322 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIIDiE. 



Phrojiimopsia Sarsi. 



The first pair of rnaxillai (Pl. XIV, fig. 8) have the principal laraina shorter than 

 the stein, thickly covered with short hairs, and armed at the apex and on the inner side 

 with stout spines. The secondary lainina is much longer than the principal, with the 

 apex broadly rounded, serrated, and armed with a aingle short spine. 



The second pair of maxilUe (Pl. XIV, fig. 9 and 10). The principal lamina is ir- 

 regularly conical, sparingly set with short hairs, and armed with a single, two-pointed 

 spine at the apex; the secondary lamina is longer than the principal, curved, thickly 

 covered with hairs, and provided with two spines at the apex. 



The maxillipech ((Pl. XIV, fig. 11 — 13) are long and slender. The stem is long and 

 narrow; the lateral laininis are narrow, almost linear, deeply incised at the apex, where 

 each carries two short obtuse spines, which are tipped with foiir or five fine hairs (Pl. 

 XIV, fig. 13); the median lobe is stout and well developed, but shorter than in the genus 

 Euthemisto ; the apex and the f)'ont margin are fringed with short hairs. 



The peroion is not twice as long as the head, and quite as long as the first two 

 pleonal segments together; the first two segments are dorsally coalesced, the third is much 

 shorter, the following inci'ease slowly in length, the seventh being the longest. The epi- 

 merals are fused with the segments Avithout traces of a suture. The pera^on is not broader 

 than the pleon. 



The branchial .^acks are attached to the second, third, fourth, fifth, and sixth pairs 

 of pera3opoda. That of the sixth pair is the longest, but still not half as long as the 

 corresponding feraur. 



The first pair of pera'opoda (Pl. XIV, fig. 14 and 15). The femur is narrow, 

 with the bind margin feebly convex; it is much longer than the three following joints 

 together. The lower hind part of the tibia is produced, and armed with two spine-like 

 bristles. The carpus is not dilated, fully as long as the two preceding joints together, 

 and armed with a stout bristle at the middle of the hind margin. The metacarpus is 

 long, slender, tapering towards the apex, and as long as the two preceding joints together; 

 the lower half of the hind margin is feebly notched, and set with four or five short spines. 

 The dactylus is scarcely half as long as the metacarpus; is curved, and densely set with 

 hairs; at the base there is on the hind margin a large opening for the outlet of the 

 glandular secretion. Glands are developed in all the joints. 



The second i^air (Pl. XIV, fig. 16 and 17) do not fully reach to the apex of the carpus 

 in the third pair. The femur is narrow, almost linear, and is quite as long as the three 

 following joints together, the carpal process included. The genu is somewhat broader than 

 long, and is smooth. The tibia is very small, almost reduced, but is provided with a distinct 

 adductor-muscle and a retractor; the margins of the joint are smooth. The carpus may 

 also be considei^ed as reduced in form and size; the stem of the joint is somewhat shorter 

 than the tibia, but is provided with distinct muscles; the lower hind corner is produced 

 into a long narrow, rod-like process, which is more than three times as long as the rest 

 of the joint; it is subapically armed with a stout spine, the apex of the process being 

 sharp-pointed and projecting behind this spine for about half its length (Pl. XIV, fig. 17). 

 Such a terminal spine occurs in the carpal process of Euthemisto libellula, and in some 

 way supports the opinion that the fourth joint in the second pair of Phronimopsis may 



