134 DE. J. G. KE MAN ON THE PODOPHTHALMOrS 



inner surface of the mobile finger is equally marked with a 

 longitudinal, elevated, piliferous line. On the under margin of 

 the index a small tuft o£ longer hairs is situated close to the 



tip. 



The ambulatory legs are very characteristic and differ much 

 from those of B. sulcata. The legs of the first pair are a little 

 longer than the chelipedes, ttose of the second and third pair 

 are again a little longer than the ambulatory legs of the first 

 pair, and those of the last pair are about as long as those of 

 the first pair. The meropodites of all the legs are enlarged, 

 so that, e. g., those of the ambulatory legs of the second and 

 third pair are little more than twice as long as broad, whereas 

 in D. sulcata these joints are slender. The meropodites of all 

 the ambulatory legs are provided with rather large " tympana," 

 which occupy nearly the whole surface of the joints, those of 

 the last pair being only a little smaller*. The meropodites of 

 tlie legs of the first pair are armed at the distal end of the 

 upper margin witli two or three small acute teeth, those of the 

 legs of the second and third pair present a row of small acute 

 teeth along the distal half of the upper margin, which gradually 

 increase in size towards the distal end ; the meropodites of the 

 last pair only present one or two small teeth at the distal end of 

 tlie upper margin. The upper margins of the meropodites bear 

 a few small hairs, but the under margins of the meropodites 

 of the ambulatory legs of the first and second pair are densely 

 clothed with many long hairs. The carpopodites and propodites 

 of the ambulatory legs are very similar to those of D. sulcata 

 as regards their relative length ; these joints are slightly hairy, 

 but the carpopodites of the legs of the first and second pair pre- 

 sent a tuft of hairs on tlie upper surface close to the articulation 

 with the propodites, and the propodites of these legs a similar 

 tuft on the upper surface close to the articulation with the car- 

 popodites. 



The dactylopodites are very characteristic, for they are a 



* According to Dr. Hilgendorf (Crustacea von Ost-Afrika in Baron v. d. 

 Decken's Eeise, p. 86) the meropodites of the last pair of legs of I), sulcata 

 should present no " tympana ; " in the two specimens of that species, how- 

 ever, which I have before me the meropodites of the last pair of legs are 

 provided with very small ovoid " tympana," situated in the middle of the 

 joints. 



