110 ]\Ir. W. H. Baily on new Species of Coal-measure Crustacea 



posterior extremity. Tail or caudal portion small, with a few 

 slight radiating divisions, to which is articulated an elongated 

 spine {telson). 



Belinurus Regime, n. sp. PI. V. fig. 1 A-D. 



Diagnosis. — B. latus, limbo scuti cephalic! orbiculari, angulis longi- 

 spinosis ; corpore decurtato ; thorace quinque articulis longi- 

 spinosis ■munito ; pleuris sulco longitudinali, usque ad finem spiuae 

 producto ; tripartita cauda, cui spina preelonga coaptatur. 



Description. — General form broadly ovate, acuminate poste- 

 riorly; axis convex. Cephalic shield three and a half times as 

 broad as long, bow-shaped anteriorly, and surrounded by a nar- 

 row and flattened margin ; the posterior angles produced into 

 long spines, which are directed outwards ; central portion, or 

 glabella, smooth and moderately convex, of the same breadth as 

 the axis of the thorax at its junction, but decreasing gradually 

 towards the anterior margin, having an arched division on each 

 side extending towards the anterior margin. Eyes central, 

 lunate, attached to these divisions. Thoracic rings [somites] five, 

 the lobes of the first twice as broad as the axis, those of the last 

 rather less in breadth than the axis, the lateral lobes extending 

 in a straight line, each being furrowed and terminating in a 

 spine, the length of which diminishes in regular gradation to- 

 wards the tail ; each of the rings of the axis bears a moderate- 

 sized tubercle. Tail or caudal portion very small, having about 

 three slightly marked divisions on each side, to which is ap- 

 pended or articulated (?) an extremely long spine [telson], being 

 three times the length of the other portion of the animal, broad 

 at the base, and tapering gradually to a point. 



Remarks. — The little Crustacean to which 1 have given the 

 above specific name (PI. V. fig. 1 A) was found by me in the debris 

 of the same coal-pit which yielded the next species ; it is in a 

 very perfect condition, and exhibits in a remarkable manner the 

 extravagant development of its various segments into long spines 

 spreading out on each side of the body, and gradually decreasing 

 as they approach the tail, from which proceeds an enormous 

 spine. These characters sufiiciently distinguish it from any 

 other species. The head and body in the specimen figured ap- 

 pear to have been a little squeezed together. Another specimen 

 of what I believe to be the same species (fig. 1 B), obtained by 

 ]Mr. John Edge, is still more perfect, with the exception of the tail- 

 spine, a portion of which has been broken away : this specimen is 

 enlarged at fig. 1 C, D, and shows a slight wrinkling or furrowing 

 of the expanded margin of the cephalic shield, as well as the 

 sulcated pleurae and single tubercle upon each ring of the axis 

 terminating in a larger and more obtuse prominence on the tail. 



