— 26 — 



are considerably concave, constituting a kind of orbits ; the 

 latéral edges of the part produced are even bent a little upwards, 

 so that the dorsal surface is a little excavated along the margins. 

 The mesial keel is about as in T. œqualis, but the excavation 

 surrounding its anterior part is deep in front. Seen from the 

 side, the front end of the carapace is eut ofif, with the front 

 margin itself sloping even upwards and a little backwards, but 

 just on the front end of the upper surface a small vertical cone 

 is observed : the whole front part is therefore, when seen from 

 the side, shaped exactly as in T. insignis, H. J. H. (op. cit., 

 flg. 18). The carapace without latéral denticles and without 

 vestige of any gastro-hepatic groove. Eyes a little larger than 

 in T. acutifrons, completely black; the eye-stalks without any 

 tubercle near the cornea. The lobe from first antennular lobe is 

 very interesting; seen from above — and not taking the distal 

 elevated setose part of the joint into account — it is a transverse 

 plate, which is considerably broader than long but yet somewhat 

 more narrow than the second joint; the front margin of the 

 plate is a little convex and very deeply serrate, with 9-12 slen- 

 der, spiniform saw-teeth; the inner margin of the lobe proceeds 

 downwards and somewhat backwards on the inner side of the 

 antennula and bears the row of strong oblique coupling setae. 

 The lobe from second joint is, seen from above, rather large, 

 subquadrangular, without any spine or process. Maxillulae about 

 as in T. lateralis, H. J. H. (op. cit., flg. i5). Abdomen without 

 dorsal spines. — Length of the spécimen examined 37.5 mm ; 

 Ortmann's spécimen measured 44 mm . 



Locality. — Stat. 65o (1896) : lat. 36° 54' N., long. 23°-23° 

 12' W., 44oo m ; 1 spécimen. 



Remarks. — By the armature and shape of the antennular 

 lobe described this species is easily distinguished from ail other 

 forms of Thfsanopoda hitherto known. Judging from the arma- 

 ture of that lobe my détermination is certainly correct, though 

 Ortmann's brief description of the shape and adornment ofthe 

 anterior part of the carapace agrées badly with the features 

 described above and not at ail with his drawing. As to some 

 other points I refer to « Remarks » on T. acutifrons. 



