The carapace is sub-cylindrical, not elevated posteriorly, the transverse width equal 

 to the vertical height and a little more than half the length. There is a median dorsal keel, 

 less marked posteriorly. Crossing the dorsal surface are three strong transverse ridges the 

 second of which is about the middle of the length of the carapace. The first runs nearly 

 vertically downwards on the side of the carapace and is crossed near its lower end by the 

 second, which curves torwards and reaches the margin of the carapace just below the antero- 

 lateral tooth. The crossing of the two ridges forms a prominent obtuse tooth. The third ridge 

 also curves forward laterally but dies out before reaching the second. The surface of the 

 carapace is sunken betvveen the ridges. A lower, rounded, longitudinal ridge runs between 

 the first and second transverse ridges at the level of the fronto-lateral suture. The ocular lobe 

 is long and narrow and extends quite to the tip of the pseudorostrum. No ocular elements 

 were visible. The pseudorostrum is short and truncated, slightly up-turned, defined below by a 

 narrow antennal notch and a prominent antero-lateral tooth which projects a little in front even 

 of the pseudorostrum itself 



Four thoracic somites are distinct behind the carapace. The first of these is produced 

 into a dorsal crest, rounded as seen froni the side. 



■ The abdomen is about 1V3 times the length of the cephalothoracic region and is rather 

 stout, the diameter being a little more than ^j^ of the height of the carapace. The somites are 

 sub-cylindrical, with the lateral articular processes slightly developed, and with two longitudinal 

 ridges on each side converging towards the posterior end of the somite. The last somite is 

 unusually large, being but little shorter than the preceding. 



The first pair of legs (PI. I, fig. 6) are rather more than one-third longer than the 

 carapace. The basis is longer than the remaining segments together and is not produced at 

 its distal end. The carpus is little more than half the length of the propodus which is subequal 

 to the dactylus. The remaining legs are of moderate length and rather slender. The ischium 

 of the second pair is distinct. 



The uropods are broken on both sides in the single specimen. The peduncle is slender 

 and longer than the last somite. 



Occurrence. Station 159, 411 metres. i specimen. 



R e m a r k s. This species is distinguished from all the other members of the genus by the 

 small size of the carapace and the elongation of the abdomen. As the inflated carapace is almost 

 the only definite character distinguishing the genus Cyclaspis from Bodotria^ the species might 

 perhaps equally well have been referred to the latter genus. The sculpturing of the carapace, 

 however, is unlike that of any species of Bodotria, where a lateral longitudinal keel is one of the 

 most constant features, and on that account I refer the species provisionally to the genus Cyclaspis. 



Bodotria. 



I. Bodotria sp. 



Two male specimens of this genus appear to belong to a species which is represented 



