40 Mr. J. W. Jackson on Lusitanian 
IV.—On the Occurrence of Lusitanian Brachiopods in the 
Persian Gulf. By J. Wiurrip Jackson, F.G.S. (Man- 
chester Museum). 
SomME months ago I received from Dr. J. Cosmo Melvill a 
small box containing brachiopods from the Persian Gulf. 
These had been obtained by Mr. F. W. Townsend in the 
course of his dredgings for Mollusca in that region. The 
locality on the box containing the specimens is Dabai, which 
lies within the Persian Gulf on the N.W. coast of Oman. 
Its exact position is on the west side of the peninsula of Ruus 
El Jibdél, on what is known as the Pirate Coast. Unfortu- 
nately, no particulars as to depth etc. accompanied the 
specimens. 
With the exception of the Mollusca and some Madreporarian 
corals very little appears to be known of the fauna of the 
Persian Gulf. The Mollusca have been ably dealt with in a 
series of papers by Messrs. Melvill and Standen *, and the 
corals were described in 1911 in a paper by Miss Ruth 
Harrison T, to which Professor 8. J. Hickson added some 
further notes f. 
The discovery of Brachiopoda in the Persian Gulf is of 
very great interest, not only from the fact that these speci- 
mens are the first of the class to be recorded from this region 
—i. e., the N.W. corner of the Indian Ocean (including thie 
Persian Gulf, Gulf of Oman, and Arabian Sea) ,—but more 
especially from the important bearing of these specimens on 
the subject of the relation of the fauna of the Persian Gulf to 
that of the Mediterranean Sea and Atlantic Ocean. 
Four specimens only were present in the box, one of which 
is a Terebratulina, the other three belonging to the genus 
Mihlfeldtia. All are dead empty shells, and asmall quantity 
of greyish marl was present in the interior of one or two. 
Unfortunately, in the case of the Terebratulina, the brachidium, 
or loop, is broken, but the shell is otherwise quite perfect, 
both valves being present. In form and size it is very like 
aspecimen of Terebratulina caput-serpentis figured by Fischer 
and Oelhlert from the ‘ Talisman’ Expedition in the Lusitanian 
Subregion §. It has the same general outline and is cut off 
* For list of papers see Proc, Zool. Soc. 1906, p, 783. 
+ Proc. Zool. Soc. 1911, pp. 1018-1037. 
+ Id. 1911, pp. 1037-1042. 
§ Fischer and Oehlert, ‘ Expéditions Scientifiques du ‘Travailleur’ et 
du ‘Talisman’ ete.,” Brachiopodes, 1891, pl. ii. fig. 4, v. 
