92 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



SYNALPHEUS PAULSONI LIMINARIS, new subspecies. 



Differs from S. pmtho^ri Xobili in the superior spine of the basi- 

 cerite being ahiiost wanting, in having tlie carpocerite a little more 

 elongate, at least 3.5 times as long as wide (2.9 to 3.1 in S. paulsoni), 

 and in having the palm of the large chela always terminated by a 

 strong anterior spine. 



Djibouti, French Somaliland; Ch. Gravier. Persian Gulf; Bon- 

 nier and Perez. 



Type in Paris Museum, 



SYNALPHEUS PAULSONI SENEGAMBIENSIS, new subspecies. 



Differs from all the other forms of S. paulsoni by the more slender 

 carpocerite (ratio 1:3.7), which approaches that of S. huhdensis, but 

 the superior spine of the basicerite is more slender than in that species, 

 the posterior angles of the'telson right angles and the meropodite of 

 the small cheliped is unarmed on its superior border (the large che- 

 liped is lacking). « 



Cape Yerde ; Ta?ls/nan. 



Type in Paris Museum. 



SYNALPHEUS MUSHAENSIS. new species. 



Differs from very similar forms of the Paulsoni group, by the car- 

 pocerite (proportion 1 : 8.6) surpassing the antennule by the whole 

 length of the distal article of the latter; by the scaphocerite, the scale 

 of which is wide and shorter than the antennule, while its lateral spine 

 exceeds it very slightly ; by the stylocerite not reaching beyond the 

 inferior spine of the basicerite. The large claw has short fingers 

 (proportions: fingers 1, total length 4.2, height 1.0), the palm bears a 

 feeble flattened prominence on its anterior margin, the supero-external 

 margin of the meropodite is spinous. The small claw has the follow- 

 ing proportions: fingers 1, total length 3.12, height 1. The posterior 

 angles of the telson are right angles except for a very slight spinous 

 prominence (| of the outer spine). 



Musha Islands, Gulf of Aden; Ch. Gravier. 



Type in Paris Museum. 



SYNALPHEUS MACCULLOCHI, new species. 



Closely allied to S. paulsoni Ji-nrrarheensis, but differs especially in 

 the large size of the eggs, which produce mysis larvie, as in S. tiimnlo- 

 manus Paulson. The rostrum is narrower and longer, the spine of 

 the basicerite much slenderer. The carpocerite has the same propor- 

 tions. The palm of the large chela is unarmed. The meropodite of 

 the third pair is 4.5 times as long as wide, instead of 4 times. 



