12 F. A. SMITT, 



obvious. The stem, of course, is thicker, because, when in the preceding species we 

 only counted about 8 lumina of zooecia in the transverse section of the stem, here we 

 find them varying about 18 and 20 in the middle part of the branches and rauch more 

 numerous just below the bifarian bifurcations or the sometimes (probably before the 

 beginning of the bifurcate growth) thickened tips of the branches. The ooscia show 

 the near aftinity with the Proboscina - - for comparison I will point to my lig. 30 and 

 Savigny, Description <le VEgypte, Polypes, Pl. VI, tig. 5,2 — and sometimes (see tig. 29!) 

 \\ r e are reminded by their form even of the Crisiece. 



As to the name of this species, I have chosen the oldest one given to the living 

 European form, because, in the descriptions of that form, I can tind no discrepancy 

 from the Floridan specimens. The iigure by Johnston seems to indicate a verticillate 

 arrangement of the zooecia, instead of the irregular spiral; but if this had been a cha- 

 racteristic feature, Couch, Johnston or Heller had without doubt remarked it in their 

 descriptions. And D'Orbigny also identitied specimens of this species from the French 

 coast with those from New-Foundland. I regret, however, not to have any European 

 specimens for comparison. 



With reference to my former : ) interpretation of the relations, that exist between 

 the Scandinavian forms of the family 



LICHENOPORIDiE, 



it will be easily seen, how in relation to these we have to place the Floridan form, 

 that I received for examination in a single specimen, growing on a fragment of a shell 

 brought up from a depth of 130 fathoms. It is to be named 



Discoporella clypeiformis 2 ) (Pl. IV, tig. 31), 



because it presents no remarkable difference from the description and tigures given by 



I)'0rbigny of a form brought up from a great depth at the Falkland-Islands. The 



only reasonable objection against that identitication should be taken from the greater 



extent of the central depression in the Floridan form (see tig. 31). But the same 



proportional difference we tind between the young and more developed colonies of 



Discoporella verrucaria 3 ). I can, however, of course compare it with more certainty 



with the Scandinavian form, that I have named Discoporella crassiuscula. This is dis- 



tinguished from the other forms principally through the thickness of the interstitial 



walls, and therein the Floridan form almost entirely agrees with the Scandinavian. 



Tubulipora defiexa, Couch, Vorn. Fn., part III, p. 107, tab. XIX, fig. 4. 



Pustulipora deflexa, Johnst., l>rit. Zooph., ed. 2, p. 279, tab. XLVIII, fig. 5; Hellek, Bryoz. Adr. Meer.. 



Verh. K. K. Zool.-bot. Ges. Wien, XVII Bd., 1867, pag. 125; Norm., Rep. Brit. Assoc. 18G8, p. 310. 



An Pustidipora tubulosa, Hag., Bryoz. Maastr. Kreideb., p. 16, tab. I, fig. 2? 

 Entalophora gallica, DOrb., Pal. Franc, Terr. Gret., tome V, p. 781. 

 Pustulopora clavata, Busk, Cray. Polyzoa p. 107, tab. XVII, fig. 1. 



An Entalophora punctulata Gabb et Horn, 1. c, p. 17 1, tab. XXI fig. 61? 

 ') Krit. Fört., 1. c, pag. 475 etc. 



2 ) Tubidipora clypeiformis, DOrb., Voy. d. VAmér. Mer., Polyp., pag. 19, tab. IX, fig. 4 — 6. 

 Unicavea clypeiformis, id., Pal. Franc, Terr. Cret., tome V, pag. 972. 

 An Discoporella crassiuscula, Smitt, Krit. Fört., 1. c. pag. 406? 

 :i ) Krit. Fört, 1. c. tab. X, fig. 8 and tab. XI, fig. 4. 



