I. '08. 169 



almost ready to emerge. From an examination of these it 

 appears that the young are liberated in a very advanced state 

 of development, as might be expected in the case of a species 

 bearing such large eggs. In these larvae all the pereiopods and 

 pleopods are present, although the nropods are not yet free ; 

 the telson is deeply bifurcate much as in Spence Bate's figure 

 of the protozoea of Spongicola venusta (1888, PI. xxix, fig. 2). 



General disirihution. — The type and the only previously re- 

 corded specimen of this species was dredged by the Travailleur 

 in 1880 in the Bay of Biscay. A closely allied, but apparently 

 distinct, form, Richardina Fredericii, has been found by the 

 Puritmi expedition in the Mediterranean (Lo Bianco, 1903). 



Irish distrihution. — Three specimens of Richardina spini- 

 cincta have been found off the Irish coast : — 



Helga. 



S.R. 331— 9/5 /'06.— 51° 12' N., 11° 56' W., 610-680 fathoms. 



Trawl — One ovigerous female, 21 -5 mm. 

 S.R. 364— 10/8 /'06.— 51° 24' N., 11° 47' W., 620-695 fathoms. 



Trawl. Temperature at 600 fathoms 7-92° C, salinity 



35-377^^- One, 16 mm. 

 S.R. 506— 12/9 /'07.— 50° 34' N., 11° 19' W., 661-672 fathoms. 



Trawl. Temperature at 600 fathoms 8-22° C, salinity 



35-53°/^^ — One ovigerous female, 20 mm. 



It seems probable that the genus Richardi72a, like other 

 genera of Stenopidae, is definitely associated with sponges. 

 R. spongicola wsls found in Indian w^aters in Hyalonema Ma- 

 soni. None of the examples of R. spinicincta were actually 

 found in sponges, but the Hexactinellid, Pheronema Grayi, 

 was taken in large numbers in the first haul, S.R. 331, and less 

 abundantly at S.R. 506. 



Vertical range. — 661-672 fathoms. 



