('/(it/iitiu lf<Ltml (iiid iC L I iillf Isl mil. I'l 



tijiiira ; var. inu/tifii; var. luiiif'iroslriit \ but whether tlicy are 

 callid spcries or varieties is nut a matter- of great importance. 

 However, in all the cliaraeter ot" tlie ai)ertnre and peristome 

 shows considerable variation, so that there is n(j great break 

 between the varieties. 



in the Chatham- Ishmd specimen there are l.'J tentacles. 



Hah. Mannganui, Chatham Island. Tlie group occurs 

 from Australia, iNcw Zealand, S. Africa, Kerguclen, I'aia- 

 gonia, Japan. 



Dlastopuni sp. 



In a specimen from Mannganui, Chatham Island, the 

 aperture of the zocecia is 0*ll-0"l:i mm., which is about 

 double the size of that of D. conc'iniui, Macd., fi'om Cape 

 Horn, and is larger tlian that of I), lutomaryinutit, d'Orb., 

 from Naples. 



There arc no ovicells and I do not sec any closures. The 

 zooeciu arc free for a hnig di>tanci', but the semiradiate 

 character of 1). /afomai't/inulu is wanting. \\ itliout ovicells 

 tlie detcrminaliou is uncertain, but it is much like 

 D. latuiiiaryinulu. 



Pluinatella princeps, Kraepelin. (PI. I. figs. If, 15.) 



I'linitrili'l/a })ri)t<op<, KvM'y^Ww. !)!•■ deiitsclicu Siij.swiUi^ei-brvozocn, 

 p. Ill) (1887). 



The zoarium covering a piece of wood forms a pretty solid 

 mat about 4 mm. thick, resembling P. ae.yntoaa in ap[)ear- 

 ance. Usually the branches dichotomize, but a few grow at 

 right angles. At the growing end the zooecia are trans- 

 parent, so that looked upon from above the zoarium has a 

 hyaline appearance, while lower down the cuticula is thick 

 and dark brown ; but this dark cuticula is only a continuation 

 of the transparent hyaline cctocyst. The zooecia arc about 

 0'8 mm. wide. 



The statoblasts are very large, some measuring as much as 

 0*7() mm. X ()".'3j mm., namely, in the proportion 1:2, and 

 this is larger than any statoblasts mentioned in Kraepelins 

 tables or elsewhere, so far as I am aware. However, 1 have 

 some PlmiKitflln rtyens, L., from the Davos Lake, Switzer- 

 land, anil from the Laret Lake near Davos w hicb have larger 

 statoblasts than are mentioned by Kraepelin. A ^cw stato- 

 blasts from Chatham Island without the swim-ring (annulus) 

 measured Oil mm. x 0*20 mm., namely, in the pioportiou 

 of I : i'7. Whether these arc merely partly developed 

 statoblasts or winter statoblasts is not quite clear. 



