66 NOTES ON TASMANIAN CRUSTACEA, ETC. 



Mr. Kendall Broadbent, but no precise locality is given. Mr. 

 C. Chilton writes me (June 13th, 1892) : " I have an abundance 

 of specimens from two situations on the Mount Kosciusko 

 plateau"; these were collected by Mr. R. Helms. I collected 

 several specimens among dry leaves, moss, etc., in the bush on 

 the slopes of Mt. Wellington, a short distance above " The 

 SpriDgs," at a height, therefore, of about 2500 feet ; and I 

 have since received numerous specimens, collected by Mr. 

 Morton from the same locality, as well as from other parts in 

 the neighbourhood of Hobart. 



By the kindness of Prof. Haswell, I have been enabled to 

 compare my specimens with types of the New South Wales 

 form, to note any differences, and to amplify the description 

 in the catalogue of the Australian Crustacea. 



Both pairs of antennce, as is the case in most or all Amphi- 

 poda, vary considerably in length and in the number of the 

 joints of the flagella, according to the age of the individuals. 

 This character, it seeuis to me, has generally been accorded too 

 much importance as a basis of classification in this group. The 

 Australian specimens, however, are more strongly setose than 

 the Tasmanian, and this- feature prevails throughout most of 

 the appendages. The upper lip is large, rounded and prominent. 

 The mandibles (fig. 1) are slightly different in the two forms, 

 my Tasmanian specimens having the molar ridge more pro- 

 minent and less cup-shaped than the others, while the ciliated 

 spines are fewer. The loiver lip (fig 2) is of a more or less 

 uniform type in all Orchestidse ; the outer edge has a finely 

 corrugated border, which is very marked in some of my speci- 

 mens. The maxillce are normally developed ; the first pair 

 (fig. 3a) have the outer plate ending in about ten stout spines 

 toothed on their inner edge, while the inner plate is slender 

 and ends in two short spines ; the seco7icl p)air (fig. 3b) have 

 both plates rounded at the end and fringed with fine spines. 

 The maxiUipeds (fig. 4) do not quite agree with Haswell's 

 description ; the inner plates are tipped with two rounded 

 teeth (between which stands a seta) with a small tooth on the 

 inner side ; the outer plates, which are more slender and extend 

 forward a little further, end in two short setae ; the three 

 succeeding articulations— forming the so-called palp — become 

 slender proximally and bear very few setae, while there is only 

 the [rudiment of a blunt terminal joint (dactylos ?). The 

 ^posterior gnathopoda (fig. 6) in the male show some points of 

 difference — best seen by reference to the figures. The dactylos 

 is rounded, and} the point of contact with the margin of the 

 propodos marked by a few minute hairs. The propodos tapers 

 to a rounded end, and its ujjper edge is thin and flange-like, 

 as are the projecting processes of the carpus and meroa. In 

 my Sydney specimens (fig. 5) the flanges on the lower side of 



