2G0 THE CANADIAN NATURALIST. [Vol. 



Vll. 



,irenus.^ In its diameters, this genus (for which I venture to- 

 propose tiie nanie Mtniidopsia) approaches nearer to Munida than^ 

 to Galatlu'd. On some future occasion I hope to be able to give- 

 a detailed description, with figures, of this form; for the present 

 a short diagnosis only of some of its salient points will be at- 

 tempted. Of the limited genus Mnnuhi, only two or three- 

 specie.s are known at present. Munida nigosa (Fab.) is the same 

 as Mnnid'f Rondeleti'i of Bell, and Astacus Bxmffias of Pennant.- 

 Tlie other species are M. tennlmana of G. 0. Sars^ and M. Dar- 

 win li of Bell. 



The following additional species of Crust' cea were collected 

 from the deep-sea mud : f Hij^poJyte Fahririi Kroyer ; ■\Di((sh/Iis^. 

 sp. ; -fFsendomma roseum G. 0. Sars; -^Tliymnopoda neghctaf' 

 Kroyer, and another large species; Stegocepliahis anpidhi Phipps; 

 f Harp ina, sip.] -f Epimeria cornigera Fab.; \ Halirages fnho- 

 ctMc^MS Boeck ; -f Melphidippa, s\). ; Phoxii.s Kroi/eri St. ] Mun- 

 owpsis typica M. Sars; Anthura brachiata St.; and ^ NthaJia 

 bipes 0. Fab. 



* Munidopsis curviro.stra, nov. gen. et sp. External antenna? about 

 equal in length to the carapace and its rostrum ; internal ones very 

 short, not reaching farther than about one-fourth the length of the 

 beak. Eyes rudirnentanj, longitudinally oval, light yellowish in color ; 

 cornea devoid of facets. Carapace squarish, bat longer than broad, with 

 an outwardly directed straight spine on each of the front angles. 

 Upper surface of the carapace granulate, hispid, transversely irregu- 

 larly plicate. In the centre there are two dorsal spines, placed one 

 above the other, but at some distance apart. These, as are two similar 

 spines on the tail segments, are all exactly in a line with the rostrum, 

 and the whole four point forward. Rostrum simple (w ithout the spine 

 on each side of the base so characteristic of Munida)^ conspicuously 

 curved upward, stout at the base and gradually tapering to a fine point- 

 A single spine in the centre of the first and second tail segments, the 

 rest devoid of any. Anterior pair of legs about as long as, but not 

 longer than, from the ap(x of the rostrum to the end of the tail, extend- 

 ing a little beyond the tips of the outer antennas. The following are 

 the measurements of an average and apparently adult female : lengthy 

 from apex of rostrum to tip of tail, 138 inch; of carapace, including 

 ihe rostrum, -69 inch; of exterior antennae, -75 inch; of anterior legs^ 

 •94. Inhabits the centre of the mouth of the St. Lawrence River, be- 

 tween Anticosti and the south shore, in from 180 to 220 fathoms, and 

 probably burrows in the deep-sea mud. From Munida it may at once 

 be distinguished by its curved and simple rostrum. In the rudimen- 

 tary character of its eyes it closely resembles Calocaris, but not iri 

 many other respects. 



