ygQ CRUSTACEA. 



slightly prominent either side of medial line, behind broad truncate 

 entire. Caudal appendages small, not shorter than abdomen, outer 

 lamella obliquely truncate at apex and 3-4-dentate (Plate 52, f. 6), 

 inner lanceolate and subacute. In the dentate outer lamella, this 

 species diners from all the preceding. Flagellum of anterior antennae 

 about seven-jointed; of posterior, fifteen to eighteen-jointed ; posterior 

 antennae very slender; anterior with basal joint stout. First three 

 pairs of legs more slender than the following ; second pair longer than 

 first or third; from fourth to seventh gradually increase in length. 

 Abdomen broadly truncate, so that the posterior margin is half as 

 long as basal, or even exceeds this ; ventral cavity of abdomen broadly 

 rounded at apex. 



Spheroma verrucauda? A. White, Voyage of Erebus and Terror, pi. 6, f. 1. 



b. Segmentum thoracis 7 mum medio marginis posiici dentem processumve gerens. 



Spheroma armata, Edwards. 



Bay of Islands, New Zealand, along rocky shores. 



Body smooth, a little shining, under a high magnifier granulous. 

 Seventh thoracic segment having a tooth behind, the tooth sometimes 

 obsolescent; last segment of abdomen triangular, sides obsoletely 

 sinuous, apex narrow and obtuse, dorsal surface near base with two 

 slight prominences ; cavity below narrow at apex (Plate 52, fig. 7) ; 

 caudal lamellae not reaching to apex of abdomen ; inner truncate ; 

 outer acuminate, tip curved outward a little. Flagellum of anterior 

 antennae eight to twelve-jointed ; of outer, fourteen to sixteen-jointed. 

 The legs of the fourth to seventh pairs are hairy on the posterior side 

 of third and fourth joints. Anterior three pairs nearly naked, and 

 not more slender than the following ; second pair longer than first ; 

 third about as long as second. Length, three to four lines. Colour, 

 whitish, bluish white ; also, brownish, with whitish spots. 



Spheroma spinigera. 

 S. armatae similis. Carpus depressius, Iceve, nudum, posticZ ad apicem 



