OAMMAHIDJC. 107 



daetj-loH. Second pair of gnathopoda chelate ; propodos long and 

 narrow, cylindrical ; carpus produced one-fourth beyond the ex- 

 tremity of the dactylos, and enlarged at the apex. Two anterior 

 pairs of pereiopoda subequal, having the dactylos minute ; the 

 anterior distal extremity of the propodos furnished with a brush 

 of hairs. Tliii'd and fourth subequal, having the basos oval ; the 

 meros posteriorly and distally dilated and produced ; carjDUS pos- 

 teriorly and distally produced ; dactylos short ; distal posterior 

 extremity of the propodos furnished with a brush of hairs. Pos- 

 terior pair of pereiopoda a-s long again as the preceding ; basos 

 narrower ; mcros not so dilated nor produced ; carpus not pro- 

 duced ; dactylos long, straight, fringed with hairs, and tipped 

 with one long and straight spine. Posterior pair of pleopoda not 

 so long as the preceding ; rami equal. Telson concave above, and 

 fiinged ■with hair. 

 Length -^ths of un inch. 



Hah. Sandy shore near Sunderland {Mr. A. Hancock), where it 

 was observed to make peculiar furrows, which have been described 

 and figured by its discoverer in a paper " On cei'tain Vermiform 

 Fossils," &c., Ann. Nat. Hist. Dec. 1858, and Tyneside Nat. Field 

 Club, vol. iv. pt, 1. p. 17. pi. 4: also Cumbrae, near Glasgow {Mr. 

 Robertson). 



23. AMPHILOCHUS, n. g. 



Cephalon produced, anteriorly depressed. Eyes two, posterior to 

 the superior antenna;. Superior antenna) not ai)pendiculated. 

 Gnathopoda subehelate ; in both, the carpus is inferiorly produced. 

 Pereiopoda subequal ; coxae of the third pair not so deep as the 

 preceding. Posterior pair of pleopoda double-branched (?). Tel- 

 son single. 



This genus Ls distinguished from Monocuhdes by having two 

 eyes situated laterally, from Krot/cra by having the second pair 

 of gnathopoda not chelate, and from both by the shortness of the 

 posterior pair of pereiopoda. 



1. Amplulochus manudens, n. s. (Plate XVII. fig. 6.) li.M. 



Cephalon anteriorly depressed, not incun'ed. Eyes round. Superior 

 antenna; longer than the inferior; peduncle longer than the 

 flagellum. Inferior antenna; having the peduncle nearly as long 

 as the peduncle of the superior ; flagellum scarcely longer than the 

 last joint of the pedimcle. First pair of gnathopoda liaving the 

 propodos hjng, narrow, tapering ; superior edge prodiiced anteriorly 

 beyond the articulation of the dactylos in the form of u tootli ; 



