134 METAPENEUS QU INQUEDENTATUS. 



beyond the outer ones, 2*^ of a sunken plate between the 

 legs of the 4^^ pair, on which one observes no teeth as 

 occur in Metap. mogiensis Rathb., perlarum Nob. and other 

 species, 3*^ between the sunken plate and the posterior 

 lamina there is at either side a transverse lobe, directed 

 obliquely outward. 



Length of male 45""ii.^ of female 40™™-. 



8. Parapeneopsis venusta^ u. sp. 



Station off Pulu Jedan, east coast of Aru-islands. 

 Shallow water. 



Rostrum very short, reaching to the end of l^t joint of 

 anteunular peduncle, with 7 or 8 teeth in addition to the 

 epigastric tooth; the 7 or 8 teeth are contiguous, reach 

 to the tip and the first is situated on the carapace. 



No postrostral carina. Longitudinal fissure short, reaching 

 to the level of the epigastric tooth. Antero-inferior angle 

 of carapace rectangular, obtuse, not spiniform or dentiform ; 

 the subhepatic ridge stops far short of that angle. Four 

 anterior abdominal terga rounded, 5th and 6th carinate; 

 telson as long as the 6th sonaite, much shorter than the 

 caudal swimmerets, lateral margins each with 4 small 

 spinules. 



Antennular flagella a little shorter than the peduncle. 

 External raaxillipedes stout, reaching to the anterior fourth 

 or fifth of the antennal scales. Legs of l^t pair with slen- 

 der spine at base, following legs unarmed ; the Srd legs 

 reach as far as the 5th, viz. to the middle of the terminal 

 joint of the outer foot-jaws. An epipodite is present on 

 the second maxillipeds only ; exopodite of last pair of legs 

 smaller than those of the other legs. 



Thelycum consisting of an anterior, semicircular and 

 slightly concave plate, that carries anteriorly a sharp tooth 

 in the middle-line, and of a broader posterior plate, which 

 is deeply notched in the middle, so that the thelycum 

 presents a deep concavity in the centre. 



Length of female 39m™-. 



JSTotes from the Leyden IMuseum, Vol. XXIX. 



