OF THE TEMPEEATE ATLANTIC AND AECTIC OCEANS. 209 



Var. PERPLEXA (fig. 6). Among normal specimens of JS'. riibrum from 

 St. Andrews given me by Prof. Mcintosh, I have found other examples 

 which show great divergence with respect to the tarsus and propodos, yet 

 agree closely among themselves. The tarsus is remarkably short, not 

 exceeding one third the length of the propodos. The propodos (fig. 6) is 

 considerably curved, and has the four basal spines placed as usual but of 

 small size, while the distal separated spine is entirely absent. The association 

 of the very short tarsus with the disappearance of the usual characteristic 

 distal spine of the propodos is very curious ; but I do not find other 

 characters to justify a specific separation of the form. 



Plymouth, Starcross, Devon ; Cullercoats, Northumberland ; Isle of 

 Cumbrae; St. Andrews, var. perplexa ; Oban {A. M. iV.). Cork (G. H. 

 Carpenter^. Mus. No7'. 



Firth of Forth {IT Arcy Tliompsoii) ; Dublin Bay and Dalkey Sound, also 

 ofE Rockahill, Irish Sea, and Ballynakill Harbour, Gal way (^Carpenter'). 

 Holland (Hoeh). Rare south of Norway {Sars). 



2. Nymphon brevirostee, Hodge. (PI. 29. figs. 9-12.) 



Nymphon brevirostre, Hodge, (22) p. 282, pi. xv. figa. 6-11, and Ann. & Mag. Nat. 



Hist. ser. 3, vol. xi. 1863, p. 464. 

 NympJwn gracile, Sars, (51) p. 55, pi. v. figs. 1 a-h (exclusive of all synonyms). 



This is the smallest Nymphon known to me ; length of body scarcely 

 3 mm. ; span of fully outstretched legs 17 mm. The form is very robust 

 for its size both as regards the body and legs, and these are unusually short. 

 The lateral processes of the trunk are equal in length to the breadth of the 

 trunk itself, the intervals between the processes are moderately broad. The 

 cephalic segment (fig. 8) is subequal in length to the united hinder segments, 

 the neck is very short ; the frontal portion is much widened at the extremity 

 to receive the chelifori. The caudal segment, when directed backwards, 

 reaches to a little more than half the length of the lateral body-lobes. The 

 oculiferous tubercle is conical and, viewed from the front, has two small 

 points near the summit (just as in Sars, pi. v. fig. 1 c). The proboscis is 

 often no longer than its breadth as viewed from above, but in other 

 specimens half as long again, its extremity widely rounded. The chelifori 

 (fig. 10) are robust, the scape three times as long as broad, and the hand of 

 nearly equal length ; hand generally carried bent inwards (fig. 9), so that 

 the proboscis reaches beyond it ; the finger and thumb are strong and 

 margined with short teeth, the thumb at about half its length is usually 

 suddenly contracted , in breadth so as to form a notch, over which hangs a 

 bundle of short setse. The palpi have the second joint slightly longer than 

 the third, which latter is equal in length to combined length of the two 

 terminal joints, the last of which is longer than the somewhat clavate-shaped 



17=P 



