NEW TYPE OF MALACOSTBACOUS CRUSTACEAN. 7 



one remarkably long stout feathered spine surrounded by four much smaller feathered 

 ones, otherwise the lobe is unclothed. 



The outwardly turned lacinia (exopodite) which this segment possesses in Anaspides, 

 in common with the Euphausiacea and, to a less extent, the Mysidacea, is incon- 

 spicuous — if, indeed, it exists even in a rudimentary form. The corresponding part of 

 the segment in the present species appears to curve a very little outwards, but there are 

 no setae fringing it. 



Compared with Anaspides this appendage is more specialized, showing a certain 

 resemblance to that of the Amphipoda. The outer lobe is quite similar to that of 

 Anaspides except for possessing a more definite palp ; the inner lobe, however, is 

 not simply foliaceous, but more modified and there is no definite exopodite. 



The second maxilla (PL 2. figs. 13 & 13 a) is a little smaller than the first maxilla and 

 is formed of four foliaceous lobes : the innermost is very short and the others gradually 

 increase successively in length ; the first or innermost is quite narrow, the extremity 

 occupied by one short and two longer straight feathered spinules ; the second broader, 

 and apically bearing five feathered and plain slightly curved spinules and setae ; the 

 third broader still, and bearing about ten spinules and setae of a similar kind. The 

 fourth lobe is divided by a faint line of articulation, and may be considered the palp ; 

 it is rather broader than any of the other lobes, and carries ten or more long spinules, 

 and a little below the summit on the outer side there is another single feathered one. 



This appendage agrees essentially with that of Anaspides, but in that genus the 

 lobes are shorter and broader. In fig. 13 the lobes are flattened somewhat out of 

 normal shape to make the drawing clear. 



The maxillipeds (figs. 3, 1, & 11) agree in their general form with the succeeding 

 limbs, but are distinctly stouter, and have no multiarticulate exopod, but instead a 

 small simple one of branchial function. They are set close together at their origin, and 

 extend directly forwards, covering the buccal area,, and reaching far past the head to 

 the limit of the peduncle of the upper antennae. They serve principally as legs and for 

 grasping purposes, and also to a very slight extent as foot-jaws. The three attached 

 lobes fulfil a respiratory function. 



The first joint (coxa) is short and very broad, and attached to the ventral surface of 

 the cephalon ; both it and the succeeding two joints are flattened on the inner face so as 

 to embrace closely the buccal area ; the outer face is strongly convex, and close to the 

 frontal edge there arise, close together (not wide apart as Caiman has shown in 

 Anaspides), a pair of small, simple, narrowly ovoidal lamellse of branchial function, 

 which are transversely segmented near their proximal end, and between these and the 

 ventral surface of the cephalon, also on the outer side, there is a minute tubercle covered 

 with fine setre. The inner side is expanded, the edge quite straight and closely opposed 

 by its fellow of the other side ; the distal margin is prolonged into a short triangular 

 extension beyond the union of the second joint, with its apex tipped with a few short 

 setce (fig. 4). Had this arisen from the second joint one might have felt justified in con- 

 sidering it a rudimentary masticatory plate, which becomes such a pronounced feature 



