327 



structure, propodos comparatively small and oblong oval in form, carpus rather 

 elongated, and forming inferioiiy a short setous expansion. Pereiopoda, 

 uropoda and telson of the usual structure. 



Remarks. - - As stated by the Rev. Mr. Norman, the genus Westwoodilla 

 of Sp. Bate is in all probability identical with the genus Haliwcdon of 

 Boeck. But as Sp. Bate founded his genus upon a misapprehension, believing 

 the 1st pair of pereiopoda to be the posterior gnathopoda, and as he, moreover, 

 subsequently describes the same form, upon which the genus was founded, as 

 an (Ediceros, the generic name Westwoodilla cannot properly be retained, 

 though it certainly is much older than that proposed by Boeck. As to their 

 outward appearance, the species of this genus bear a strong resemblance to those 

 of the genus Monoculodes. They may, however, be readily recognized by the 

 rather different structure of the gnathopoda. The genus comprises as yet 4 

 northern species, to be described in the sequel. 



25. Halimedon Miilleri, Boeck. 



(PL 115). 



Halimedon Molleri 1 ) Boeck, Crust, amph. bor. & arct. p. 89. 

 Syn : Westwoodilla caecula, Sp. Bate. 

 Westwoodilla hyalina, Sp. Bate. 

 CEdiceros parvimanus, Sp. Bate. 



Body moderately slender, with the segments sharply defined, and the 

 anterior part of the body rather tumid, especially in the ovigerous female. 

 Cephalon exceeding in length the first 3 segments of mesosome combined, 

 frontal part considerably produced and strongly vaulted above at the tip, 

 rostrum very short, horizontal, projecting beneath the vaulted part of the front, 

 lateral corners of cephalon terminating with a somewhat upturned acute angle. 

 First pair of coxal plates considerably expanded in their outer part, forming in 

 front a broadly linguiform lobe covering over the buccal area, distal edge slightly 

 arcuate and densely setous; the 3 succeeding pairs successively increasing in size; 

 4th pair quadrangular in form, and about as deep as the corresponding segment, 

 infero-posteal corners nearly rectangular; 5th pair considerably broader than 

 the 4th and nearly as deep. Eyes of moderate size and oval in form, placed 

 within the strongly vaulted terminal part of the front, pigment light red. 

 Superior antennae in female rather slender, equalling in length the cephalon 

 and the first 3 segments of mesosome combined, 2nd joint of the peduncle 



') In his great work 011 the northern Arnphipoda Boeck himself changed the specific name 

 Molleri to Miilleri. 



