CAPRELLIDEA. 823 



referring this and the following species to iEgina, rests mainly on our 

 not knowing whether the mandibles are palpigerous or not; the 

 drawings and description drawn up in the East Indies by the author, 

 containing no information on this point, and the specimens being lost. 

 Moreover, the species have seven joints to the inferior antennae; the 

 last three joints (corresponding to a flagellum in other Amphipods), 

 are together much shorter than the preceding. 



The third basal joint of the superior antennae is nearly as long as 

 the second; the first is about half shorter; the flagellum of this pair 

 consists of slender oblong joints, and bears a few short setae at apex of 

 each. Hand of first pair of legs not half as long as in second pair; 

 claw about as long as hand. Hand of second pair with the dorsal 

 margin arcuate, the opposite straight and thin through basal half, and 

 nearly parallel to dorsal, then a deep rounded emargination, directed 

 towards base, and bounded outwardly by an acute point. Claw or 

 finger nearly as long as hand. The last two thoracic segments are 

 hardly longer than half the preceding. The branchiae are less than 

 one-third the length of the segments to which they are attached. 

 Head vertically oblong in profile view. Second thoracic segment as long 

 as head and first thoracic together ; third as long as first and second. 

 One of the spines of the second thoracic segment is at the middle of 

 the back, and the other near the articulation behind. The legs of the 

 second pair in the specimen examined, were attached quite near the 

 anterior extremity of the second segment, as in female Caprellae ; but 

 there were no ovarian lamellae under the third and fourth segments. 



iEGINA? ACULEATA. 



C. tenellae affinis, paululo crassior. Caput ad frontem vix acutum. 

 tegmenta thoracis secundum tertiumque aculeis duobus quoad dorsum 

 armata, reliquis inermibus. Manus secunda lath ettiptica, infra ar- 

 cuata, obsolete erosa et remote pubescens. Branchice parvulce, oblongce. 



Near tenella, slightly stouter. Head hardly acute in front. Second 

 and third thoracic segments armed with two curved spines on the 

 back, the others unarmed. Hand of second pair broad elliptical, 

 arcuate below, obsoletely erose and remotely pubescent. Branchiae 

 quite small, oblong. 



