REPORT ON THE CRUSTACEA MACRURA. 805 



Second pair of gnathopoda terminating in a long spatuliform joint. 



First two pairs of pereiopoda chelate, the propodos being rather less than half 

 the length of the carpos, which corresponds in length with the meros and ischium 

 combined. Two succeeding pairs of pereiopoda missing. Posterior pair long, and 

 terminating in a short, broad, and lanceolate dactylos, which articulates with the 

 propodos in the centre of a cup-shaped hollow fringed with long hairs ; the propodos is 

 short and cylindrical, but four times as long as the dactylos ; the carpos is long and 

 cylindrical, being about twelve times as long as the propodos and a little longer than the 

 meros, which is not armed with a prominent tooth at the carpal extremity, but is sparsely 

 fringed with spine-bike teeth on the posterior margin, and is connected with the ischium by 

 an overlapping articulation. All the pereiopoda, excepting the last pair, carry a basec- 

 pbysis, and also a rudimentary mastigobranchial plate. 



Telson subequal with the outer plate of the rhipidura, dorsally fiat, smooth, and fringed 

 with a few hairs at the extremity, and short spinules on the latero-dorsal angle. 



Habitat.— Station 152, February 11, 1874; lat. 60° 52' S., long. 80° 20' E. ; 

 Antarctic Sea; depth, 1260 fathoms; bottom, Diatom ooze. Three specimens ; one 

 male, two females. Associated with Pentacheles. Trawled. 



This species was originally named from a belief that the posterior three pairs of legs 

 terminated in a dactylos that was short and lanceolate in form, but the specimens are 

 damaged, and although in my original notes I have recorded the three pairs as being so 

 shaped, my drawing represents only two. I think that there is a possible error in the 

 description, inasmuch as I had not at the time observed that the posterior pair in many 

 and probably all species is rudimentary, so as to make it a distinction of generic value. 

 The dactylos in this pair is short, broad, and lost among a mass of stiff hairs that fringe 

 the distal margin of the propodos ; it is lanceolate in form, but whether the preceding two 

 are so or not I cannot determine. 



The females were laden with ova of an oval form, and much larger than those of other 

 species in which eggs have been observed. The pereiopoda that are preserved attached 

 are not quite so long proportionately as in some other species, a circumstance that is due 

 to the carpos being not quite so long in relation to the meros to which it is attached. 



