TETEOMATUS. 171 



As onyx dentictjlatus, Spence Bate. — Posterior and 

 lower end of the ninth and tenth segments from the head 

 produced into a tooth-like process. 



Moray Firth (Eev. Mr. Gordon) ; Banff (Mr. Edwards) . 



Gen. 68. TETEOMATUS, Spence Bate. 



Head projecting forwards into a snout; eyes four, not 

 compound ; upper antenna in advance of the lower, proceed- 

 ing from the end; lower situated far behind. Mandible 

 with palpus ; jaw-feet imperfectly prehensile. 



Tetromatus typicus, Spence Bate. (Plate X. fig. 4.) — 

 Head and front segments much compressed ; upper antenna 

 half as long as the lower, the latter the length of the ani- 

 mal ; hind margin of the tenth segment from the head not 

 ornate. 



Moray Eirth (Eev. Mr. Gordon) ; Plymouth (Messrs. 

 Smyth and Bate) . 



Tetromatus Bellianus, Spence Bate. — Upper antenna 

 not so long as the peduncle of the lower ; hind margin of the 

 tenth segment from the head ornate. 



Moray Eirth (Eev. Mr. Gordon) ; Plymouth Sound (Mr. 

 Spence Bate). 



