80 



S. R. 504.— 12 IX '07. 50° 42' N., 11° 18' W., 627-728 fms.. 



coral. Trawl. — One. 

 S.R. 506.— 12 IX '07. 50° 34' N., 11° 19' W., 661- 



672 fms. Trawl. Temperature at 600 fms., 8-22° 



C, Salinity, 35-53 %^.— One. 

 S. R. 593.-6 VIII '08. 50° 31' N., 11° 31' W., 670-770 fms., 



ooze. Trawl. Temperature at 650 fms., 7-75° C, 



Salinity, 35-53 °/^^. — Two, very small. 

 S. R. 752.-16, 17 V '09. 51° 48' N., 12° 11' 30'' W., soundings 



523-595 fms., ooze. Midwater otter trawl, 0-595 



fms. Temperature at 500 fms., 8-9° C, Salinity 



35-43 %^.— Five, small. 

 S. R. 753.-17 V '09.-51° 24' N., 11° 59' 30" W., 561-572 fms., 



ooze. Trawl. Temperature at 550 fms., 8-79° C, 



Salinitv 35-46 °/^^. — One, 59 mm. 

 S. R. 805.-14 VIII '09. 60 mis. W.JN. of Tearaght Light, 



Co. Kerry, 51° 50' 30" N., 12° 14' W., 539-544 fms., 



ooze. Trawl. — One, 21 mm. 

 S. R. 1242.-14 VIII '11. 51° 27' N., 11° 55' W., 550-590 fms. 



Trawl. — Two, 44-51 mm. 



Genus Munidopsis, Whit eaves. 



Munidopsis, Whiteaves, 1874. Galaihodes, A. Milne-Edwards, 

 1880. Orophorhynchus , A. Milne-Edwards, 1880. Elasmonotus , 

 A. Milne-Edwards, 1880. Anoplonotus , S. J. Smith, 1883. 

 Galathopsis, Henderson, 1885. Munidopsis, Henderson, 1888. 

 Elasmonotus, Henderson, 1888. Munidopsis, A. Milne-Edwards 

 and Bouvier, 1894 {h). Galathodes, A. Milne-Edwards and 

 Bouvier, 1894 (b). Elasmonotus, A. Milne-Edwards and Bouvier, 

 1894 (b). Orophorhynchus, A. Milne-Edwards and Bouvier, 

 1894 (b). B athy anker istes , Alcock and Anderson, 1894. Muni- 

 dopsis, Faxon, 1895. Munidopsis, Alcock, 1901. 



Following Faxon and Alcock, I have united the various genera 

 into which this group has been split up, in the single genus 

 Munidopsis. The two species which have been taken in Irish 

 waters, M. tridentata and M. curvirostra, are widely different, 

 and might well be placed in separate genera were it not for the 

 fact that they are connected by transitional forms which make 

 it impossible to draw any hard and fast line between the various 

 groups. Alcock (1901) gives the genera proposed by Milne- 

 Edwards and Bouvier, and his own genus B athy anher istes, the 

 rank of sub-genera with a synopsis of their characters. 



The two Irish species are easily separable by the form of the 

 rostrum : — 



Rostrum spiniform ; strongly upturned, 



M. curvirostra. 



Rostrum broad, ending in three teeth, 

 the central one the longest, . . M. tridentata. 



