liiil: iiiJiy lio waiitiiiii. h;i\iiii.' a .iinimildsc cIiarMclcr. an iiKldiiiilc (Hitlino, 

 ami no coiitral iK'rfuratidU ; iiK'sitpoii's are variable in iimuher ; diapliraKins 

 occur in both sets of tubes. The zoaria consist of frond, ramose, massive, 

 ianiinale and incrusting types. 



.^fovfiriilipora intcrmta, IJlrioh and I'assler. IMate IV, Kijxs. \-'l. 'I lu- 

 /oariuiu consists of parasitic expansions. 1 (o .". nun. tliick. witli faintly dis- 

 liMi,'nislied clusters of larjjer zooecia on the surface. 



Tlie zooecia are tliin walled and anj^ular with tlic usual ^^ninular wall 

 si rnclui-e. 



'I'lie diaphragms and cystiphragms are crowded much as in M. (lisruUi 

 except that the opening left by the cysti])hragms is nearl.v always open on 

 one side and subtriangidar in shape. Mesopores are abundant and closely 

 tabulated, having generally three diaphragms in the same distance in which 

 two cystiphragms occur in the zooecial tubes. Acanthopores are wanting. 



Occurrence: Pierce limestone. Murfreesboro. Tennessee. 



Holotype: 43S7S, I'. S. Nat. Mus. 



MoiiticiiUpora (Jixcuhi. Ulrich and Basslcr. IMate IV, Figs. '5-4. The 

 zoarium forms small discs that are attached to foreign bodies. They are 

 less than 12 mm. in diameter and about .5 mm. in thickness. The zooecia 

 are thin walled, angular, and nine of the average size occur in 2 mm. A 

 cross-section of the cystiphragms tangentially forms large oval openings. 

 The zooecial tubes are crowded wdth diaphragms (3 to 4 in a tube diameter). 

 Acanthopores are apparently wanting. Mesopores are very few and occur 

 in clusters only. 



Occurrence : IMerce limestone. Morfreesboro, Tennessee. 



Holotype: (103) U. S. Nat. Mus. 



Mwitirulaijora compucta. Ulrich and Bassler. Plate IV, Figs. 5-6. The 

 colon.v grows into an upright ramose zoarium with compressed solid 

 liranches. The sui-face is even with iiiiiculac of the larger zooecia rather 

 indistinct. 



There are eight to nine apertures in 2 ram. The wall and acanthopore 

 structure is similar to the M. incompfa. The acanthopores are strong, oc- 

 curring at most angles of the zooecia and in various horizons within the 

 axial region of the zooarium. 



Mosojiores are few and scattered. 



lHapbragms and cystii»hr;i.srms are closely crowded, 2 to 3 in a tube di- 

 ameter in the axial region and becoming more numerous towards the sur- 

 face where there are from 25 to 30 in 2 mm. 



Occurrence: Pierce limestone. Murfreesboro, Tennessee. 



Holotype; (21) U. S. Nat. Mus. 



(loius Orhigni/eUa, Ulrich and Bas.shr. Genotype: Orbignyella subla- 

 niellosa Ulrich and Bassler. Orbignyella Ulrich and Bassler, Smiths. Misc. 

 Coll. (quart, issue), 47, 19(V4. p. 18. Bassler, Bull. U. S. Geol. Surv.. 292, 

 T.HIt;. p. 2G; Bull. U. S. Nat. Mus.. 77, 1011. pp. ISl. 1S2. 



-Monticulipora (part) T'lricb. .Tour. Uinciiuiati Soc. Nat. Hist.. 5, 1822, 

 iV. 153, 232; Geol. Surv. Illinois, S, 1S9(), pi). 370, 407. 



