456 Rev. Canon A. M. Norman on British Schisopoda 



Fara. II. Euphausiidae. 



MaxilUpeds elongate, pcdiform ; exopodite well developed, 

 epipodite rudimentary or wanting. Legs without dactylus, 

 ])osterior pairs more or less imperfectly developed. Branchi?e 

 wholly exposed to view. p]gg-pouch, when present, not 

 formed of plates attached to bases of legs. Caudal limbs 

 (pleopods) well developed in both sexes. Phosphorescent 

 organs present at the bases of the first and of the penultimate 

 legs and also on the abdomen between the paii-s of pleopods*. 

 Inner uropods not furnished with an auditory apparatus at 

 their base. Telson very slender and tapering to an acute 

 point, giving off on either siele at a short distance from the 

 extremity a very large spine-formed process, which extends far 

 beyond the end of the telson itself. 



Fam. III. Mysidae. 



Maxillipeds strong, with exopodite well developed, nata- 

 tory, and the epipodite lanceolate and projecting within the 

 branchial cavity. First legs differing from the following, 

 used as gnathopods; remaining legs slender, usually without, 

 rarely with, a terminal nail. No true branchiai present. 

 Marsupial pouch usually composed of two or three pairs t of 

 leaf-like processes springing from the hinder pairs of legs. 

 Pleopods in female small and rudimentary, in male natatory 

 and often remarkably modified to assist in copulation. Inner 

 uropods with an auditory apparatus at the base. No phospho- 

 rescent organs. Telson very variable in form, but never as 

 in the Euphausiidae. 



Fam. I. Lopliogastridae. 



Genus Lophog aster, M. Snrs. 



Carapace tridoutato iii front, the lateral teeth as imicli 

 devehiped a.** the central, this portion of carapace 

 advanced in front of the eyes, tlie pednncles of wliicli 

 an* completely concealed hv it, and the eyes tlieni- 

 selves are protruded ou either side. Peduncle of 



* The genus Benthciq)]iau^ia is, however, not furnished with these 

 orpaus. 



t In the genus Bureminj^ix there are seven ^mirs. 



