SCHIZOPODA, STOMATOPODA, AND NON-ANTARCTIC ISOPODA. 197 



Genus Cymodoce, Leach. 



Cymodoce uncinata, Stebbing. 

 C. uncinata, Stebbing, 1902. 



Scotia. 



Station 482, Saldanha Bay, Cape Colony, May 1904. Two males, 6 mm. 

 and 12 mm.; four females, 7-8 mm. 



The females of this form do not seem to have been hitherto observed. They have 

 two submedian, blunt and rounded bosses on the telsonic segment, which correspond to 

 the large bosses found on the male, but are very much less developed. The bosses 

 are not so well developed in the largest female as in the smaller male, in which they 

 have reached almost adult proportions. The apex of the telsonic segment of the 

 female is trifid, with the median lobe well developed and bluntly rounded, and the 

 lateral lobes marked off by mere notches. The apex of the telson in the young male 

 is of the same form. It seems to me that the form of the apex of the telson character- 

 istic of the adult male is reached by the greater development of the lateral lobes of 

 the female, and consequently of the notches which separate them from the median lobe. 



The most characteristic feature of the present species is the scythe-like termination 

 of the outer uropod, and the sharply truncate extremity of the inner uropod, which 

 are the same for both sexes. STEBBING mentions both of these points, but hardly 

 emphasises them. 



Sphaeromidds oj uncertain identity. 



Two specimens of eubranchiate Splueromidse, representing two distinct species, are 

 present in the collection. Both are female and, as such, cannot be referred to their 

 correct genera, though they appear to be very closely allied to Dynamenclla. I have 

 not attempted to refer them to their proper species. They may briefly be noted 

 as follows : 



(1) Station 118, 51 41' S., 57 51' \V., Port Stanley, Falkland Isles. One 

 female, 4 mm. (Plate, figs. 7 and 8.) 



The most characteristic feature of this specimen is the form of the telson, which 

 I have represented on Plate, figs. 7 and 8. Looked at from above, it takes the 

 form of a triangle narrowing rapidly to an abrupt apex ; but from the ventral surface 

 the lateral margins are seen to be folded in to a certain extent, though they do not 

 meet in the mid-ventral line to form a definite tube as in Cymodocella, nor is the half 

 tube thus formed as long as in the. latter genus. Looked at from the posterior end, 

 therefore, the end of the telson appears as a semicircular nutcli ; hut this cannot be 

 considered as a notch in the apex of the telson, since il is formed by the infolding of 



(ROY. soc. EDIN. TRANS., VOL. xux., 887.) 



