H5 



Diaslopora sarniensis Hincks, 1884, "Pol. Oueen Charlotte Islands", Ann. Mag. Nat. Ilist. 



(5) XIII, p. 206. 

 Diastopora sarniensis Hincks, 1887, "Pol. Adriatic", Ibid. (5) XIX, p. 30S. 

 Diastopora sarniensis MacGillivray, 1887, McCov's "Prodr. Zool. Vict.", Dec. XV, p. 181, 



PI. CXLVII, figs 4—4/;. 

 Diastopora sarniensis Kirkpatrick, 1890, "Hydr. Pol. China Sea", Ann. Mag. Nat. Hist. (6) V, 



pp. 17, 22. 

 Diastopora sarniensis Calvet, 1902, "Bry. Mar. Corse", Trav. Inst. Zool. Montpellier, (2) Mém. 12, 



p. 42. 

 Diastopora sarniensis Jullien and Calvet, 1903, Rés. Camp. Prince de Monaco, XXIII, p. 117. 

 Diastopora sarniensis Calvet, 1907, "Bryozoaires", Exp. Sci. Travailleur et Talisman, VIII, 



p. 465. 



Mr Waters (1887, "Tert. Cycl. Bry. New Zealand", O. J. Geol. Soc, XLIII, p. 342) has 

 recorded Diastopora sarniensis, var. perangusta from New Zealand, both recent and fossil; but he 

 states that the zooecia are only about half the size of those of typical D. sarniensis from Guernsey. 



81. F. Stat. 105. 6°S'N., 121 19' E., 275 Metres ; coral-bottom. 



566. F. Stat. 204. Between Islands of Wowoni and Buton, N. entrance of Buton Strait, 



75 — 94 Metres; sand with dead shells. 

 551. C. Stat. 310. 8° 30' S., ii9°7'.5E., fi Metres; sand with a few pieces of dead coral. 



And (Mus. Zool., Cambridge) : — 



Japan, Uraga Channel, off Tokyo, 80 fathoms; A. OwSTON Coll., 28. H., Reg. June 23, 1902. 



Zoarium somewhat irregular in form, sometimes flabellate. Marginal lamina variable. 

 Zooecia quincuncial, not in radiating series, peristomes free. Occlusion of the orifices partial, in 

 the form of a transverse calcareous plate from which rises a short, narrow tube which remains 

 open at its free end. Ovicells not forming a continuous ring ; not broader than long, or not 

 much broader than long. Ooeciostome centrally placed, near the distal end, but looking 

 somewhat proximally. 



The present species, which I am unable to distinguish from the European B. samiejisis, 

 originally described by Norman from Guernsey and Jersey, is represented by only a few specimens 

 in the 'Siboga' Collection. In its young state (566. F.) the colony may commence with a narrow 

 Sfo/nafopora-\ike portion, which after a time bifurcates, at rig'ht angles, into two lobes, at an 

 angle of 1 8o° to one another. In the specimen described, one of these lobes has hardly developed, 

 while the other remains quite flabellate (fig. 5). In a later stage of growth (fig. 4) the colony is 

 more discoidal, but with an irregular outline. The zooecia show none of the radial arrangement 

 which characterises B. lineata, but are arranged quincuncially. Their proximal parts are depressed, 

 as in the other species; but their distal parts rise into free peristomes, which do not become 

 connate. In the 'Siboga' specimens, very few of the orifices are occluded, and the marginal lamina 

 remains narrow. In the specimen from Japan, all the centrally placed zooecia are occluded ; 

 and, in correlation with this fact, the marginal lamina is broad, no doubt indicating a rapid 

 production of new zooecia to take the place of those which are being occluded. 



The "closure" of the zooecia takes the form which is well known in British specimens; 

 a calcareous plate being formed across the orifice, and giving oft" a short, open tube, of small 

 diameter. Two such "closures" are seen in fig. 5. The small tube is generally given off from 

 the distal half of the calcareous plate. 



