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proximal extremity of the upper margin to the apex of the infero-external border. Carpus short, 

 conical, cyathiform, with a transverse groove on the upper side near the anterior margin. 

 Chela turned outward, 2,7 mm. long, 2,3-times as long as the merus ; the palm, which is a 

 little longer than the fingers, the proportion being as 1 : 0,8, is nearly cylindrical ; its rounded 

 upper (inner) surface is 2,2-times as long as wide and there are nowhere grooves or ridges. 

 Fingers straight, shutting close together, the immovable finger a little broader than the dactylus, 

 the rounded, outer (upper) border of which is slightly arcuate ; the cutting-edge of the immobile 

 finger bears 9 or 10 very small, acute teeth, 3 or 4 of which in the middle are a little larger 

 than the rest, and one observes also a few teeth on the other finsrer. 



Merus of small cheliped 3,1-times as long as wide in the middle, appearing here slightly 

 wider than at the truncate, distal margin ; for the rest it resembles the merus of the other leg 

 and there is also a movable spine at the apex of the upper margin of the preceding joint. 

 The length of the chela is in proportion to that of the larger as 1 : 1,9, the latter being almost 

 twice as long ; the small chela, however, is only 1 ,4-times as long as the merus. The palm of 

 the small chela is as long as the fingers and its upper surface is 1,75-times as long as wide-, 

 fingers as in the other leg. 



Second legs as in Alph. aeqtialis. Ischium 5-times as long as wide, merus one-fourth 

 longer and 6, 2 5-times as long as wide. Carpus one-third longer than the merus, the five 

 segments are 0,45 mm., o,iS mm., 0,2 mm., 0,2 mm. and 0,3 mm. long. The first segment, 

 3,75-times as long as thick at its distal extremity, is one and a half as long as the fifth ; the 

 third is as long as the fourth, two-thirds of the fifth and the second article appears only a little 

 shorter than the third. Chela twice as long as the fifth segment, the fingers a little shorter 

 than the palm. 



Following legs as in Alph. frispinostis. The ischium of the third legs which is just as 

 long as that of the second legs and also 5-times as long as wide in the middle, bears a 

 movable spine in the middle and another, slightly longer, near the base. Both the merus and 

 the propodus are about twice as long as the carpus, the propodus being only 1,06-times as 

 long as the merus; the merus is 6-times, the propodus 10-times as long as broad and the 

 latter bears 4 short spinules besides a longer spine, twice as long, at the distal extremity. 

 The dactylus, that measures two-fifths of the propodus, is a little curved, simple and slender, 

 being 7-times as long as broad at its base. 



The propodus of the fifth pair is just as long as that of the third, 1 i-times as long as 

 broad, and bears 5 or 6 spinules besides the longer one at the distal extremity, but seems to 

 be devoid of the transverse rows of setae ; the dactylus measures one-third of the propodus. 



Length 10 mm. 



f 2 Alpheopsis Clialciope de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1910, p. 306. 



Stat. 154. August 14. o°7'.2 N., i30°25'.5E. Off the North coast of Waigeu Island. 83 m., 

 decreased till 59 m. during the haul. Grey muddy sand, shells and Lithothamnion. 



2 females with eggs. 



47 



