12 H. Woodward — New Lias Crustacean. 



the species found in Bavaria. The second pair of limbs (h) are 

 much thicker, and are furnished with long and tapering chelce. The 

 third and fourth pairs of appendages (c and d) are also chelate, but 

 are much shorter and more robust than the preceding pair. The 

 extremities of the fifth and last pair of legs (e) are extremely long 

 and slender and are destitute of clieli^ or setce. 



The antennge are but imperfectly preserved, but portions of their 

 many -jointed filaments may be seen at Ji ; there is also a scale-like 

 body seen at g, which was no doubt attached to the base of the 

 outer antenna. This lamellar appendage is not shown in emj 

 Solenhofen example of the genus ^ger. A dark oval spot {i) , just be- 

 neath the projection formed by the rostrum, indicates the position of 

 the eye (see also woodcut, fig. 1). 



The carapace has been slightly displaced by pressure, in an 

 upward direction, as is usually the case in the fossil Macrura, both 

 from the Lias and the Lithographic stone. That portion of the 

 shield which would have covered the hrmicMcs, or gills, being 

 absent, the internal vertical walls (formed by the re-duplication 

 and infoldings of the shelly portion of the thoracic segments) 

 to which the muscles of the limbs are attached, are exposed 

 to view. 



The branchial and nuchal furrows can be traced upon the surface 

 of the carapace, and also an oblong ridge, or tubercle (similar to 

 that in JEger tijpularis, see woodcut fig. 1), near the eye, in the 

 hepatic region. The surface of both the carapace and abdominal 

 segments is smooth, and destitute of ornamentation. The 1st 

 abdominal segment is imperfect, but the epimeral borders of the 

 2nd and 3rd segments are rounded, whilst the 4th, 5th, and 6th 

 are broadly falcate, with their points directed backwards. The 

 exterior caudal plate is long and slender, with a groove down 

 its centre, and appears to be divided near the extremity by a trans- 

 verse line of articulation or suture, marked by a small spine on the 

 border as in the Astacidce. The inner caudal plate is smooth, and is 

 not divided at its extremity. The central plate is narrow, and 

 ornamented with two deep grooves ; the extremity is pointed. 

 Parts of four or five pairs of the false abdominal swimming-feet 

 (Plate L, /) are also preserved upon the surface of the slab. 



The specimen figured in our plate is the only example I am 

 acquainted with from the English Liassic formation. In compli- 

 ment, therefore, to the discoverer, Mr. J. W. Harder, of L3^me 

 Eegis (a well-known local geologist and earnest collector of Lias 

 fossils), I have named it j3^ger Marderi. 



The present well-marked genus offers another connecting link 

 between the Crustacean fauna of our Lias, and that of the Upper 

 '^Vllite Jura of Germany. 



In my Eeport to the G-eological Section of the British Association 

 this year, I have recorded six genera (namely, five Decapods — 

 El-yon, Palinurina, ^ger, Glyphcea, and Pseudoglyplicea ; and one 

 Stomapod of the genus Squilla, or Scidda), as occurring both in 

 England and Bavaria, and represented in this country by no less 



