46 
(2) As related to LeiomyaUna are also quoted Sangiiinoliles Etheridgei, 
De Koii.d Sangimiolites curvatus, De Kon./* * Mytilus Bigsbyi, De 
Kon.,^ and Mytilus crassiventer, De Kon.^ — wliieli appear to us 
l)eyond all doubt to represent genera widely separated from 
LeiomyaUna {Eurydes77ia). 
Finally, he states that L. antarctica is, perhaps, identical with 
Eurydesma glohosum, Dana/ 
1903 . — Freeh’s last description of LeiomyaUna had hardly appeared 
when Professor G. Boehm, who had made collections of Eurydesma and tlie 
associated fossils, at Maria Island, Tasmania, opposed the establishment of 
LeiomyaUna on the ground' of its identity with lie says: — 
“ What I had assigned to the genus Eurydesma, Mr. Freeh refers to his 
genus or subgenus LeiomyaUna and, “ already (in 1902) I have stated, before 
Frieburg geologists, that according to my views, LeiomyaUna may be united 
with Eurydesma." ® 
Boehm considers that the three forms which Freeh, in bis second 
article, unites under L. a^itarcUca, belong perhaps to three, but certainly to 
two perfectly distinct species. He further criticises Freeh’s reference of 
Eurydesma elUpUcum, Dana, to Cardiomo 7 'pha , and asks in what character 
is this species “ generically distinct from the other thret'.” ^ Having examined 
Freeh’s material, Boehm disputes the presence of a hinge-tooth in the left 
valve of Leiomyalinn anta^^ctica, characterising the statement as “particularly 
inaccurate ” ; he, however, generally endorses the interpretation of the hinge 
characters given by Dana and Waagen. 
According to Freeh, as we have already seen, the chief peculiarity of 
LeiomyaUna is the extended, broad, flat surface under the cartilage area — to 
this, Boehm applies the term “ hinge plate,”** and states that he was 
“ unable to observe a decided flat surface, either in the illustration or in the 
specimens in the Hamburg Museum.”** Boehm also opposes the fresh-water 
origin of Eurydesma suggested by Noetling.*** 
' Op. cit., p. 124, PI. XVI, fig. 2. 
Op. cil., p. 126, PI. XVII, fig. 4. 
* Op. cit., p. 150, PI. XXI, fig. 1. 
3 Op. cit., p. 150, PI. XXI, fig. 2. 
‘ Dana — Wilkes U.S. Explor. Expecl., X, (Ceol.), p. 700, pl. VII, f. 7. 
^ Boehm — Centialblatt Min. Geol. Pal., 1903, pp. 296-300. 
* Boehm — Op. cit., p. 297. 
’ Boehm — Op., cit. p. 298. 
* Boehm — Op. cit., p. 299. 
“ Freeh — Leth. Pal., loc. cit., p. 600, fig. a. 
Freeh — Leth. Pal., loc. cit., p. 641, f. n. 
