26 



on the distal half of each joint. When the pleon of the 

 female is distended with a multitude of eggs, the outer rami 

 of these pleopods, especially those of the second and third 

 pair stand out from the segments clasping round the brood. 

 A little process close to each basal angle of the telson 

 appears to represent the uropods. 



Of the specimens sent me from the Cape one is a male, 

 obtained from a depth of 30 fathoms in False Bay. When it 

 arrived it was still tightly embedded in a mass of what I 

 suppose to be the compound ascidian, Goodsiria placenta^ 

 Herdman. This covering perhaps assisted to preserve the 

 colouring, which is a pinkish red, produced by a plentiful 

 sprinkling of dots of various sizes so coloured upon a lighter 

 ground ; the fingers of the chelipeds are red with lightish 

 tips ; the eyes are brown on red stalks. The female 

 specimen, of which the mouth-organs and pleon have just 

 been described, had lost all colour. 



The carapace of the male measured 29 mm. in length by 

 22.5 mm. in breadth. It is, therefore, much larger than the 

 males described by Stimpson and Henderson. The carapace 

 of the female was 2^ mm. long by 17.5 mm. broad. 



MACRURA. 

 Fam. : PaRAPAGURIDAE. 



1882. Parapaguridae^ S. I. Smith, Bull. Mus. Comp. Zool. 



Harvard, v. 10, No. i, p. 20. 

 1888. Parapaguridaey Henderson, Challenger Anomura, 



Reports, v. 27, p. 85. 

 1892. Parapaguridae, Ortmann, Zoologische Jahrbiicher, 



v. 6, p. 269. 



By S. I. Smith this family is distinguished fi-om the 

 Paguridae only by the circumstance that the gills are 

 trichobranchiate instead of phyllobranchiate. Henderson, 

 who adds as a characteristic the fact that the species appear 

 to occur only in deep water, explains that " the gills are 

 modified trichobranchiae, each consisting of a central stem 

 which gives rise to two collateral rows of rounded filaments, 

 gradually decreasing in size towards the apex, whereas in 

 the Paguridae the stem gives rise to two rows of flattened 

 leaflets." 



In Parapagurus dimorphus the mid-rib of the gill gives rise 

 to two rows of flattened leaflets, which at about the middle 

 divide into two unequal rounded filaments, thus producing 

 what Milne-Edwards and Bouvier speak of as quadriserial 



