PLATE lY. 



Gnathophcmsia calcarata, G. 0. Sars. 



Fio;. 1. Adult male, from right side ; very slightly magnified. 



Fig. 2. Same, from above. 



Fig. 3. Carapace of another somewhat smaller specimen, from below, a, supra-orbital 

 spines (1) ; h, antennal spines ; c, branchiostegal spines. 



Fig. 4. Anterior part of body, from below, exhibiting eyes, antennulse («',), antennae (a^, 

 anterior lip (L), mandibles {M), mandibular palps {Mp), second pair of 

 maxillse {m~), with their exognaths (^), and the pigmented basal protuber- 

 ance (ic), maxillipeds {mp'), with their rudimentary exopodite {p). 



Fig. 5. Antenna, with scale and proximal part of flagellum. 



Fig. 6. Last caudal segment, from below, exhibiting the confluent epimeral plates. 



Fig. 7. Extremity of tail, with caudal fan, from above. 



