NO. 1442. JAMES TYPES OF BRYOZOA^BASSLER. 39 



also would apply equally to most of the species of Ceramoporella and 

 related genera, the name had better be abandoned. Further remarks 

 on this species are o-iven in the discussion of Qeramopora nichohon i . 



FISTULIPORA SILURIANA James. 



Flstulipora nilnriana James, PaleontologiHt, No. 3, 1879, p. 19. 



In the revision of the Monticuliporidse in 1888, James and James 

 concluded that this species was a synonym of O. nicholsoni and repre- 

 sented a stage in which the intercellular spaces were thick and the 

 interstitial cells few in number. The type lot contains typical speci- 

 mens of the following-: 



(1) Four specimens of Ci'raiaoporella distincta Ulrich from the Eden 

 shale at Cincinnati or vicinity. 



• (2) One specimen of Goeloclema eoinmnne Ulrich from the Economy 

 member. 



(3) Two specimens of Chilojjorella flabellata Ulrich from the Corry- 

 ville member. 



The original diagnosis is of little value, and moreover is not ])orne 

 oat by the majority of the type specimens, the first four specimens 

 having thin-walled zooecia and rather numerous mesopores instead of 

 the opposite. The same reason for abandoning the name mav be 

 invoked here as in the case of F. multipora and C. nieholscml, both of 

 Vvhich see for further remarks. 



HELOPORA APPROXIMATA James. 



Helopora approximata James, Paleontologist, No. 1, 1875, p. 3. 



Original description. — "Associated with this species {Helopora 

 parv%d({\ are cylindrical examples with one or two more rows of cells, 

 and htdhous upper terminations; the bulbs carry very small pores, 

 which are not on other parts of the fossil; in other features they 

 do not seem to difi'er from H. parvuli. Should these prove, on 

 further investigation, to be distinct, I propose the name Helopora 

 ap2)roximata. " 



The writer has failed to find specimens having the characters men- 

 tioned above either on the slabs containing the types of Ifelopora par- 

 vula or in the rest of the collection. However, specimens of small 

 Species of Bythopora are often found showing a bulbous extremit}^ as 

 described by James, and undoubtedly he had some of these before 

 him. This bulbous extremity is probably due to abortive growth 

 following some injury and since it is occupied solely b}^ small cells 

 may be regarded as analogous to the expanded base of the zoarium. 



Helopora ap>pro,m>nMta is probably a synonym of the common Utica 

 form, ByfJiopora arctipora (Nicholson), but in the absence of the types 

 or other specimens bearing this name it is impossible to decide the 



