60 THE ROYAL SOCIETY OF CANADA 



of the body, wider than long. The abdomen is small, very weakly 

 two-lobed. The egg strings are long, much longer than the body, 

 nearly the same size throughout but tapering slightly towards the 

 distal end ; the eggs are arranged in five rows. 



The first antennae are large and rounded, with the joints fused 

 except for one indication of a division, which corresponds to the distal 

 one; the terminal joint is tipped with three small spines and another 

 small one appears about half way along. The second antennae are 

 large and stout, tapering gradually but with no abrupt bend near the 

 tip. Mandible curved and tapering, with the surface supplied with 

 rows of short spines. The first maxilla has a stout base and slender, 

 curved, terminal joint, with three curved teeth near the distal end 

 of the convex side, the most distal being the largest; there is a stout 

 spine on the basal joint projecting parallel to the terminal joint. 

 The maxilliped has a stout basal joint that narrows abruptly just 

 near the distal end; the terminal joint is also quite stout; the spine 

 is stout and straight and the end of the joint projecting beside the 

 base of this forms a rough knob. Each of the free thoracic segments 

 has a pair of bilobed appendages. 



Total length 6-2 m.m., length of céphalothorax 1-6, width 1-9, 

 greatest width of body 3-7, length of egg strings 7-3, width 0-9. 



Male: — Body short and stout. Céphalothorax inflated, three- 

 fourths as deep as wide. Second thoracic segment somewhat dis- 

 tinctly separated from the céphalothorax, much narrower than it is. 

 The other free thoracic segments are shorter and narrower than the 

 second. The genital segment is greater in each measurement than 

 the last thoracic segment. The abdominal segment is about half the 

 width and half the length of the genital segment. The anal laminae 

 are slender, without setae. 



The first antennae are stout, almost to compare with those of the 

 female; the joints are more definitely marked and there are more 

 setae on the terminal joint. The second antennae are more curved 

 than in the female. The maxilliped has no rough knob on the terminal 

 joint beside the spine. The other mouth parts are much similar to 

 those of the female. The two pair of thoracic legs are very rudi- 

 mentary, the first pair in particular, being little more than papillae. 



Total length 0-8 mm., length of céphalothorax 0-53, width 0-35. 



Colour: Uniformly yellowish. 



{deltoideus, from the shape of the body of the female). 



Two females of this species, each with male attached, were ob- 

 tained from the gill cavity of Hexagrammns decagrammiis , taken at 

 Hardy bay, September 1st, 1915. 



