664 DR. J. G. DB MAN ON A NEW SPECIES [May 25, 



Gottingen, who kindly enabled me to study the two specimens, 

 apparently belongs to the group " insignis " of Coutiere and is most 

 closely related to A. paracrinitus Miers, to A. 2)ciracri7iitus Miers, 

 var, bengcdensis Cout., and to A. lanceloti Gout., three species 

 inhabiting the Maldive and Laccadive Archipelagoes, though 

 the first of them was originally discovered at Goree Island, 

 Senegambia. 



The larger specimen is 16*5 mm. long, the other 15 mm. 

 Rostrum acute, reaching to the distal fourth of the visible part of 

 basal antennular article ; rostral carina obtuse, extending backward 

 to the base of the rounded, unarmed, orbital hoods, from which 

 it is separated by rather deep, though narrow grooves. On each 

 side of the rostrum, the frontal margin (PI. LXX. fig. 1) bears a 

 rounded prominence, nearly as in A. superciliaris, but glabrous and 

 with the outer margin more oblique. Antennal and antennular 

 peduncles with spines and appendages nearly as in A. parad'initus 

 hengalensis (Coutiere, Alpheidfe Maid, and Laccad. Archip. 1905, 

 pi. Ixxxii. fig. 37). Second antennular article once and a half 

 longer than wide distally, a little longer than the visible part 

 of the 1st and of the 3rcl, which are of equal length ; stylocerite 

 acuminate, reaching to the second fourth part of median article. 

 Carpocerite surpassing the antennule almost by the whole length 

 of 3i"d article ; the terminal spine of the scaphocerite, the outer 

 margin of which is slightly concave, is slightly curved inward 

 and reaches almost to midway between the extremities of both 

 peduncles ; the terminal spine exceeds by a little more than one 

 third of its length the tip of the scale, which is a little shorter than 

 the inner peduncle. Basicerite with a small spine on the lower 

 side, not visible from above. Telson (PI. LXX. fig. 2) nearly as in 

 A. paracrinitus var. hengalensis, but the outer angles of the slightly 

 prominent posterior margin obtuse. Tlie length of the telson 

 equals in both specimens 3*1 times the width of the posterior 

 margin ; the greatest width anteriorly is, in the larger specimen, 

 1'93 times, in the other just twice the width of posterior margin ; 

 in both specimens the spinules of the upper surface, which are 

 0'2 mm. long, are situated as in the var. hengalensis of A. para- 

 crinittos, the anterior pair anterior to the middle, the proportion 

 between the length of the telson and the distance of that pair from 

 the posterior margin being, in the larger ^specimen, 1'73, in the 

 other 1'85 ; the proportion between the distances of both pairs of 

 spinules from the posterior margin is, in the larger specimen, I'Q, 

 in the other 1'7. 



Meropodite of larger chelipede twice as long as wide ; upper 

 margin unarmed at its extremity, infero-internal margin with a 

 small acute tooth at the apex and with seven small mova,ble spi- 

 nules, 0'117 mm. long, inserted from the proximal extremity to the 

 distal third. Chela 8"4 mm. long, one third longer than the cara- 

 pace, 2'8 times longer than high, and somewhat compressed, its 

 thickness being in proportion to the height as 2*3 ; upper and lower 

 borders of the palm (PI. LXX. fig. 3) nearly parallel, lower border 



