The Scottish Naturalist. 187 



EHODA nov. gen. 



Externa antenna fnodice crassa, parte mobili extra cnrvata. 

 Extettii pedipalpi pediformes. Pedes omnes monodactyli ; eorum 

 par primum ceteris paulo crassius, et par qnartu?n longitudine 

 vix cequans ; at horum utrumque est aliquanto longius paribus se- 

 cundo, tertio, et quinto. Oculi orbiculares, pedunculis sublon^is 

 tenuibus imposiii. Testa cylindrica, a pxrte anteriore in brevi 

 obtuso rostro desinens ; in testa prope utrumque foramen ocular e, 

 et in utroque latere recta firimi pedum par is regione si?igula spina 

 locata sunt. Abdomen cylindricum, prater ultimum segmentum, 

 quod admodum compressum longius et altius est segment panultimo. 

 Telson lanceolatum, in valida, acuta spina desinens. 



External antennae of moderate thickness, movable portion curved outwards. 

 External pedipalps pediform. Feet wholly mo.iodactyle, first pair rather 

 thicker than the others, and somewhat shorter than the fourth pair, both being 

 considerably longer than the second, third, and fifth. Eyes circular, set on 

 rather long slender foot-stalks. Carapace cylindrical, terminating anteriorly in 

 a short obtuse, rostrum, with a spine near each orbit, and one on each side in 

 a line with first pair of feet. Abdomen cylindrical, excepting the last segment, 

 which is very much compressed, and longer and deeper than the one preceding 

 it. Telson lanceolate, terminating in a strong, sharp spine. 



Rhoda JARDINEA.NA H. Sp. 

 (Plate IV. fig. X.J 



Carapace.— Smooth, with a small tooth on each side in front 

 of the insertion of the first pair of fee'. Two spines directed 

 upwards and forwards, one above each orbit. Rostrum.— A single 

 compressed spine, directed slightly upwards. Eyes. — Rounded, 

 slightly larger than the peduncles, which are cylindrical and 

 about a-fourth the length of the antennil scale. External an- 

 tennoz. — With the first segment half the length of antennal scale, 

 depressed. Second and third segments extending together a 

 little beyond the end of antennal scale, movable portion 

 slender, bent abruptly outwards, and half of the length of the 

 body, from the rostrum to the extremity of the central plate of 

 tail. Antennal scale. — Lanceolate, terminating in a minute spine, 

 ciliated on the inner margin. Internal antenna. — Inserted out- 

 side and below the external, nearly two-thirds of the length 

 of the first segment of external antennae ; cylindrical, termi- 



