433 



the first article (Dana, fig. 3(7). The strong spine on the basicerite usually reaches to the middle 

 of second antennular article, but sometimes, like in an adult male fi'om Stat. 7S, almost to the 

 end ; in other specimens, as in an ova-bearing female from Muaras-reef, it hardly extends to the 

 middle of the second article or even, as in the egg-bearing female from Stat. 19, hardly beyond 

 the first article. The terminal spine of the scaphocerite, the outer margin of which is very 

 concave, extends backward to the middle of second antennular article or even a little farther. 

 The small chela is different in the male and in the female. In the adult male, long 13 mm., 

 from Stat. 93, the small chela, little shorter than the carapace, is 4,16 mm. long, the fingers 

 that do not quite shut together, are very slightly longer than the palm which is one- 

 third longer (2 mm.) than high (1,5 mm.). The inner face of the fingers and of the palm 

 except its proximal half is very hairy. In the egg-bearing female from Stat. 125 that has the 

 same size, the small chela is only 2,7 mm. long, little more than half the length of the carapace, 

 rostrum included ; the fingers are very slightly shorter than the palm and the latter appears 

 comparatively less high than in the male, the proportion between the length and the height 

 of the palm being in the male as 4:3, in the female as 5:3. The specimen figured by Dana 

 was therefore certainly a female, for the figure ^d agrees with the small chela of the female. 



Remark. After Coutiere who was able to study the type sjoecimen oi A. lineifer 

 Miers from Samoa at the British Museum, this species is identical with A. parvirostris. 



General distribution: Red Sea (Heller) ; Dj ibouti (Coutiere) -, Maldive and 

 Laccadive Archipelagoes (Coutiere); Great Redang Island (Lanchester) ; Bay of Batavia (de 

 Man) ; Balabac Strait (Dana) ; Funafuti (Borradaile) ; Samoa (Miers) ; New Caledonia (Coutiere) ; 

 Japan, Kagoshima (Ortmann). 



67. Alpheus Hippotho'c de Man. 



Alpheus Hippotlio'e ]. G. de Man, in: Journal Linnean Soc. London, XXII, 1S88, p. 268, 



PI. XVII, fig. 1—5. 

 Alpheus Hippotho'c J. G. de Man, in: Archiv f. Naturges. 53. Jahrg. 188S, p. 518 (partim.). 

 Alpheus Hippotho'c J. R. Henderson, in: Trans. Linn. Soc. Zool. Ser. 2, Vol. V, 1893, p. 436. 



Stat. 104. July 2/3. Sulu-harbour, Sulu-island. 14 m. Sand, i male and i egg-bearing female. 



The male is 20 mm. long, the female 17,5 mm., this species attains, however, the length 

 of 28 mm. In the male the rostrum reaches almost to the end of first antennular article, in the 

 female it is slightly shorter; the rostral carina, which in a lateral view appears slightly concave 

 between the eyes, hardly extends beyond the base of the orbital hoods. In both specimens the 

 basicerite carries a small spinule on its anterior lower margin, somewhat larger in the female 

 than in the male. Second joint of antennular peduncle a little longer than the visible part of 

 the first, third joint almost half as long as the second; spiniform extremity of the stylocerite 

 reaching to the end of first article. Terminal spine of scaphocerite extending backward to the 

 proximal third or fourth part of the second antennular article. 



The telson rather much narrows backward, its feebly prominent posterior margin is just 

 half as broad as the width at base and the telson is 3,25-times as long as its posterior margin 



