REPORT ON THE AMPHIPODA. 1265 



crasso, sub apicem curvato. Color rubescente vel viridescente-bnumeus. Long. corp. 

 ad 8^ mm.; mauus 2-da long ad 1,8 mm. 



" Femina. — Corpus segmentis 4 primariis permulto minus elongatis, 1-mo dorsaliter 

 breviore, 2-do nee duplo longiore quani lato, 3-io et 4-to paulo longioribus. Caput 

 segmento 1-mo duplo longius. Pedes 2-di paris 1-mo minores, manu simili, paulo 

 breviore, sed latiore, palma dente obtuso subbasali, duas spinas subtrorsum gerente, 

 armata, ungue curvato, lsevi, 1-mo debihore. Corpus rubrescente-brunneum, maculis 

 roseis, ranter viridescente-brunneum. Long, usque ad 8,2 mm. 



"Mas junior, Pedes 2-di paris 1-mo non majores, manu ad formam feminse tran- 

 seunte, ungue lsevi." 



In tbe Challenger specimen of the male the dorsal line of the head is as long as the 

 dorsal bne of the first segment, though considerably shorter than its ventral line ; the 

 third and fourth segments of the pergeon are decidedly shorter than the second ; the 

 lower antennas are fully equal in length to the peduncle of the upper ; the hand of the 

 second gnathopods is scarcely more than three times as long as the greatest breadth, but 

 neither is it in Czerniavski's figure fully four times as long. 



In the Challenger specimen of the female the second gnathopods are larger instead of 

 smaller than the first, and have the hind margin (as distinguished from the palm) longer 

 than in Czerniavski's figure, but they well agree with the figure which Czerniavski gives 

 for the second gnathopods of the young male, so that the very unusual circumstance 

 which he attributes to the female, of having the second gnathopods smaller than the 

 first, was probably accidental. 



Of Caprella inermis the following account is given by Haswell : — " Cephalon 

 terminating anteriorly in a minute mesial tooth. Neck very long ; first segment of the 

 body longer than the head and neck, the rest shorter. Superior antennas as long as the 

 cephalon and first segment of the pereion ; flagellum shorter than the last two segments 

 of the peduncle. Inferior antennas a little longer than the peduncle of the superior pair ; 

 flagellum shorter than the two last segments of the peduncle. Anterior gnathopoda short ; 

 propodos ovate, palm longitudinal, undefined. Posterior gnathopoda very large ; propodos 

 elongated, narrow ; palm excavate, uniformly concave, occupying about one-third of the 

 entire length of the propodos. Branchiae sub-cylindrical. Last pair of pereiopoda 

 longer than the others. Colour green. Length r 7 n ths of an inch. Hob. Port Jackson." 



This account obviously refers to a male specimen, and agrees so closely with the 

 Challenger specimen of the male as to require no comment, except the remark that the 

 length attributed to the neck or first peraeon-segment agrees better with Czerniavski'.s 

 than with the Challenger specimen. Mr. Haswell in his Eevision of the Australian 

 Leemodipoda retains the name Caprella inermis, and offers no opinion upon Mayer's 

 suggestion that it may be identical with Caprella danilevskii, probably from want of 

 opportunity to consult Czerniavski's work. 



(ZOOL. CHALL. EXP. PART LXVII. 1888.) XxX 159 



