140 AMIMIIPODA NOUMALIA. 



a spiiiulc. Antennae subccjual, liaving the jjcduuclo of the inferior 

 considerably longer than that of the superior. Three posterior 

 pairs of pJeopoda unequal, the fourth and sixth being much longer 

 than the fifth. 

 " Length 5 lines. 



*' Hah. South of Europe." — Itisso. 



11. Atylus bispinosus. (Plate XXVII. fig. 1.) B.M. 



Dexamine bispinosa, Spence Bate, Synopsis, 8fc., Ann. Nat. Hist. B^eb. 



1857. 



Wliite, Hist. Brit. Crust, p. 178. 



(jephalon produced into a small flat rostrum. The first two seg- 

 ments of the pleon dorsallj produced posteriorly into strong teeth ; 

 the third ha\'ing the posterior lateral margins ornately waved and 

 serrated. Eyes broad-ovate, white, with a central black spot. 

 Antenna3 long, slender : superior pair half the length of the animal, 

 having the peduncle scarcely longer than the cephalon ; inferior 

 pair two-thirds as long as the animal, ha\'ing the peduncle reaching 

 a little beyond the peduncle of the superior. Gnathopoda subequal, 

 uniform, having the propoda scarcely broader than the carjji ; 

 palmse oblique, fringed with unequal spines ; daetyla amied with a 

 single tooth parallel \\ath, and near the apex, and two small hairs. 

 Posterior pair- of pleopoda reaching considerably beyond the two 

 preceding pairs. 



Length i of an inch. 



Hah. Plymouth, dredged on a sandy bottom iu Whitsand Bay near 

 the Eame Head (T. P. Smi/th and C. S. B.); Penzance {Mr. Harris) ; 

 Moray Frith (Eev. O. Gordon) ; Macduff (Mr. Oregor) ; Falmouth 

 and Tenby {Mr. Webster) ; Northumberland {Mr. Alder). 



Under the microscope the integument is seen to bo profusely 

 covered with minute scales, each forming a small segment of a circle, 

 The colour of the animal, when alive, was a greenish-grey, mottled 

 Avith black and yeUow pigment-ceUs, particularly along the line of the 

 alimentary canal and upon the dorsal surface of the pleon. 



12. Atylus simplex. (Plate XXVII. fig. 2.) 

 Iphimedia simplex, Dana, U.S. Explor. Exped. p. 920. pi. 63. f. 2. 

 " Body compressed, naked. Eyes round. AntennDe nearly naked: 

 inferior pair half as long as the body ; base short, less than half 

 the length of the flageUum; articuU of flageUum transverse : supe- 

 rior pair a little shorter than inferior ; base scarcely shorter than 

 base of inferior ; a few articuli at remote intervals produced below. 

 Propodos of first pair of gnathopoda moderately small, narrow- 



