114 AMrHH'ODA NOUMALIA. 



^anshiro (Mr. M. Mo<jijvi<hje and C. >S. D.). It burrows in the sands 

 bi'tAvet'U tido-niarks, and leaves tracks upon tlie surface Mliicli are of 

 interest to the geologist. These have Ijeen described ])y Mr. Albauy 

 Hancock in a pajier " On certain vermiform fossils found in the 

 ^lountain Limestone districts of the Xorth of England," read at the 

 meeting of the Ihntisli Association at Leeds in 1858, and pubHshed 

 in tlie ' Annals of 2\ atural History ' and in the ' Transactions of the 

 Tyneside Xaturalists' Field Club.' 



29. UROTKOE. 

 Urothoe, Dana, U. S. Etplor. Ejcped. p. 920. 

 Eyes two, lateral. Coxa; veiy large; fifth pair very small. Gnathopoda 

 slender, subchelate. Superior antenna; appendiculate. MaxLUipcds 

 ha-s-ing the propodos long, and dilated anteriorly ; carpus dilated 

 internally and anteriorly ; the lamella; of the iscliium small, of the 

 basos i-udinientiuy . Posterior paii' of plcopoda two-branched, veiy 

 long ; branches foliaceous. Telson double. 



1. Urothoe Bairdii, n. s. (Plate XIX. fig. 1.) P.M. 



Cephalon not produced into a rostrum. Eyes round, small. Superior 

 antenna; haring the peduncle not longer than the peduncle of the 

 inferior ; flagellum nearly as long as the peduncle ; secondary ap- 

 pendage half as long as the primary. Inferior antennae one-third 

 as long as the animal ; flageUum nearly three times as long as the 

 peduncle, the proximal joints not longer than broad, the distal joints 

 gradually increasing in length to the apex; peduncle fiu'nished along 

 the superior margin with strong spines and long haii-s. Gnatho- 

 poda uniform ; first pair a httle the larger ; carpus not longer 

 than the propodos, a httle dilated posteriorly ; propodos gradually 

 increasing in width anteriorly ; pahn convex, not defined ; inferior 

 angle rounded, cihated. Two anterior pairs of pereiopoda subequal, 

 unifonn ; pro^jodos slightly dUated anteriorly, fiu-nLshed with two 

 or three spines ; dactylos straight, serrated posteriorly. Third 

 pair of pereiopoda having the basos quadi'ate ; meros and carpus 

 short, broad, round, fuimshed posteriorly with fasciculi of long 

 plumose hail's ; carpus fiu'nished with two or three rows of short 

 stiff spines ; ])ropodos nearly three times as long as broad, ha's'ing 

 three long plumose hau-s, two on the anterior and one on the 

 posterior margin, and two long straight spines at the distal ex- 

 tremity of the propodos ; dactylos long, culti^iform. Foiu'th and fifth 

 pairs of pereiopoda unifoi'm ; coxae small ; basos oblong quadi-ate ; 

 meros and carpus not so broad as in the third pair of pereio- 

 poda : propodos cyhndrical, ciliated anteriorly ; dactylos straight, 



