510 APPENDIX. 



of the peduncle of the superior antennae, when the latter is 

 deflected in the same line. The segments of the pereion 

 and the anterior three of the pleon are subequal ; the three 

 posterior segments of the pleon very short; and the fourth 

 and fifth dorsally produced into a tooth. 



The superior antennae have the first joint of the peduncle 

 thick, and as long as the cephalon, with the upper surface 

 anteriorly produced into a scale-like process, quite as far as, 

 if not beyond, the distal extremity of the third joint of the 

 peduncle ; second joint with the upper surface anteriorly 

 produced like the first ; third not so produced ; flagellum 

 short, consisting of four or five articuli. The inferior antennae 

 are short, having the peduncle longer than the flagellum ; 

 flagellum consisting of four articuli; and the whole organ 

 not reaching beyond the extremity of the first joint of the 

 peduncle of the upper antennae. The first pair of gnatho- 

 poda have the propodos but little longer and not broader than 

 the carpus ; anterior and posterior margins subparallel ; palm 

 slightly oblique, and defined by an acute tooth ; dactylos short 

 and curved. The second pair of gnathopoda have the propodos 

 shorter than the carpus, anterior and posterior margins curved, 

 sub-parallel ; digital process short and conical ; dactylos not 

 longer than the digital process of the propodos, conical, curved. 

 The pereiopoda are short, robust, subequal last pair slightly 

 the longest ; third pair having the coxa quadrate, half as deep 

 as that of the preceding ; basos circular, as deep as the coxa ; 

 meros posteriorly produced to a thin angular plate. The 

 fourth and fifth pairs differ from the third in being less robust 

 and slightly longer. The rami of the three posterior pairs of 

 pleopoda short. The telson has not been made out. 



Taken at Banff by Mr. Edward, associated with Anonyx 

 longicornis, with which it is very closely allied, being perhaps 

 a young female. 



ANONYX LONGICOENIS (vol. i. p. 91). The absence of a secon- 

 dary appendage to the upper antennae must separate it from 

 the genus Anonyx, to which it is assigned in the body of the 

 work. We therefore arrange it in the present genus in 

 consequence of its near affinity with the last species. 



