574 " THETIS " SCIENTIFIC RESULTS, 



TRYPHOSA CAMELUS, sp. nov. 



(Plate xlvii. a.) 



(Station 67.) 



On the fourth pleon segment this little species has a deep 

 dorsal depression leaving the after part as a conspicuous hump, 

 which has suggested the specific name. In many other respects 

 it resembles T. sarsi, i3onnier, figured by Sars in the 

 '"Crustacea of Norway,"*^ under the subsequently discarded name 

 Tryphosa nana, Kroyer. But the postero-lateral angles of the 

 third pleon segment are more sharply out-drawn. In the second 

 antennse the antepenultimate joint of the peduncle is not shorter 

 but, contrary to custom, longer than the penultimate joint. The 

 mouth organs offer no distinctive characters. The first gnatho- 

 2)ods, with tlieir distally narrowed side-plates, are also undis- 

 tinguishable Irom those of the allied form. The second 

 gnathopods, however, differ, not having the hinder angle of the 

 hand obtusely quadrate but subacutely produced, though not 

 sufliciently to form a chela with the finger, which is small and 

 weak, not as in the description by Sars, " rather strong." The 

 size of the second joint in the last three peraeopods as compared 

 with the remainder of the limb is greater than in the northern 

 species. In the fifth peraeopods its length considerably exceeds 

 that of the remaining joints combined. Also the fouith joint in 

 these three pairs is more expanded than in the other species. 

 The uropods are not very different from those of T. sarsi ; the 

 lobes of the deeply divided telson end more acutely and show 

 three spinules instead of two on each lateral margin. 



Length of female scarcely more than 3 mm. 



Locality. — Off' Wata Mooli, 54-59 fathoms. 



Family STEGOCEPHALID^. 



Stegocephalidoi, Sars, Forh. Selsk. Christiania, No. 18, 1882, p. 23. 

 Stegocephalidoi^ Stebbing, Das Tierreich, xxi., 1905, p. 88. 

 Stegocephalidoi, Ohevreux, Exp. Antarct. Fran§ais8, Amphip., 

 1906, p. 22. 



Genus A N D A N I O T E S , Stebbing. 



Andaniotes, Stebbing, Trans. Linn. Soc, (2), vii., 1897, p. 30. 

 Andaniotes, Stebbing, Das Tierreich, xxi., 1906, p. 96. 

 Andaniotes, Ohevreux, Exp. Antarct. Frangaise, Amphip., 1906, 

 p. 22. 



6 Sars— Crust. Norway, i., 2, 1890, p. 27. 



