NO. 2 BRACHIOPOD SUPERFAMILY STENOSCISMATACEA GRANT 1 53 



to shape of outline of camarophorium, outwardly and ventrally bowed ; 

 camarophorium deep, spoon-shaped, with anterior median projection ; 

 intercamarophorial plate short, low, may be buried in callus ; median 

 septum high, thin, rather short on floor of valve, length increasing with 

 height. Muscle marks in camarophorium faint ; pallial marks on floor 

 of valve with vascula media diverging anteriorly from edge of median 

 septum, each trunk bifurcating two or three times, finally splitting into 

 many small apophyses near valve margins. 



Type species. — Torynechus caelatus Cooper and Grant, 1962, p. 

 1129. 



Comparisons. — Torynechus is characterized by its fine, numerous, 

 intercalating and bifurcating costae that begin at the beaks, rather thick 

 pedicle beak without sharp beak ridges, somewhat swollen brachial 

 beak, fold that is high at commissure but does not stand prominently 

 above flanks behind commissure, flattened anterior and anterolateral 

 surfaces with each costa there deeply grooved, commissure with rudi- 

 mentary stolidium, hinge plate with thick cardinal process, and a large 

 camarophorium as in Stenoscisma. Internally, the genus most nearly 

 resembles Stenoscisma, although the camarophorium is deeper and the 

 intercamarophorial plate is shorter. It differs externally from Steno- 

 scisma in its greater number of finer costae, flattened anterior surfaces, 

 and rudimentary stolidium. Externally, Torynechus is similar to Rhyn- 

 chopora, differing in its impunctate shell, thicker pedicle beak without 

 prominent beak ridges, less elevated brachial valve, more swollen 

 brachial beak, intercalate costae, and by its deeply grooved costae on 

 the anterior levigate surfaces. Internally the two genera are entirely 

 dissimilar. 



Torynechus also resembles Septacamera Stepanov, and probably is 

 fairly closely related to that genus. It differs from the Russian genus 

 in its more nearly flat anterior surface produced by sharp corners on 

 the shell, its much more numerous and bifurcating costae, and the 

 slightly protruding valve edges that probably represent the remains of 

 a relict stolidium. As far as can be determined, the two genera are 

 nearly alike internally, although if in fact Septacamera has lateral 

 buttress plates to the spondylium, they constitute a further generic 

 difference. 



Discussion. — Robert E. King (1931) established the genus Uncinu- 

 loides for Rhynchonella guadalupae Shumard ( 1859) and for the speci- 

 mens from the Glass Mountains which he (King, 1931) and Girty 

 (1909) assigned to that species. Shumard's holotype was lost, ap- 

 parently even at the time of Girty's writing, and Girty also lost his 

 specimen from the Glass Mountains, composing its description from 

 memory. King's specimens from the Glass Mountains are from a much 



