's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 147 



XVI. - DIAGNOSES OF NEW SPECIES OF MACRUROUS DECAPOD 

 CRUSTACEA FROM THE SIBOGA-EXPEDITION, 

 BY D r . J. G. DE MAN. 



Pasiphaea propinqua n. sp. 



Stat. 100. 6° 11' K, 120° 37'.5 E. Off the Sulu Islands. 450 m. (Chart). 

 Bottom dead coral. 1 male. 



Closely allied to Pasiphaea sivado (Risso). Carapace measuring one- 

 third the length of the abdomen. Front triangular, subacute, projecting 

 as much forward as the obtuse, outer orbital angles. Antennular 

 prominence rounded and separated from the branchiostegal spine by a 

 deeper sinus than from the outer orbital angle ; antero-lateral angle of 

 the carapace broadly rounded, branchiostegal sinus shallow and making 

 an obtuse angle with the lower margin of the carapace. Carapace rounded 

 dorsally, without ridges or carinae on the lateral sioles. Anterior dorsal 

 tooth mutilated. 



First and 5th abdominal terga rounded, the 2nd, 3rd and 4th slightly 

 carinate, the 6th segment, which is one and a half as long as the 5th 

 and about one and a half as long as broad, sharply carinate dor- 

 sally, the carina terminating in a small acute tooth, which is directed 

 downward. Telson one-fifth shorter than 6th segment, deeply grooved 

 dorsally; the tip triangular, prominent, half as long as broad at the 

 outer angles and armed probably on either side with 4 spines. 



Eyes blackish or slate-coloured, little enlarged, eyestalks hardly reaching 

 beyond the middle of basal antennular article. Antennular peduncle reaching 

 a little beyond the middle of the distance between the orbital margin of 

 the carapace and the apex of the scaphocerite ; 3rd segment a little longer 

 than 2nd. Scaphocerite a little more than half as long as the carapace, 

 4-times as long as broad, distinctly narrowing anteriorly. 



External maxillipeds extending almost to the distal end of the scapho- 

 cerite. Thoracic legs resembling those of Pas, sivado (Risso), fingers of 

 1st pair two-thirds or three-fourths the length of the palm, those of 2nd 

 pair '/o longer than the palm. 



Length from the front to the extremity of the telson 72 mm. 



Pasiphaea sivado (Risso), of which I was enabled to study 3 specimens 

 from Nizza, differs by the following. The carapace measures about half 

 the length of the abdomen without the telson, so e. g. in one of the 



