ARKIV FÖR ZOOLOGI. 



BANU 3. N:o 11. 



A iiew species of Fossil Limiiliis from tlie 

 Jurassic of Swedeii. 



By 

 ROBERT TRACY JACKSON. 



Communicated March 14th b v G. Holm. 



On a recent visit to Berlin, Prof. Dr. Otto J^kel very 

 kindly turned över to me for stiidy an interesting fragment 

 of Limulus from the Liassic sandstone at Hör in Scania, 

 where it had been found at Stanstorp by Mr F. J. Blom- 

 QUIST during the summer of 1904. 



The specimen was sent to Professor J^kel by Profes- 

 sor Nathorst. It is evidently a new form and I describe 

 it as such. It may be questioned whether it is desirable to 

 publish a new species from such a fragmentary specimen, 

 but the fact that Limulus is an exceptionally interesting 

 genus, both to the palaeontologist and the zoologist, also 

 that there are only three or four distinct fossil species known 

 makes a new form of considerable interest. At present only 

 one species is known beloAv the upper Jurassic, and that spe- 

 cies, Lirmdus priscus, is known only from a single specimen. 

 All the fossil Limuli so far knowo have been found in Ger- 

 many, so that this is the first occurrence from another 

 country. 



Limulus Nathorsti, sp. nov. Fig. 1—2. 



The specimen is a sandstone cast of a portion of the 

 right dorsal side of a large cephalothorax. It is not com- 

 pressed or distorted in any way, and represents a full, rounded, 



Arkiv för zoologi. Bd 3. N:o 11. 1 



