REPORT ON THE ANOMURA. 33 



Cosmonottcs grayii, Adams and White. 



Cosmonotus Grayii, Adams and White, Proc. Zool. Soc. Lond., p. 227, with two woodcuts, 1847; 

 Crust., Voyage of H.M.S. " Samarang," p. 60, pi. xiii. fig. 3, 1848. 

 „ „ Stimpson, Proc. Acad. Nat. Sci. Philad., p. 79, 1858. 



Habitat. — Amboina, 15 fathoms ; a male specimen. 



The type specimen came from Borneo, while those recorded by Stimpson were 

 dredged off Formosa at a depth of 90 fathoms, on a sandy bottom. 



Genus Lyreidus, De Haan. 



Lyreidus, De Haan, Crust. Japon., p. 1.38, 1850. 



„ Dana, U.S. Explor. Exped., vol. xiii.. Crust., part i. p. 404, 1852. 

 „ Haswell, Catal. Austral. Crust., p. 144, 1882. 



Carapace oblongo-ovate, smooth, convex from side to side, and from before backwards. 

 Fronto-orbital border narrow, less than half the width of the carapace; the rostrum 

 broadly triangular. Ocular peduncles short, the cornese oblique, well developed ; orbits 

 iU-defined. Antennules and antennae of small size, subequal ; the second joint of the 

 antennar peduncle with an inconspicuous external prolongation ; basal joint of the 

 antennular peduncle incompletely concealed. External maxUlipedes linear, the merus 

 considerably longer than the ischium ; the three terminal joints minute, less than half 

 the length of the merus. Sternal shield similar to that of Notojnis, but not narrowing 

 to such an extent between the second pair of legs. Chelipedes as in Notopoides. 

 Ambulatory limbs with narrow elongate dactyli, of which those of the second pair are 

 placed at right angles to the propodus ; the last pair of legs slender, almost filiform. 



Lyreidus tridentatus, De Haan. 



Lyreidus tridentatus, De Haan, Crust. Japon., p. 140, tab. xxxv. fig. 6, and tab. .J. (mouth organs), 

 1850. 

 HasweU, Catal. Austral. Crust., p. 144, 1882. 



Habitat. — Off Port Jackson, 30 to 35 fathoms; 3rd June 1874. About a dozen 

 examples (of both sexes), taken in this locality, exhibit two prominent dorsal elevations 

 on the third and fourth abdominal segments, that of the third blunt and tuberculate, the 

 fourth acute. This spine is described but not figured by De Haan. The abdominal 

 segments are slightly wider in the female than in the male, and the abdominal append- 

 ages long and hirsute. 



Station 174, off Kandavu, Fiji Islands; 210 fathoms, Globigerina ooze. The single 

 male specimen possesses a mesial swelling on the third abdominal segment, and on the 

 fourth a very prominent and acute spine directed upwards and forwards. 



(zool. CHALL. EXP. — PART LXIX. — 1887.) Zzz 5 



