened with age. Orifice almost round with two spines close 

 together above on young zooecia and a tooth on either side, interiorly, more than half-way 

 down. The roundness of the orifice is disguised by an inner lining which is. arched 

 above and ends abruptly a little above the lateral teeth, leaving a hollow or sinus 



* Report Challenger Exp., x, pt. xxx, p. 143. 



