42 PROCEEDINGS OF THE NATIONAL MUSEUM. 



the Richmond group and is found generally in abundance wherever 

 these strata are exposed. The species lua}" be distinguished from 

 associated brj^ozoa by its sharply tuberculated branches, while vertical 

 fractures examined under a hand lens Avill show the cystiphragms in 

 the peripheral region of the tubes and other features characterizing 

 Ho-motryija. 



Orcarreiuw. — Richmond group, Whitewater member. The types 

 are from Lynchburg, Ohio, but the species is abundant at many locali- 

 ties in Ohio and Indiana and notal)ly so at Richmond, Indiana, and 

 A^icinity. 



LEPTOTRYPA CLAVACOIDEA (James). 



Clueteteft rlavacoidens James, Catal. I^owi'i- 8il. Fohs., 1871, p. 1 (iiained only); 



Catal. Fos8. Cincinnati group, 1875, p. 1. 

 Mniillciilipora [Monolnjpa) rlaiKicoldeit Nicholson, (xenns ilonticulipora, 1881, 



p. 182, fig. 37. 

 Leptotrtfpa clavacoidea Ulrich, Jour. Cincinnati Soc. Nat. Hist., VI, 1883, p. 159. 

 Mnnticnlipora clavacoidea James and James, Jour. Cincinnati Soc. Nat. Hist., XI, 



1888, p. 25.— J. F. James, Jour. Cincinnati Soc. Nat. Hist., XVIII, 1895, p. 84. 



The club-shaped zoarium and the absence of mesopores cause the 

 recognition of this species to be comparatively easy. James gave a 

 brief description in 1875, but the knowledge of the species is really 

 based on Nicholson's full description and figures published in 1881. 



Occurrence. — An abundant and characteristic fossil of the Corrj^ville 

 member, McMillan formation, Cincinnati and vicinity. 



LIOCLEMELLA SUBFUSIFORMIS (James). 



Plate VII, figs. 4-7. 



Monticidipofa {? Monotrypa) sxlifusifdnnis James, Paleontologist, No. 6, 1882, p. 52; 



No. 7, 1883, pi. I, fig. 1. 

 Monticnliporafusifurmls (not Whitfield sp. ) James ariul James, Jour. Clincinnati 



Soc. Nat. Hist., XI, 1888, p. 26.— J. F. James, C"inciiinati Soc. Nat. Hist., 



XVIII, 1895, p. 83. 

 Liocleniella subfimformis i:iiCKLES and Basslkr, Bull. T. S. (ieoi. Surv., No. 173, 



1900, p. 308. 



James and James in 1888" regarded this species as synonymous with 

 Whitfield's ^LonticrLliporii fw^ifoniih^^ but a comparison of specimens 

 of the latter with the types of M. ,^nhfi(xif()niiis shoAVs that ^^'hitfiel(^s 

 species has a much larger zoarium, con.spicuous and nlnnerous acan- 

 thopores, more rounded zo(»cia, and many more mesopores. 



Zoarium small, generally le.ss than 18 nun. in length, club shaped, 

 pointed at the lower end probably for articulation with a basal expan- 

 sion, expanding slightly toward the upper portion. Surface smooth, 

 macuhv inconspicuous. Zod'cia small, 10-12 in 2 mm., angular, thin- 

 walled, sometimes in contact but generally separated by thin-walled, 



"Jour. Cincinnati Soc. Nat. Hist., XVIII, 1895, p. 83. 

 6 Ann. Rep. Geol. Surv. Wisconsin for 1877, 1878, p. 70. 



