Review of Recent Geological Literature. 315 
from the genus Schizodus to warrant the erection of a new genus 
Toechomya with the Brazilian species T. rathbuni (M), (directly com- 
parable to Sch. tumidus of the Cornif. limestone) and T. freitasi (M). 
Two species of Sphenotus Sph. bodenbenderi (M) and, Sph. groceixi 
(E), a close ally of the species S. cuneatus and S. triincatus of the 
Hamilton fauna), and two representatives of the Devonian genus 
Cimitaria; C. karsteni (M) and C. sp. (M), complete the list of the 
Trigonidse. A single, not quite perfect valve from Maecuru suggests 
both the genera Nyassa, Hall and Guerangeria Oehlert (N. and G. or- 
toni). Cypricardella occurs in two species: C. hartti (M), one of the 
large complanate tenuistriate forms of the Corniferous, Hamilton and 
Spiriferen-sandstein groups, and C. pohli (M). Several large .Gram- 
mysias assist in giving the fauna of Maecuru a typical Devonian as- 
pect, viz. Gr. pissisi, similar to the Hamilton species G. alveata; Gr. 
burmeisteri, Gr. lundi, Gr. gardneri, Gr. ulrichi and Gr. sp. Hartt 
and Rathbun referred a fossil from Erere to Pholadella parallela of the 
Hamilton shales, and Mr. Clarke abides by this determination. This, 
as well as Edmondia sylvana H. et R. (E) are figured. One of the 
best represented families of lamellibranchs is the Nuculidas, for we 
find described and figured: Nucula bellistriata Conr. var. parvula (M., 
and Hamilton shales); N. kayseri (E); Nuculites smithi (M), which 
presents some similarities with N. oblongatus from the Hamilton 
group; N. ererensis, H. et R. (E); N. nyassa, Hall, var. majora sp. n. ; 
and N. branneri (E); Palaeoneilo orbignyi (M); P. sulcata, H. et R. 
(E); P. pondeana. H. et R. (E); P. ? simplex, H. et R. (E); P. sp. 
(E), and Leda diversa Hall (E, and Hamilton shales). 
At the end of the descriptive part, the author remarks on the ex- 
ceedingly rare occurrence of bryozoans in these Devonian rocks, only 
a few fragments of Fenestella (probably F. parallela Hall, from the 
Upper Heldcrberg) and a Reptaria (perhaps identical with R. stolo- 
nifera Rolle from the Hamilton shale) having been collected. 
The most interesting part of Mr. Clarke's paper is his concluding 
discussion of the interrelations of the faunas of the Rios Maecuru and 
Curua and the Erere-Monte Alegre district, and of their degree of 
equivalence with faunas of other regions. The detailed study of the 
Brachiopoda of Erere by Messrs. Hartt and Rathbun already deter- 
mined the similarity of the fauna with that of the Hamilton shales 
and sands of New York. Also the earlier age of the Maecuru and 
Curua sandstones and the correspondence of their faunas to the Upper 
Helderberg was determined by Mr. Rathbun's study of the Brachio- 
poda. The trilobites of the sandstone of the Rio Maecuru have been 
described by Mr. Clarke (Archivos do Museu Nacional, vol. viii), who 
pointed out their strong early Devonian traits as well as the fact that 
as no other clement of the fauna bears so strongly the impress of the 
earliest Devonian, this expression of the trilobitic element of the Mae- 
curu fauna afTects the time value of the entire faunal association. In 
striking contrast to the great development of the cephalopods in the 
lower and middle Devonian of other latitudes, these shells are entirely 
