ANTARCTIC BRYOZOA — ROGICK 289 



The primary orifice is smittinoid, its distal half a wide low arc, its 

 lides narrowed by tall palisade ledges or cardelles, its proximal wall 

 Vith a distinct, squared lyrula separated on each side from the cardelles 

 )y a medium-sized sinus. The lyrula is only a short distance from the 

 )ral avicularium and peristomial sinus and can be easily seen from 

 .he outside, thus differing markedly from Smittinella rubrilingulata, 

 vhose lyrula is buried deep in the orifice. 



The operculum is delicate, only lightly chitinized around the rim. 



Features making this species distinct from others of the Smittina in 

 he collection are the height of the cardelles compared with the lyrula 

 •ind the considerably elevated, petallike, trilobate peristome. 



OvicELLs: Unknown. 



Distribution and Ecology: Both the holotype (USNM 11316) 

 md para type are from Station 44. The former consists of about 100 

 ;oids and encrusts a reteporid bryozoan which, in turn, is growing 

 )ver a colony of Emballotheca phylactelloides. A calcareous worm 

 ,ube, a hydroid stalk, and Foraminifera grow over the Smittina. 

 The paratype is an old ivory-colored scrap of two zoids. 



Affinities : The absence of an ovicell makes determination of rela- 

 donships a bit difficult. However, in the form of the excessively 

 'ieveloped peristome this species resembles Peristomella monstruosa 

 Huge 1946 but differs from it in having a tremocyst, while P. 

 •nonstruosa has a solid nonporous frontal (pleurocyst?). Smittina 

 ilticollarita resembles Osbm-n's (1952, pi. 47, fig. 1) specimen of 

 Smittina landsborovii as to aperture shape but the avicularia of the 

 '}wo species are different. Also, S. alticollarita has a more elevated, 

 jetallike peristome. Jullien (1888, pp. 54-55, pi. 2, fig. 4) described 

 I Smittia 'purpurea which has a porous frontal, raised mural rims, and 

 I pronounced peristomial collar, but its avicularium differs from that 

 ')f Smittina alticollarita in being within the peristomial boundaries, 

 mclosed by the peristome frontally. Brown (1952, p. 323) comments 

 :hat Jullien 's S. purpurea is not the S. landsborovii var. purpurea of 

 aincks, 1881. 



Smittina canui, new species 



\ Plate 25 



Diagnosis: Zoarium encrusting. Zooecial frontal wall a tremocyst 

 mih. many medium-sized pores. Raised peristome interrupted proxi- 

 nally by a small elliptical oral avicularium. Mandible tongue shaped. 

 Secondary orifice shaped like a sector of a chcle. Primary orifice 

 smittinoid, with broad low lyrula and cardelles. Ovicell thick, 

 globose, and perforated by many medium-sized pores. 



This species is named in honor of Dr. F. Canu who, in collaboration 

 with Dr. Bassler, produced a number of excellent bryozoan monographs 

 that have been of immense service to all present-day bryozoologists. 



