HALIPORUS PROPINQUUS. 141 



terminate each in a larger anterior and a smaller posterior 

 lobule; anterior lobule with obtuse tip that carries a small 

 incision and that, like the sinuous posterior margin, is 

 fringed with short, spiniform setae; posterior lobule trian- 

 gular with subacute tip, beset, like its posterior margin, 

 with still smaller spinules. 



In the female there is a transverse plate with rounded 

 upper margin between the legs of the 4'*! pair, whereas 

 this margin is sharp and cutting in Halip. aequalis ; in- 

 stead of the low and flattened, shield-like plate that in 

 Halip. aequalis exists between the legs of the 5*^ pair, one 

 observes a transverse, much thicker and higher tubercle, 

 the postero-lateral angles of which are conical and obtuse. 



Length of male 81™™, of female 91™™-. 



15. Sicyonia fallax^ n. sp. 



Station 105. Lat. 6°8'N.; long. 12 1°19' E. Depth 

 275 M. 



Closely resembling Sic. longicauda Rathb. from the Ha- 

 waiian islands, but perhaps different. 



Rostrum- shorter, less slender, broader at base, still more 

 ascending, hardly reaching to the far end of the 1»' joint 

 of anteunular peduncle; upper margin with 4 teeth, the 

 posterior just behind the frontal border, a small tooth 

 below the tip that appears therefore tridentate. Of the 

 two teeth on the dorsal crest of the carapace, that reaches 

 to its posterior border, the posterior is larger than the 

 anterior and more prominent than in Sic. longicauda. 

 Sixth abdominal somite hardly once and a half as long 

 as the 51*1 and somewhat more than once and a half as 

 long as high. Telson longer than ö^'i somite. 



Length of female 45™™-. 



16. Sicyonia rectirostris, n. sp. 



Station 193. Sanana-bay, east coast of Sula Besi. 

 Depth 22 M. 



Closely resembling Sic. parvula de Haan, but different 



Notes from the Leyden Miuseum, ^'■ol. X.XIX. 



