112 Mr. W. ;M. Tattersall on new 



equal to about one-eii;lith of tlic total Icugtli of the scale; 

 no spine ou the hasal joint. 



Mouth-part.'i and fir at and second thoracic Ihnbs not differing 

 in any important point from those of tlie last species. 



Ri'mainin(/ thoracic limbs with the tarsus equal to tlie nierus, 

 three-jointed, the first joint the longest ; nail well developed, 

 but shorter than the last joint of the tarsus. 



Exopods of all the thoracic limbs with the outer distal 

 corner of the basal joint slightly acuminate ; flagelliform 

 part of ten joints. 



Incubatory lamellce of the female, two pairs. 



Telson diverging somewhat from the type met with in 

 D. dacfi/lops and D. bidir/itata, and shaped almost exactly as 

 in the genus Meterythrops ; equal in length to the last seg- 

 ment of the pleon and twice as long as broad at its base 

 where the margins are somewhat inflated ; margins rapidly 

 converging to a very narrow truncate apex armed with two 

 spines set close together and equal in length to one twelfth 

 of the length of the telson ; median setai absent from the 

 apex ; distal half of the lateral margins armed with about 

 nineteen short spines. 



Vropods slender : inner, about one and a half times as 

 long as the telson, without spines on its inner ventral margin ; 

 outer, nearly twice as long as the telson. 



Length of a mature female 15 mm. 



Locality. Four females from S.R. 3:)2, 92 miles S.W. bv 

 AV. of Hull Rock, Co. Kerry, lat. 50° 22' N., long. 11° 40' 

 W., 800 fath., August 1906, Petersen trawl at 750-800 fath. 



Tliis form div^erges somcfl'liat from the other two species 

 of the genus in the shape of tl.e telson, w lii(;h in its narrowlv 

 lanceolate form and want of apical setre approaches that of 

 members of the next genus. The eyes, however, conform to 

 the general type of Dactylerythrops, and to that genus the 

 species is provisionally referred. The eyes are rather remark- 

 able and enable the species to be readily distinguished ; 

 they are almost entirely covered by the carapace, only the 

 two digitate processes projecting beyond the latter. 



Genus Dactvlamblvops, Holt & Tattersall, 190G. 

 Syn. Dactylerythrops, Illig, 1906. 



This genus is undeniably very closely allied to the pre- 

 ceding one, but may be distinguished by the following 

 characters : — 



jEye small, with distinct and definite eye-stalks ; more or 

 less pyriform in shape ; visual elements, though imperfectly 



