P.EYOZOA FEOItf XEW ZEALAXO. 



347 



to decide upon the importance of the difference between the reticu- 

 lated and the merely perforated crust. 



22. Lichexopoea boletipoemis (d'Orb.). 



Liclienopora boletiformis, "Waters, Quart. Joum. Geol. Soc. vol. xl. 

 p. 695, pi. xxxi. figs. 20, 21. 



A specimen from Waikato, with the zoarium in a single layer 

 and confluent subcolonies, and with the biserial rays much raised, 

 surrounding a depressed central area, appears to be this species. 

 The openings are all about the same size, mostly about 0*15 millim. 



23. LlCHEXOPOEA HOULDSWOETHII (Busk). 



Discoporella Houldswortliii, Busk, Cat. Mar. Polyzoa, pt. iii. p. 33, 

 pi. xxx. fig. 4. 



A recent specimen from Port Western, in Miss Jelly's collection, 

 has the " denticles " to which I referred (Bry. Xaples, p. 276, 

 pi. xxiv. fig. 11) with very distinct knobs ; but the shape I cannot 

 make out, as it would be necessary to break up the specimen. This 

 is no doubt what Mr. Busk means by stellate pores ; but the 

 expression might have a different meaning ; comparison, however, 

 with the British-Museum specimen has established the identity. 



The zocecial tubes are about 0*07 millim., and the cancelli about 

 0'08-0'09 millim. in diameter, with denticles in all the tubes. The 

 fossil from \Yaipukurau corresponds in the size of the zoarium and 

 in the characters. 



This resembles Hadiopora Fraacquana and Uaicavea collis, d'Orb. 

 (Pal. Ft.). 



Loc. Living : Ceylon (B.) ; Port \Yestern (Victoria). Possil : 

 Waipukurau. 



24. Peptocavea aspeea, sp. nov. (PI. XV 111. figs. 10 & 13.) 



The greater part of a small oyster-shell is thinly incrusted with 

 this species. The zocecial tubes rise but very slightly from the 

 general surface, having the side of the peristome which is -directed 

 away from the growing edge slight!}* raised and acuminate ; between 

 these are small interstitial pores. 



Xear the border of the zoarium, and occasionally elsewhere, 

 radial bilaminate ridges rise from the surface, with zocecia on each 

 side corresponding to those of the basal structure. Usually, the 

 ridges rise but very slightly (not more than 1 millimetre), though 

 in one case a narrow foliaceous expansion rises 4 millim. above the 

 surface and is 7 millim. wide. The minute structure resembles parts 

 of Liclienopora hispida, and on that account the specific name is 

 chosen. The growth, however, is that of Diastopora or Mesenteripora. 

 In the interior of the zocecial and interstitial tubes there are slight 

 elevations, which no doubt represent the well- developed " rays " of 

 Entalopliora intricaria, &c. There is a recent form from Xew 

 Zealand, which is at any rate closely allied. This last, however, is 

 bilaminate, the lamina?- being large and contorted, the colony 



