106 KEY. T. E. E. STEBBING ON AMPHIPODA FEOM 



apex when closed passing on the inner side of the palmar spine into a pocket on the 

 surface of the sixth joint. Tlie branchial vesicles are very small. 



Feroiopods. These are of medium robustness and the usual relative proportions, but are 

 distinguished by the apical spines of the sixth joint. As in various other species, the 

 large distal spine which antagonizes with the finger is blunt-headed, with the margin 

 partially serrate, Init the smaller spine between this and the finger is bent up to meet 

 it, and is not tapering or parallel-sided, but from the neck onward of fusiform appearance, 

 with numerous lines or grooves parallel more or less to the outline ; the setule on the 

 inner margin of the finger is extremely small. In the last three pairs the second joint 

 has the hind margin crenulate, but not strongly. 



Fi7~st nropods. The rami are as long as the peduncle, and neither of them is devoid of 

 lateral spines. 



Second nropods. The rami are unequal, longer than the jjeduncle. 



Third nropods. The ramus is moderately slender, as long as the peduncle, both with 

 apical spines only. 



Telson. Cleft to the base, slightly broader than long, the lobes distally somewhat 

 acutely triangular. 



Length. One-fifth of an inch, 5 mm. 



Hob. Australia; Maroubra Bay, near Sydney, New South Wales. The specimens 

 occurred in a gathering sent me by Mr. Thomas Whitclegge, " obtained by washing the 

 seaweeds from low tide-line." 



By the structiu'e of the first gnathopods and the peculiar spines of the perseopods this 

 species seems to be easily distinguishable from all hitherto described. 



Htalella Warmingi, n. sp. (Plate 32 A.) 



The body is rather robust ; the sixth side-plates are deeply lobed behind ; the third 

 pleon-segment has the postero-lateral corners a little produced backward, acute. 



Eyes. Small, dark, wider apart than their diameter. 



First antenncc. The second joint is scarcely shorter than the first, the third a little 

 shorter than the second ; the flagellum has thirteen joints in the <j , ten in the ? . 



Second, antennee. More than half as long as the body, the gland-cone prominent, the 

 last joint of the peduncle a little longer tlian the penultimate ; the flagellum shows 

 nineteen joints in the S , fifteen in the ? . 



First maxiUce. The palp is minute. 



Ma.villij>eds. Third joint of palp distally widened, fourth with curved spine on the 

 blunt apex. 



First gnathopods. 6 . The fifth joint has a- subapical group of spines on the front 

 margin, and the bulging hind margin fringed with graduated spines; the sixth joint is 

 shorter, widening, with sinuous hind margin to the transverse palm, which is defined by 

 a process within Avhich the finger closes ; there is an oblique row of spinules on the 

 surface. 



Second gnathopods. $ . The second joint is slender, not lobed Ijelow ; the fifth short, 



