34 



quadrate, ])alin transver.sely tnmcated and armed lielnw with 3 strong spines. 

 Tlie 3 posterior paii's of pereiopoda slender and elongate, basal joint broadly 

 ova], dactylus very slender. Last pair of iiro]ioila considerably projecting 

 beyond the ])receding one, basal part nnicli longer tliau the rami. Telson 

 rounded quadi-angular, truncated at tlie tip, a little longer than it is broad. 

 Body wliitisli, pellucid, with yellowish intestine and dark bluish ovaries, ocular 

 pigment brownish with orange-coloured coating. Jjcngtli of adult female 5 mm. 



Bemarkf. — The description and figures given l)y Boeck of this form 

 are rather incomplete and in some cases incorrect, jjrobably owing to his 

 specimen being in a very bad state of preservation. It is the only, as yet, 

 known species of the genus. 



Occurrence. — Boeck obtained only a single mutilated sj)ecinien of 

 this small Lysianasside at Haugesund on the west coast of Norway. I have 

 myself found it in several jilaces, botli <in tlie soutli and west coast, and 

 generally in rather deep water, especially where the bottom consists of 

 coarse sand and gravel. As the limbs are rather brittle, it is not easy to 

 obtain perfect sjjecimens by the aid of the usual di-edge. 



Disfrihufion. — British Islands. 



Gen. 3. Cheirimedon, Stebbing, 1888. 



Body liigli, compressed, with very large coxal plates. Antennge, of 

 nsual structure, subequal (in femaleX Epistome sliglitly projecting and defined 

 from the anterior lip l)y a short incision. Mandil)les with the cutting edge 

 terminating exteriorly with an acute dentiform corner, ])al]) originating at about 

 the same level as the molar exjiansion, less slender tliaii in Xnrmania, with 

 the last joint sliorter and furnished witli a series of curved set* on the inner 

 edge. First pair of maxillae with the ])alp less expanded and the basal lobe 

 somewhat larger. Lobes of 2nd pair of nuixillae sliorter and broader. Maxil- 

 H])eds ratlier large, masticatory lobes of moderate size, liasal ones normal, 

 jial]) well develoi)ed, with the terminal joint unguiforni. Anterior gna- 

 thopoda i)rehensile, terminating with a large com])lanated hand, succes- 

 sively expanded distally; posterior ones less slender than in Normania, 

 ])ro])odal joint oval and densely hirsute. Pereio]ioda not very slender, basal 

 joint of the 3 ])ostoriiir ]iairs vpr\- large, serrated ]Histeriorl\'. Branchial la- 

 mellae of usual structure. Vropoda suri'essively decreasing in size posteriorly, 

 last iiair with the basal nart rather shnrt and thick, rnmi verv uneiinal. the 



