REVIEWS 97 



Continuing with the new species: Rhipidomella jerseyensis, R. 

 tenuicostata, Sckizophoria chouteauensis, S. Sedaliensis, S. poststriatula, 

 Camerotoechia subglobosa, Allorhynchus acutiplicatum, Rhychotreta elonga- 

 tum, R. missouriensis, Tetracamera miss our iensis , Rhynchophora ? rowleyi, 

 R.? perryensis, Centronella louisianensis . 



Under the Terebratulidae a new genus, Centronelloidea, is erected. 

 "In its external form this genus is like Centronella, but its brachidium is 

 essentially like Dielasma, although the development of the crutal lamellae 

 in the rostral portion of the brachial valve is entirely different from that 

 genus." T. rowleyi is the only known species. 



Cranaena globosum, C. sulcata, Dielasma chouteauensis, D. osceolensis , 

 D. sinuata, D. inflata, D. illinoisensis , D. arkansanum, D. subspatulatum, 

 Girtyella cedar ensis, G. intermedia, Dielasmella calhounensis , A try pa 

 infrequens, Spiriferina saleminsis, Delthyris similis, Spirifer shepardi, 

 S. platynotus, S. biplicoides, S. legrandensis , S. crawfordsvillensis, S. 

 washingtonensis , S. pellaensis, S. breckenridgensis , S. marshallensis , 

 S. floydensis, S. indianensis, S. maplensis, S. subrotundatus n. nom., S. 

 gregeri, S. rowleyi, S. montgomery ensis, S. calvini, Brachythyris burling- 

 tonensis, B. gurleyi, B. altonensis, Cyrtina inexpectans, Syringothyris 

 bushberger ensis, S. newarkensis, S. platypleurus, S. solodirostris. 



The genus Pseudosyrinx is erected "to include a group of spiriferoid 

 shells with high cardinal area, punctate shell structure, and distinct 

 delthyrial plate which differs from that in Syringothyris in the entire 

 absence of a syrinx upon its inner surface." Genotype, P. missouriensis. 

 Other species are: P. keokuk and P. gigas, Spiriferina latior. 



The genus Acanthospira differs from Spiriferina in the possession of a 

 non-punctate shell and the absence of a median septum in the pedicle 

 valve. It differs from Spirifer in the possession of fine spines. The 

 genotype and only species known is A. rowleyi. The remaining new 

 species described are: Martinia sulcata, Ambocoelia unionensis, Reticu- 

 laria salemensis, Eumetria acutiro strata, Nucleospira rowleyi, Cleiothy- 

 ridina glenparkensis, C. lenticularis , C. scitula, C. laevis, C. pentagona, 

 and C. globosa. 



There is no table showing the range of these species through the rocks 

 of the Mississippian formations. This table would be of great assist- 

 ance to stratigraphic geologists and paleontologists as well. Indeed the 

 reviewer was tempted to prepare one and insert it in the review, since 

 many of the species have a very limited range. However, it will probably 

 accompany a study of the Mississippian formations at a later date when 

 it will be more appropriate. J. W. B. 



