186 Dr. E. L. Trouessart — Synoptical Revision 



of the other legs, which are all slender with cylindrical joints. 

 Total length 0*40 -045 millim. 



Hab. French coasts: Le Croisic [Chevreux), upon Laswa 

 rubra ; Roches de Castouillet, by dredging with swabs ; Medi- 

 terranean ( Trouessart) , upon Corsican moss ( Gigartina helmin- 

 thocorton) . English coast : Scilly Islands (in a preparation 

 communicated by Mr. Brady, mixed up with Halacarus 

 ctenopus). 



17. Halacarus oculatus. 

 Hodge (2) ; Lohmann (8), p. 82, figs. 67, 68. 



Char. Like the two preceding, but rather more elongated ; 

 second joint of anterior limbs inflated. Claws furnished loith 

 a lateral tooth and a ciliated comb. Cuirass with a sculpture 

 forming projections and lines as in the preceding species. 

 Total length 0-38-0-42 millim. 



Hob. French coast : Arcachon {Trouessart), upon oysters. 

 English coast: North Sea, Seaham [Hodge). Baltic, Kiel 

 [Lohmann) ; region of fled Algaj and of floating seaweeds. 



18. Halacarus gibbus, sp. n. 



Char. Legs very nodose, having the second and fourth 

 joints inflated on the four pairs, but especially on the anterior 

 pairs ; claws not pectinate, but furnished with a small slender 

 tooth. Epistomial plate presenting in the middle a strong 

 oblique pyramidal crest, the point of which is confounded with 

 the anterior point of the plate, thus forming a sort of boss or 

 hood ichich projects in an acute angle above the rostrum. 

 Cuirass presenting projections and lines with distinct punc- 

 tuation, as in the preceding species. Total length O^O-O^ 

 millim. 



Hob. French coast: Le Croisic [Chevreux), Roches de 

 Castouillet, by dredging with swabs. 



Subgenus Leptopsalis, Trt., 1888. 

 Genus Leptopsalis, Trouessart (7), p. 754. 



Char. Rostrum elongated, with the palpi slender, parallel, 

 the last joint terminated by a double point ; hypostome forming 

 a narrow spatuliform groove, attaining the base of the last 

 joint of the palpi. Otherwise the characters of the genus 

 Halacarus proper. 



Two or three species. The type is Leptopsalis Chevreuxi, 

 Trt. 



