Review of Recent Geological Literature^ 183 
get-like particles and crystals, the latter showing the combination of 
the cube and octahedron. c. H. w. 
Thomsonite, mesolite and cliabasite from Golden, Colorado. By Hor- 
ace B. Patton. Bull. Geol. Soc. Ant., vol. 17, pp. 461-474. pis. 
43-49. 
The paper gives a detailed description, supplemented by excellent 
plates, of the occurrence and habits of the above named zeolites, found 
in a scoraiceous band of the basalt fiow^ which caps what is known as 
Table mountain near Golden. c. H. w. 
Beitr'dge zur Burtheiling der Brachiopoden. Von Dr. F. Huene. 
(Centralblatt fur Mineralogie &c., 1901.) 
This pamphlet is a critical review of the studies of F. Blochmann 
on the Brachiopoda, and a comparison of his results with those of 
Beecher and Schuchert. 
The part of these studies so far published refer to Discina, Dis- 
cinisca Lingula and Crania and they bring to light some important 
characters in the morphology of the Inarticulata not heretofore reo« 
ognized. The reviewer lays considerable stress upon an important dis- 
tinction between the Articulata and Inarticulata in the properties of the 
pedicle. In the latter division the motions of the pedicle are auto- 
matic and it has no attached muscles, in the former the pericle itself is 
immobile, and its motions are governed by muscles attached within 
the shell. 
Another important point brought out by Blochmann is that the 
opening of the valves in the Inarticulata is effected by the contraction of 
the "Cutanei" or muscles of the body- wall which by squeezing the 
viscera and cavity in which they are contained, force the valves apart; 
he claims that the internal muscles have very little power for this 
purpose. 
Another important observation of Blochmann is that the pedicle is 
a continuation backward of the ventral valve, and is in organic con- 
nection with it; the supporting substance of the pedicle within its 
cuticle being an extension of the body-wall of the brachiopod. 
Blochmann finds that the circulation of the mantle in the sinuses 
&c. is of a respiratory nature, and shows how the observations of 
Morse of two inlet and one outlet current in Lingula are in accord- 
ance with his observations. There is no venous circulation in these 
passages, the blood being contained in tubes of microscopic size. 
The notation for the muscles in Blochmann's work differs from 
that lately current in English literature. The only laterals recognized 
are the "j" laterals; the other laterals with the transmedians are 
"oblique." As the pedicle is automobile, no muscles are required for it 
within the shell, and the connected threads are "nervi." 
The observations in this review are made more instructive by a 
number of figures in the text, cited from Blochmann's work, and 
showing the various points of structure discussed in this review. 
Dr. von Huene directs deserved attention to the important work of 
Beecher and Schuchert on the classification and morphology' of the 
