CAPRELLIDAE 301 



Both sexes are alike in the number and arrangement of the dorsal tubercles or spines, 

 which are all single and medio-dorsal. 



Antenna 1, flagellum n-jointed in both sexes. Antenna 2, flagellum 2-jointed. It 

 might even be called 1 -jointed, because the junction between the two joints is almost 

 obsolete and difficult to trace. The mandibular palp has three spinules between the two 

 larger ones on the apex of the 3rd joint. 



Gnathopod 2 alike in the two sexes, the "poison tooth" small, acute, slightly beyond 

 the centre of the palm, followed by two small rounded denticles. Peraeopods 3-5 lost 

 in both specimens. 



In view of these specimens it becomes very unlikely that the specimens (Stebbing 

 says one ; Mayer says two) from Antigua are conspecific. The $ according to Mayer 

 (1903, p. 59) has the head spine and single medio-dorsal spines on segments 1-3, but 

 also paired rounded tubercles in the middle of segments 3 and 4. For this species I 

 therefore propose the name antiguae. 



Genus Caprellinoides, Stebb. 



Stebbing, 1888, p. 1237. 

 Mayer, 1890, p. 87; 1903, p. 57. 

 Schellenberg, 1926 a, p. 467. 

 Barnard, 1930, p. 440. 



The very oblique junction between segments 4 and 5, especially noticeable in the 3, 

 might be incorporated in the generic diagnosis. It is not well shown in Schellenberg's 

 figure of antarctica S, but probably exists as in the other species. 



Caprellinoides tristanensis, Stebb. 



Stebbing, 1888, p. 1238, pi. cxli. 

 Mayer, 1890, p. 87. 



Occurrence: St. MS 14. South Georgia. 1 $ 8 mm. 



Description of $. Head rounded. Eye composed of nine ocelli. A small medio- 

 dorsal conical tubercle near anterior margin on segment 2, and on middle and posterior 

 margin of segments 3 and 4. Peraeon segment 7 and pleon missing. 



Antenna 1, flagellum 11 -jointed. Antenna 2, flagellum 3 -jointed. 



Gnathopod 2 as in Stebbing's figure of the <J. Peraeopod 3 (on segment 5) 3-jointed 

 as in cJ. Peraeopods 4 and 5 lost. 



Branchiae on segments 3 and 4, rounded ovate. 



Colour reddish, the ocelli darker red. 



Remarks. The original type was a ? which was re-examined by Mayer. In assigning 



C. mayeri to the same genus as tristanensis, Mayer (1890, p. 88) states that some doubt 



still remains because the <J of the latter is unknown. It is therefore very disappointing 



to find that the present $ lacks the very parts which would resolve this doubt. 



# • 



Distribution. Tristan da Cunha, no fathoms. 



