172 Mr. Broderip on some Fossil Crustacea and Radiata 



collecting- is only equalled by the liberality with which he applies the riches 

 of his museum to the advancement of science. 



Since the above was written^ Mr. Lonsdale forwarded to me another spe- 

 cimen from LymCj which upon examination turned out to be a young indivi- 

 dual of the same species, having the post-abdomen or tail in situ, and the other 

 parts comparatively perfect. This specimen, which is in the Museum of the 

 Geological Society, so entirely corroborates the view which I had formed 

 from the examination of Lord Cole's large specimen, that I have only found it 

 necessary to add the description of the post-abdominal segments*. 



COLEIA. 



Generic Character. 



AntenncE. Base of Mesial antennae (antennae internae) not extending beyond the anterior spine 

 of the thorax ; each antenna terminated by two annular setae, the external setae being the longest. 

 External antennae provided with a large and wide scale ; the terminal setae large, but the length 

 undetermined. 



Eyes, pedunculated, directed outwards, approaching in their situation and form to those of 

 Palinurus. 



Thorax (carapace), thin, divided transversely by furrows indicating the different regions, tuber- 

 culated, spinous at the sides, and with three deep emarginations anteriorly, the middle one the 

 largest, each of the four anterior angles produced into a strong spine. 



Feet. First pair long, slender, the cubit (cubitus) with small spines or serrations on the in- 

 ternal margin, and terminated externally by three strong spines. Hand (manus) elongated, 

 slender ; digits slightly incurved, filiform, unarmed, pointed. 



Post-abdominal segments, tuberculated and strongly marked by transverse ridges. Caudal 

 lamella? approaching in their form to those of the salicoques or shrimps. 



Species. Coleia antiqua. 

 Mus. Cole. PI. XII. fig. 1, 2. 



Found in the lias at Lyme Regis by Miss Anning. 



I have next to notice a fragment of the post-abdomen of another macrou- 

 rous decapod, approaching in its sculpture nearest to Palinurus. This crus- 



either of the figures which now illustrate this part of the paper published. M. Milne Edwards 

 in giving the description seems to think that the carpus, not the cubitus, was intended by the 

 author, when he describes the joint as having small spines or serratures on the internal margin, and 

 as being terminated by three strong spines ; for M. Edwards writes, " le cubitus (Carpe ?) garni 

 de petites epines," etc. It is the cubitus that is so armed. (Sept., 1837.) 



* This interesting specimen was the property of Alfred Cloyne Austen, Esq., F.G.S., who left 

 it with Mr. Lonsdale to be described. When Mr. Lonsdale informed him that it was introduced 

 into the plate illustrating this little memoir, he most liberally presented it to the Geological 

 Society. 



