150 Annals of the South African Museum. 



Bell-Marley). (S.A.M. Nos. A165, A166, A2872, A2924, A2957, and 

 A3851 respectively.) 



Geogr. Distribution : Arctic and North Atlantic Oceans ; Norway, 

 30-150 fathoms (Sars) ; Britain (Montagu) ; France (Chevreux) ; 

 Mediterranean (Costa, Delia Valle, Chevreux) ; Azores (Barrois) ; 

 Ceylon (WaJker) ; Seychelles, 29-150 fathoms (Walker) ; Wasin, 

 British East Africa, 10 fathoms (Walker) ; Red Sea, low-tide 

 (Walker); McMurdo Sound, Antarctic (Walker); South Georgia 

 (Pfeffer : L. antarctica) ; New South Wales (Haswell, Stebbing : L. 

 commensalis} ; Cape Agulhas, 150 fathoms (Stebbing : L. miersi) ; 

 South Orkneys (Chilton) ; Gulf of Mexico, H-30 fathoms (Pearse) ; 

 Bermuda (Kunkel). 



It is impossible to recognise Stimpson's L. ajfinis, but it is probably 

 referable to this species or to L. richiardh. In the latter case, and if 

 I am correct in my identification of the Cape specimens, richiardii 

 Lessona 1865 would become a synonym of affinis Stimpsou 1855. Far 

 preferable is it, in my opinion, to drop affinis altogether. 

 Possible other synonyms of this species are : 



L. grandimana Stimpsou 1853. Bay of Fundy. 



L. diemenensis Haswell 1880. Tasmania. 



L. gracilis Haswell 1880. Tasmania. 



L. brevidigitata Miers 1884. Torres Straits. 



LEUCOTHOK RICHIARDII Lessoua. 



1865. Leucothoe richiardii Mich. Lessona, Atti. Soc. Ital. vol. 8, p. 426. 

 1893. Delia Valle, I.e. p. 654, pi. 3, fig. 4, pi. 19, 



fig. 21. 



1906. Stebbiug, I.e. p. 167. 



1910. ,. Chevreux, Mem. Soc. Zool. Fr. vol. 23, p. 196. 



Body rather broad. Autero-lateral angles of head rounded. Eyes 

 large, subrotund. Side-plate 1 widened below, 2 a little longer than 

 deep, 3 deeper than long, 4 about as long as deep, autero-inferior 

 angle rounded, inferior margin strongly angular in $ . Postero- 

 inferior angles of 2nd and 3rd pleon segments acutely produced, with 

 sinus above in the 3rd. 



Telson a little rnoi-e than thrice as long as broad, apex minutely 

 trifid, the middle tooth the largest. 



First antenna reaching to 3rd peraeou segment, 1st and 2nd joints 

 subequal, 3rd very short, flagellum shorter than 2nd peduncular joint, 

 ca. 12-jointed. 



