102 Canon A. M. Normau — Notes on the 



pi. xxvi. fig. 1)^ and frequently carrying an avicularium at 

 its summit. 



Specimens of C. punctata as here restricted are in my 

 collection from Naples ; Salcombe, Devon ; Birturbuy Bay, 

 Ireland ; Wick, 40 fathoms ; Shetland, including the largest 

 zocecia I have seen of the species, from 120 fathoms ; and 

 Nantucket, N.E. America. 



40. Ci'ibrilina cryptooec'mm^ sp. n. (PI. IX. figs. 1, 2.) 



1867. Escharipora jmnctata, Smitt, " Kritisk Forteckning, &c." p. 4, 



pi. xxiv. ficfs. 4-7. 

 1880. Cribrilina punctata, Ilincks, Hist. Brit. Marine Polyzoa, p. 190 



( partijii), ])1. xxiv. fi^. 3, and pi. xxvi. fig. 3. 

 1894. Crihnlina punctata, Levinsen, Zool. Dan., Mosdyr, p. GI, pi. v. 



fig8. 13-18, &c. 

 1900. Cribrilina jnmctata, Waters, " fSryozoa Franz-Josef Land," 



Journ. Linn. Soc, Zool. vol. xxviii. p. 02, pi. viii. iig. 22. 



Front wall vrith lacunes of considerable size, arranged in 

 transverse rows, not usually more than four in a row, 

 between the marginal lacunes riblets may or may not be 

 developed in young zooecia on the lumen-line of the bars ; 

 lower lip of oral aperture considerably pouting outwards 

 and unusually thick ; in the centre at the junction of the 

 bars the mucro may be single or double. No central longi- 

 tudinal keel. Ocecia in quite young cells with a strong 

 frontal arched rib, behind which the ooecium itself lies at a 

 lower level. Lateral avicularia with mandible pointing 

 upwards and slightly outwards, almost invariably present on 

 both sides of the oral opening. 



Such is the character of zocecia just built up at the 

 edge of the zoarium. Only a few cells further in it will 

 be found that the whole ooecium, except the front arched 

 rib, has been hidden and buried under the nodulous growth 

 of what Levinsen would call a " kenozooecium," and which 

 seems to be representative here of the avicularium often 

 developed in the same situation in C. punctata. 



In old zooaria overgrowth has taken place in a very 

 remarkable manner, Avhich, when fully developed, is only 

 faintly realized in such a drawing as my fig. 2. Tlie appear- 

 ance assumed is extraordinary. The most prominent feature 

 is the great massive under lip, above this is the strongly 

 developed front rib of the ooecium, above this again another 

 transverse rib (sometimes divided across the middle into 

 two), which is the outgrowth of the kenozooeciura over the 

 ooecium concealed below. Then all the lumen-lines of the 

 bars have been raised into ribs of such a size that the 

 lacunes arc almost entirely hidden between them. 



