480 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



77. Genus MUNNA Kr^yer. 



Body sub-pyrif orm, vaulted, with the last three segments of the 

 thorax very small. Terminal segment of body narrow, sub-pj-riform. 



First pair of antennae short. Second antennas very much elongated, 

 with the last two articles of the peduncle long and slender. 



First pair of legs subcheliform, comparatively small in female, but 

 well developed in male. Last six pairs of legs ambulatory and rapidly 

 increasing in length. Dactylus bi-unguiculate. 

 - Uropoda small, simple. 



ANALYTICAL KEY TO THE SPECIES OF THE GENUS MUNNA. 



a. /Surface of body smooth. Eyes present. 



b. Caudal segment with lateral edges evenly convex, ana each armed with a single 

 slender denticle; apical lamellae distinctly serrated. Eyes large. First pair of 

 antennae with flagellum composed of four joints, including very small apical 

 joint. Flagellum of second antennae longer than peduncle. Last pair of 

 legs scarcely longer than body. Legs slender. Uropoda obliquely truncate 



at tip Munna faljricii Kr0yer 



b'. Caudal segment with lateral edges rather bulging in front, and each armed with 

 four strong denticles; without any serrulated lamellae. Eyes small. First pair 

 of antenme with flagellum composed of three joints, including very small apical 

 joint. Flagellum of second antennae not attaining length of peduncle. Last 

 pair of legs scarcely longer than anterior division of body. Legs shorter and 

 stouter than usual. Uropoda produced at tip into several dentiform projec- 

 tions, one of which is hook-like Munna kreyeri Goodsir 



a' '. Surface of body covered with numerous spines. Eyes absent. 



Munna caeca, new species 



MUNNA FABRICII KrjzSyer. 



Munna fabridi KRISYER, Naturh. Tidsskr.. (2), II, 1846-1849, p. 380; Voy. en 

 Scand., Crust., 1849, pi. xxxi, figs. la-q. REINHARDT, Naturhistorisk Bidrag 

 til en Beskrivelse af Gronland, 1857, p. 35. M. SARS, Chr. Vid. Selsk. Forh., 

 1858, p. 154, 1859. LUTKEN, Crust. Greenland, 1875, p. 150. HARGER, Proc. 

 U. S. Nat. Mus., II, 1879, p. 159; Report U. S. Commissioner of Fish and 

 Fisheries, 1880, Pt. 6, pp. 325-328, pi. in, fig. 14. HANSEN, Videnskabelige 

 Meddelelser fra den naturhistoriske Foreniug i Kj0benhavn, 1887-88, pp. 

 193-194. G. O. SARS, Crust. Norway, II, 1899, pp. 108-109, pi. XLV, fig. 2. 

 STEBBING, Ann. Mag. Nat. Hist. (7), V, 1900, p. 14. RICHARDSON, American 

 Naturalist, XXXIV, 1900, p. 300; Proc. U. S. Nat. Mus., XXIII, 1901, p. 

 556. 



Localities. South Bay, Eastport; Casco Bay; Western Bank; 

 Browns Bank; southern Greenland; Godhaven, Egedesminde, Uper- 

 nivik, latitude 66 30' north, longitude, 54 50' west; also coast of 

 Finmark; coast of Norway. 



Depth. 4 to 200 fathoms. Sars says it occurs, in moderate depths, 

 among Hydroida. 



" Body rather short and compact, with the anterior division rounded 



See Sars for characters of genus, Crust, of Norway, II, 1899, p. 106. 



