108 Mr. W. M. Tatteraall on new 



milar peduncle and twice as long as the antennal ; about 

 three and a half times as long as broad ; outer margin entire 

 and terminating in a strong spine, beyond which the apex of 

 the sc;ile is not produced ; spine on the outer distal margin 

 of the basal joint quite short. 



Month-parts not exhibiting any striking points of difference 

 from those of Ainblijops abbreviata, except that the second 

 joint of the niaudil)u]ar palp is considi'rably broader. 



F/;-.s/ tlioracic limb with the endopod almost exactly as in 

 Amblyu/js abbrw'iata. 



Second thoracic limb with tlie endopod of the same form as 

 ill A. abbreviata, but comparatively much longer ; twice as 

 long as that of the first tlioracic limb and longer than its 

 own exopi)d. 



Remaining thoracic limbs rather long and slender, with 

 the tarsus longer than the merus and composed of three 

 joints, the third joint longer than the second ; dactylus well 

 developed. 



Exopods of all thoracic limbs having the basal joint 

 lamclliform with a small spine at the outer distal corner; 

 flagcUiform part composed of nine to ten joints. 



Incubatory lamella of the female, two pairs, 



Pleopods in the male agreeing essentially with those of the 

 males of the genus Aniblyops. 



Telson not quite so long as the last segment of the pleon 

 and twice as long as broad at its base, where the margins are 

 slightly expanded; entire and lanciform in shape, tapering 

 distally to a narrowly rounrlcd apex; the distal two thirds of 

 its margins armed with from twenty-eight to thirty-two 

 spines increasing in length towards the apex; terminal spine 

 about one sixteenth of the length of the telson ; median 

 setae absent from the apex. 



Uropods slender : inner, about one and a half times as long 

 as the tcl-^on, with six spines on its internal margin in the 

 region of the otocyst ; outer, about twice the length of the 

 telson. 



Length of the largest female IG mm., of the largest male 

 15 mm. Female with about twenty young in the mar- 

 su])ium. 



Locality. Fourteen females and thirteen males from 

 S.K. 352, 92 miles S.W. bv W, of Bull Rock, Co. Kerry, 

 lat, 50° 22' N,, long, 11° 40' W., 800 fath., August 1906, 

 Petersen trawl at 750-800 fath. 



The external appearance of this species with its large well- 

 developed eyes and long acute rostrum at first suggests a 

 species of Boreomysis^ such as B. arctica, but the details of 



