BY MARGUERITE HENRY. 557 



the base. Antennules extending to the ba-se of the caudal ranii. Fifth pair of 

 legs very similar to those of the preceding species. Length, 2.0 mm. 



Male. Fifth pair of leg-s with the serrate lamella of the left leg smaller 

 than in B. triarticulata and curved at the tip; right leg with the endopodite 

 reaching the end of the second segment of the exopodite and having a well- 

 deflned, inwardly-directed projection near the base; the spine of the first seg- 

 ment of the exopodite is only half the length of that of the second segment; the 

 terminal spine greatly exceeds the length of the ramus. 



Distribution. — N.S.W. : This species has not hitherto been recorded from 

 this State; it was collected on several occasions at Moss Vale. Sars' specimens 

 came from Victoria. 



BOECKELLA FLUViALis, u.sp. (Plate Ivi., fig-s. 1-2 and 4-6.) 



Female. (PI. Ivi., fig. 1). Cephalothorax long and slender, oval in outline, 

 tapering slightly anteriorly; last segment with the lateral expansions (PI. Ivi., 

 fig. 2) large, the outer lobe acutely pointed and extending to the end of the 

 first segment of the abdomen, inner lobe small and rounded, with a short pointed 

 projection in the middle. Abdomen with a long genital segment which iS equal 

 to the two succeeding seg-ments combined; it is very slightly asymmetrical and 

 moderately protuberant ventrally; caudal rami not divergent, exceeding the length 

 of the preceding segment and bearing well-developed setae which are of almost 

 equal length. Antennules long, reaching, when reflexed, almost to the end of the 

 caudal setae. Antennae and oral parts of normal structure. Fifth pair of legs 

 moderately strong, the second segment of the exopodite provided with the visiial 

 curved and denticulated claw, last segment of this ramus bearing seven spines, 

 the inner apical one of which is exceptionally long, exceeding the length of the 

 segment itself. Length, 1.8 mm. 



Male. Similar in appearance to the female, but without the pointed lateral 

 expansions of the last segment of the cephalothorax. Right antennule (PI. Ivi., 

 fig. 6) moderately swollen and geniculated. Fifth pair of legs powerfully de- 

 veloped; the left leg (PL Ivi., fig. 4) has a large rectangular-shaped lamella on 

 the second basal segment; this lamella is irreg-ularly serrated, the fii-st and the 

 last prominences being the largest. The endopodite is composed of two distinct 

 segments; it is unarmed and has a rounded apex; the inner edge of the first 

 segment of the exopodite is slightly curved towards the endopodite and bears 

 numerous hairs. The second basal segment of the right leg (PL Ivi., fig. 5) is 

 produced inwardly to a pointed, somewhat triangular expansion; the endopodite 

 reaches the end of the second segment of the exopodite, tapering irregularly to a 

 point; the base is produced inwards to form a second triangular expansion which 

 is broader than that of the basal segment; the spine of the first segment of the 

 exopodite is equal in length to two-thirds of that of the second segment. Length, 

 1.7 mm. 



This species is most nearly allied to B. triarticulata (Thomson) and B. 

 oblonga Sars. It differs specifically from both these species, more especially in 

 the length of the antennules and the formation of the fifth pair of legs in the 

 male. 



Distribution.— 'N.S.W. : Holbrook. 



BOEClvELLA CORONARIA, n.sp. (Plate Iv., flgs. 1-7.) 



Female (PL Iv., fig. 1). Cephalothorax long and slender, tapering anteriorly 

 and posteriorly, the greatest width occurring about the middle; lateral expansions 

 of the last segment of moderate size, the outer lobe extending beyond the middle 



