70 F. A. SMITT, 



above we have described on the Escharella bisinuata. This last character, allowing for 

 the agreement of this species, in other points, with the Discopores, rather will be ac- 

 counted for as an anomaly from the generic type than to give reason for establishing 

 it a new genus. It is the reason, also, why I dåre not to identify this species with 

 the Reptoporina eustomata, by Gabb et Horn *), although in the worn zooecia it is löst, 

 and very often, through the projecting avicularium, it is concealed. 



After the PouETALES-collections to judge, the Discopora advena, in the Floridan 

 sea, seems rather to be uncommon, as it was taken, by him, in two colonies only 

 which both want the oaacia. In the British Museum I have seen it from the Chinese 

 Sea, 20 miles north of Mino-Sima. 



Discopora albirostris (Pl. XII, figs. 233 — 239). 



Char.: Zooecia rhombica vel ovoidea frontem prasbent convexam, aperturam semi- 

 ellipticam, margine proximali concavam, margine distali et laterali setis marginalibus 

 8 — 2 coronatam vel la? vem; aviculario ad aperturam obliquo in rostri formam erecto 

 muniuntur. Avicularia lateralia vel acuta, extus vergentia, in media longitudine fron- 

 tis zooeciorum exsistunt vel majora, spathulata vel acuta, magnitudine interdum zooeci- 

 orum, inordinatius inter zooecia sparsa sunt. 



1. Forma pusilla (fig. 233). 



Char.: Zooecia minima coloniain crustaceam vel in capituli cylindrici coloris ebur- 

 nei formam ei"ectam exstruunt, frontem praebent nitidam vel impressionibus, si levis sit 

 calcificationis, punctatam vel verrucis minimis, si durioris sit calcificationis, granulatam, 

 aperturam prsebent setosam (setis usque ad 8 coronatam) latitudine 0,oo — 0,09 mm., avi- 

 culariis acutis muniuntur, qua? tamen interdum deficiunt. Ocecia elevata, valde aperta, 

 in colonia erecta exsistunt. 



Hab.: Colonias quasdam parvas colonia? mortua? valde erosa? formas sequentis in- 

 sidentes in prof. 9 orgyarum cepit Pourtales; coloniam erectam testa? mortuas insiden- 

 tem in profunditate 60 orgyarum invenit. 



2. Forma typica 2 ) (figg. 234—239). 



Char.: Zooecia frontem prsebent imperforatam vel ad margines porosam, aperturam 

 bispinosam vel Irevem praebent, latitudine 0,14 — 0,?s mm.; aviculario rostrali mandibulo 

 obtuso clauso, subtus in latere rostri calcarei, teretis, saspissime acuti posito muniun- 

 tur. Avicularia majora spathulata (vel longius producta mandibulo acuto clausa) inter 

 zooecia distributa sunt. 



Hab.: In prof. 25 — 35 orgyarum sat frequentem hane formam crustaceam (Le- 

 praliam, auett.) vel Hemescharai (auett.) modo expansam cepit Pourtales. E mari prope 

 Sydney (Australia?) apportatam in Museo Brittico eam vidi. 



1 ) Journ. Acad. Nat. Se. Philad., vol. V, p. 144, tab. XX, fig. 26. 



2 ) ? Cellepora cucullina Mich., Ico?wgr. Zoophytol. p. 324, tab. 77 fig. 13. 



? Cellepora ceratomorpha, Reuss, Foss. Polyp. Wien. Tert. Beck, p. 80, tab. IX fig. 25. 

 ? Cellepora Mspinata, Busk, Cat. Mar. Polyz. Brit. Mus., p. 87, tab. CXX figg. 1 et 2. 

 ? Cellepora mamillata, Id, ibid., tab. CXX figg. 3 — 5. 



