236 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPEEIID^. 



Hyperia thoracicn. 



The seconcl pair of antennce are loiiger than the iirst; the flagellura consists of iiine 

 SLibequal, very short joints. 



The perwopoda are like those in the adiilt male, 011I3' a little thicker. 



The female. 



Pl. XI, fig. 40. 



The forepart of the body is much wider, and more tumid than in the adult male; 

 the head and peraäon together are considerably longer than the pleon and uriis together. 



The Jirst pair of antennce reach scarcely beyond the under margin of the head. 

 The single flagellar joint is provided with about a dozen long olfactory hairs on the 

 inner side. 



The second pair of antennas reach only a little farther down than the first pair; 

 the first free joint of the peduncle is longer than the second, the third is not fully as 

 long as the two preceding together; the glandular cone is about half as long as the first 

 joint. The single flagellar joint is soraewhat longer than the whole peduncle, and is 

 fringed with short hairs along the under margin. 



The perceopoda are like those in the male. 



The pleon is shorter than the perajon. The segments are dorsally armed with 

 spine-like projections as in the male. 



The urus is somewhat broader than in the male, and the first segment is scarcely 

 more than a third longer than the last coalesced. 



21. HYPERIÅ GILESI, n. sp. 



The name is given in houour of Dr. G. M. GiLES. 



Diagn. Caput permagnum, parte coalita persei longius. Segmenta quinque prima j9«'ce« coalita, cetera 

 libera. Carpus pedum percni primi paris dilatatus, productus, processum formans dimidium 

 marginis posterioris metacarpi longitudine superantem. Carpus pedum secundi paris valde 

 productus; margo anterior processus carpalis dimidio marginis posterioris metacarpi multo 

 longior. Metacarpus pedum primi et secundi parium spinis destitutus; margo posterior 

 indistincte serratus. Pedes tertii ac quarti parium pedibus parium duorum prEecedentium 

 paullo longiores; carpus metacarpusque non serrati; dactylus longus. Pedes parium trium 

 ultimorum duobas prfecedentibus paullo longiores; femur latum; carpus tibiam longitudine 

 sequans; tibia, carpus, metacarpusque non serrati. Segmenta plei non producta; latera 

 segmentorum post rotiindata. Peduncukis pedum uri ultimi paris plus quam duplo longior 

 quam latior. Telson rotundatum, latius quam longius, segmento ultimo uri brevius, pe- 

 dunculo pedum uri ultimi paris latius, et dimidio pedunculi ejusdem brevius. 



The head is very large, and is longer than the coalesced part of the perseon. The first five 

 perceo7ial segments are coalesced, the last two are free. The carpus of the first pair of 

 perceojyoda is dilated, and produced, forming a process vyhich is more than half as long as 



