I. '08. 142 



differs from Sars' original description of the genus in having 

 the inner branch simple. 



Only a single male example of this species, 23 mm. in 

 length, has as yet been found in the East Atlantic. In this 

 specimen the antennular fiagella do not differ markedly in 

 length or thickness from those of the female. Smith (1882) 

 states that in the male the fiagella are twice as long as the 

 peduncle, with the outer ramus longer and very much stouter 

 than the inner, or than the outer flagellum of the female. 



Size. — One of the specimens recorded from the West At- 

 lantic was as much as 72 mm. in length. Ovigerous females 

 from the British and Irish area measure only 30-33 mm. 



Colour in life. — The cara])ace is of a rather faint dull purple 

 grey colour ; this is darkest dor sally and anteriorly , becoming 

 paler laterally. Posteriorly the carapace shows a faint mot- 

 tling of red — on the abdominal somites are larger patches of 

 rather faint purple grey and red ; the pleura of the first and 

 fifth somites are unpigmented, those of the second, third and 

 fourth show at the posterior basal angles a large grey patch 

 surrounded with red. The pleura of the sixth somite are grey ; 

 the telson is unpigmented and transparent. 



The eyes are reddish, with grey stalks. The antennular 

 peduncle and antennal scale are purplish grey with reddish 

 mottling; the fiagella are transparent, with the exception of 

 the inner ramus of the antennule, which is basally of a reddish 

 colour. The ante-penultimate joint of the outer maxillipede 

 is purplish grey and the propodus of the first pair of pereio- 

 pods is mottled with the same colour. All the other joints of 

 the outer maxillipedes and pereiopods are transparent, with 

 the exception of the basus of the fourth pair of the latter, 

 which bears a red spot. The pleopods are unpigmented, but 

 there are faint reddish markings in the centre of each uropod. 



General distrihution. — Sclerocrangon Jacqueti was first 

 found in the East Atlantic by the TravaiUeur , and has since 

 then been dredged on several occasions off the East Coast of 

 the United States between Charleston and Cape Cod. 



Although hitherto unrecorded, this species was taken within 

 the British area by both Porcupine and Triton expeditions 

 ,near North Bona. The localities are : — 



Porcupine. 



August, 1869.-59° 34' N., 7° 18' W., 542 fathoms, bottom tempera- 

 ture 6-5° C— One, small (in Mus. Norm.). 



Triton. 



St. 10, 1882.-59° 40' N., 7° 21' W., 516 fathoms, bottom tem- 

 perature 7-8-8T° C. — Four ovigerous females, 30-33 mm. 

 (in Mus. Norm.). 



