398 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [54] 



other species, which has very interestiug affinities to the species just 

 described. This specimeu is from Station 2042, July 30, north lat. 39° 

 33', west long. GS"^ 26' 45", 1,555 fathoms, globigerina ooze, temperature 



The carapax is broken and badly distorted, but is evidently very 

 nearly like that of Benthcecetes Bartletti, and the rostrum is similar in 

 form and is armed with two teeth in the same way. The eyes, anten- 

 uulffi, antennas, mandibles, and maxillae are essentially as in Benthcecetss 

 Bartletti. The ultimate segment of the endopod of the maxilliped 

 (Plate X, Fig. 3) is about a sixth as long as the penultimate segment 

 and intermediate in form and size between that of Benthcecetes Bartletti 

 and that of Bentliesicymus f carinatus^ and the distal extremity of the 

 exopod is suddenly narrowed into a slender flagellum, but otherwise 

 the maxilliped agrees with that of Benthcecetes Bartletti. 



The first gnathopod (Fig. 4) is intermediate in form between that of 

 Benthcecetes Bartletti and that of Benthesicymus f carinatus : the mesial 

 side of the merus is expanded into a thin lamella the whole length of 

 the segment, which is two-fifths as broad as long but not much broader 

 distally than proximally and projects only very slightly beyond the 

 articulation of the carpus : the terminal segments are nearly as in Ben- 

 thesicymus ? carinatus. The second gnathopods (Fig. 5) reach beyond 

 the middle of the antennal scales, and the relative ]iroportion of the 

 segments is about the same as in Benthcecetes Bartletti, but the form 

 of the dactylus is different, though it is carried in the same position. 

 This segment is a little longer and narrower than in Benthcecetes Bart- 

 letti, and obliquely truncated on the mesial side at the extremity, so 

 that the triangular tip, which is armed with a single long spine, is at 

 the outer edge ; the outer and the truncated distal edges are setigerous. 



There are minute rudimentary exopods at the bases of all the pe- 

 rgeopodsi, of which the first three pairs are otherwise very much as in 

 Benthcecetes Bartletti, except that they are much longer and more slen- 

 der, the second pair reaching beyond the middle of the antennal scales 

 and the third pair far beyond the tips. 



The number and arrangement of the branchiae and epipods is ajipar- 

 eutly the same as in Benthcecetes Bartletti. 



The specimen gives the following, merely approximate, measurements 

 in millimeters : 



Length of carapax 21 



Length of second gnathopod 22 



Length of first perseopod 19 



Length of second perseopod 28 



Length of third perseopod 42 



