86 



The next three pairs of legs are sub-equal and also bear a 

 covering of small scales. The merus is unarmed except for 

 one or two distal spines. On the carpus there is sometimes a 

 distal spine on the dorsal side, but this is often absent in the 

 third and fourth pairs. There is a small tuft of setae at the distal 

 end of the propodite. The lower edge of the dactyl is furnished 

 with a row of sharp teeth which increase in size towards the 

 point, which has the form of a strongly -curved claw. These 

 teeth are accompanied by fringes of setae. 



In the male, the first pair of pleopods is practically identical 

 in form with those of M. tridentata, but their point of attachment 

 is not so near the median line. The second pair differs only in 

 detail from that of the last species. The other pairs are reduced 

 to the merest rudiments in the male. In the female, five pairs 

 are present and are long and slender. 



The uropods have no transverse suture on either exopodite 

 or endopodite, and are usually carried half concealed under the 

 t el son. 



All the female specimens taken by the Helga are ovigerous. 

 The eggs are large and few in number.^ In the different individuals 

 the eggs number 12, 20, 25, 30, 38 and 45. They measure 

 from 1-2 mm. to 1*4 mm. in diameter. 



Size. — The largest specimen taken is a male measuring 31 mm. 

 Hansen's largest one was 35 mm. long. 



General Distribution, — The species was first taken in the Gulf 

 of St. Lawrence (Whiteaves), and has since been recorded from 

 the east coast of the United States between 33° 35' N. and 

 40° N., and off Newfoundland. More recently it has been 

 taken in Davis Straits (Hansen, Stephensen), and to the south 

 and south-west of Iceland (Hansen). It has also been recorded, 

 under the name of M. longirostris, from the west coast of the 

 Sudan at 30° N. (Mihie-Edwards and Bouvier). 



Irish Distribution. — The Helga has taken this species on only 

 one occasion. 



S. R. 944.— 17 V '10. 86 mis. W.JN. of Great Skellig, Co. 

 Kerry, 51° 22' N., 12° 41' W., 982 fms., ooze. Shrimp- 

 Trawl. — -Ten, three males, and seven ovigerous 

 females, 31-25 mm. 



Vertical Distribution, — Usually found in depths of about 700- 

 900 fms., but has been taken in 180 fms. (Gulf of St. Lawrence), 

 and in 1,175 fms. (off Sudan). 



