283 



6. Pontophihis Kempii de Man. PI. XXIII, Fig. 68—68/. 



Pontophilus Kempii J. G. de Man, in: Zoologische Mededeelingcn, uitgegeven vanwege '.s Rijks 

 Museum van Natuurlijke Historic te Leiden. 191 8. Deel IV, Afl. 3, p. 165. 



Stat. 65a. May 6. Very near Stat. 65 (7°oS., 120° 34.5 E.). Between the islands of Saleyer 

 and Tanah Djampeah. 300 — 400 m. Bottom pale, grey mud, changing during 

 haul into coral bottom, i male and 2 females without eggs. 



This new form which I have the honour to dedicate to Mr. Sr.\XLEY Kemi' of the 

 Indian Museum, Calcutta, the author of valuable papers on the Indian Crangonidae, is closely 

 related to Pont, angtistirostris de Man, but distinguished by the different carination of 

 the carapace. 



The three specimens are, unfortunately, much mutilated, in the male both rostrum and 

 telson are incomplete and in the two females the abdomen is broken. The largest specimen is 

 the male; measured in the middle line, the carapace (Fig. 68) without the rostrum proves to be 

 4,2 mm. long, the abdomen without telson 9 mm., so that the entire length will be about 18,5 mm. 

 In one of the two females the carapace, measured in the middle line from the posterior to the 

 level of the orbital margin, appears to be 3,3 mm. long, the rostrum in the middle line without 

 the distal lobes 1,2 mm., the entire length of the carapace 4,5 mm.; the abdomen is about 

 10 mm. long, the entire length of this female 14,5 mm. The rostrum (Fig. 68/;) that reaches 

 in this female beyond the eyes to just beyond the distal extremity of basal antennular article, is 

 very narrow, the breadth on the proximal half being one-fifth the length in the mid-dorsal 

 line; the lateral margins of the proximal half run parallel to the middle, from here they nrst 

 slightly converge, but soon again diverge and the rostrum ends in two slightly divergent lobes. 

 In this female the left lobe is a little broader than the right and obliquely truncated, the 

 rio^ht, however, transversely: in the other female one observes just the contrary, the right 

 lobe being a little broader than the left, which is transversely truncated, the right obliquely. 

 Though both specimens are damaged, the two lobes must be regarded, at least provisionally, as 

 beinor indeed truncated. The rostrum is channelled dorsally and the two terminal lobes are obliquely 

 turned upward; the lateral margins of the rostrum and the orbital margins are fringed with 

 long feathered setae, by which the eyes are partly concealed. In the male the rostrum is broken 

 off in the middle and reaches just beyond the middle of the eyes. 



Carapace pubescent, being covered with short feathered setae, which (Fig. 68 «) in the 

 male are 0,12 mm. long. Orbital margin entire, orbital spine reaching to the middle of the eyes, 

 antennal spine acuminate, slightly divergent and reaching as far forward as the rostrum; the 

 antennal spine is buttressed by a long sharp carina, that extends backward to the level of the 

 anterior extremity of the mid-dorsal crest and immediately below and contiguous to the antennal 

 spine one observes the branchiostegal spine which is half as long. Like in the allied species a 

 shallow groove runs transversely across the base of the rostrum. There is in the mid-dorsal line 

 a sharp, strongly-compressed and prominent carina that runs from the posterior margin of the 

 carapace forward and terminates in a well-developed procurved spine, which is placed at about 

 one-fifth the length of the carapace (without the rostrum) from the orbital margin; this carina 

 is interrupted or indented by the cervical groove a little behind the middle of the carapace. In 



