300 CANON A. M. NORMAN ON TIIE POLYZOA 



round at different stages of growth ; a round aviculariuni is situated within 

 tlie lower lip. The surface is slightly rough, imperforate and very glossy in 

 the living state ; when dead a row of pores can be made out round the 

 margin. I have not seen ooecia, and Calvet writes in the 'Caudan^ paper: 

 " Ooecies invisibles exterieurement, mais tr^s apparentes sur les coupes dans 

 le zoarium ; elles sont globuleuses et communiquent avec Forifice tubulaire." 

 They are thus buried ooecia such as 1 have found in other species and 

 designated ' cryptic ooecia ' (Ann. & Mag. Nat. Hist. ser. 7, vol. xii. 1893, 

 p. 115). 



POKELLA TORQUATA (J. Calvet). (PI. 39. figS. 5-8.) 



1903. Cryptella torquafa, L. Calvet, Result. Camp. sci. Priuce de Monaco, fasc. xxiii. 

 Bryoz. prov. camp, de 1' ' Hirondelle,' p, 77, pi. 7. fig. 5. 



Fragments of this species were dredged by me in about 70 fathoms at 

 Madeira in 1897, Last spring Senhor De Noronha kindly gave me a very 

 fine specimen which he had procur-ed from about 60 fathoms at Porto Santo. 

 This specimen measures one and a hnlf inches high and slightly more in 

 breadth, and consists of very numerous dichotomously dividing branches, 

 which all curve with the tips slightly inward, and while their inner faces are 

 devoid of zooeciaj the outer sides are thickly studded with them. The zooecia 

 are smooth, with a row of punctures round the margin, and generally a few 

 scattered on the face, and here and there an occasional minute ovate 

 avicularium, situated sometimes by the side of the oral opening, at others on 

 the face of the zooecium. The oral opening is subquadrate, with a small 

 rounded avicularium just within the lower straight lip. The ocEcium is 

 tumid, as wide as the zocEcium and imperforate. The dorsal side is mapped 

 out into divisions by impressed lines, and is studded with numerous small 

 pores. When ooecia are developed and partially overhang the oral opening, 

 the lower lip is at the same time often raised so as to conceal the oral 

 avicularium. 



This P. torquata with its frondose but not bushy growth, and its zooecia 

 confined to one" face of the branches, recalls to my mind that form of P. Icevis 

 which is found in some of the western fiords of Norway. This variet}' 

 instead of, as typically, forming a little bush and with zooecia developed round 

 its diverging branches and rosy in colour, has its branches developed almost on 

 one plane, zooecia on one face only, while the other is entirely without them 

 and the colour is white. This variety (or possibly species) I have named 

 P. Icevis var. gymnonoton. The zooecia of this northern form are in general 

 characters similar to those of P. torquata ; but the zoarium is much more 

 strongly built, and in many minute details there is evidence of specific 

 distinction. 



