2 7 S 



regarded as a variety — but the examination of a larger number of specimens is necessarv 

 to elucidate and decide this question. 



4. Pontopkilus incisus Kemp. PI. XXII, Fig. 66, 66<t. 



Pontophilus incisus Stanley Kemp, in: Records of the Indian Museum, Calcutta, Vol. XII, 

 Part. VIII, December 1916, p. 357, PI. VIII, fig. 1. 



Stat. 7. March 11. 7°55'.5S., U4°26'E. Reef of Batjulmati (Java). 2 ova-bearing females. 

 Stat. 51. April 19. Madura-bay and other localities in the southern part of Molo-strait. 



54 — 90 m. Bottom fine grey sand ; coarse sand vvith shells and stones. 1 male 



and 1 ova-bearing female. 

 Stat. 133. July 25/27. Anchorage off Lirung, Salibabu-island. 36 m. Bottom mud and hard 



sand. 1 ova-bearing female. 

 Stat. 240. Nov. 22 till Dec. 1. Banda. 9—36 m. Black sand. Coral. Lithothamnion-bank in 



18 — 36 m. 1 egg-laden female. 

 Stat. 313. Febr. 14/16, 1900. Anchorage East of Dangar Besar, Saleh-bay. Up to 36 m. 



Bottom sand, coral and mud. 1 female without eggs. 



The present specimens fully agree with Stanley Kemp's excellent detailed description 

 and figures. The largest specimen is the female from Banda, which is full-grown, 18 mm. long; 

 the male is 14 mm. long, the other females are shorter than 18 mm. The rostrum (Fig. 66, 66ö) 

 in this species is, as Mr. Kemp rightly describes, abruptly depressed at a right angle, the lateral 

 margins of the distal depressed part converge to the rounded tip, but those of the proximal part 

 of the rostrum are produced to a slender spin e with obtuse tip-, the two spines project in the 

 full-grown female almost horizontally forward, diverge slightly and are a little shorter than the 

 eyes, reaching to the distal fifth or sixth part of the cornea. The length of the rostral spines is, 

 however, variable, for in the female from Stat. 51, which is a little smaller than that from Banda, 

 the spines reach, beyond the eye, to the level of the anterior margin of 2 ud antennal 

 article and are here rather strongly turned upward. In the male the rostral spines are short, as 

 long as the eyes and a little turned upward, in the young female, long 15 mm., from Stat. 313, 

 they are also very short, reaching only to the middle of the cornea and in the ova-bearing 

 specimens from Stat. 7, which are only 13 mm. and 11 mm. long, just as far. The original 

 description reads that the distal border, in dorsal view, is strongly concave, but the lateral 

 angles of this concavity are not described as spines. 



The distinctly faceted corneal portion of the large eyes has a dark sea-green colour; it 

 is reniform in outline and in the dorsal emargination of the inner margin of the cornea the 

 eye bears a small subacute tubercle, which is not mentioned in the original description. 



In the ova-bearing female, almost 16 mm. long, from Stat. 133 the i st or anterior ridge 

 in the mid-dorsal line of the carapace ends in a conspicuous tooth as usual, but the 2 nd is not 

 developed, the 3 rd is uneven and the 4 th ends in a minute acute spine. The three anterior ridges 

 of the i st lateral carina terminate each in a minute spinule, but the remainder are inconspicuous. 

 The hepatic spine is well-developed, but the spine posterior to it is also harclly perceptible, 

 while the remaining ridges of the 2 nd lateral carina bear no small denticle. 



General distribution : Andaman Islands (Kemp). 



