REPORT ON THE ANOMURA. 39 



have the carapace slightly broader in proportion to its length than the Cape Verde 

 examples. 



A great disproportion in size exists between the two sexes ; the males also have the 

 terminal abdominal segment narrower. The largest female specimen has a length of, 

 carapace of 22 mm., while the largest male similarly measures only 13 mm. 



Genus Mastigochirus, Miers. 



MasKgopus, Stimpson-, Proc. Acad. Nat. Soi. Philad., p. 68, 1858, nom. ^wsmcc. 

 Mastigochirus, Miers, Journ. Linn. Soc. Lond. (Zool.), vol xiv. p. 321, 1877. 



Carapace ovate, the fronto-orbital border dentate. Ocular peduncles long and 

 slender. Antennules and antennae similar to those of Remipes but shorter. External 

 maxillipedes more slender than those of Remipes. First pair- of legs remarkably long and 

 slender, exceeding the total length of the body, the terminal segment multiarticulate. 

 Other characters as in Remipes. 



This genus is separated from Remipes chiefly by the form of the first pair of legs. 

 The multiarticulate nature of the terminal segment is altogether exceptional amongst 

 Anomura, and recalls a somewhat similar arrangement in many Macrura. 



Mastigochirus quadrilobatus, Miers. 



Mastigochirus quadrilohatus, Miers, Joiirn. Linn. Soc. Lond. (Zool.), vol xiv. p. 322, pi v. 



fig. 8, 1877 ; Crust, in Zool H.M.S. " Alert," p. 280, 1884. 



Habitat. — Station 186, off Booby Island, Flinders Passage; depth, 8 fathoms; 

 bottom, coral mud. Two males were dredged in this locality. 



The type specimen came from the Philippines, and more recently the species has been 

 taken by the " Alert " in Prince of Wales Channel, at a depth of 5 to 7 fathoms. 



Family II. A L B u N e i D ^. 



Alhunidee, Stimpson, Proc. Acad. Nat. Sci. Philad., p. 68, 1858. 

 Alhuneidx, Miers, Journ. Linn. Soc. Lond. (Zool), vol. xiv. p. 326, 1877. 



First pair of legs chelate, flattened. Terminal segment of abdomen ovate. External 

 maxillipedes subpediform, the merus not greatly dilated ; exognath of small size. 

 Antennar peduncle usually with a distinct acicle arising from the second 

 joint. 



