I. '08. 69 



the eyes. Superiorly its margin is strongly ascendant from 

 the caiina of the carapace ; anteriorly it is deepest, and almost 

 squarely truncate, showing no trace of an apical point. 



The carapace is dorsally carinate almost to its posterior edge ; 

 anteiiorly it is produced to a strong spine at the base of the 

 orbit, while another spine, which reaches about as far forward, 

 marks the antero-lateral angle. From the orbital notch a 

 strong carina runs the whole length of the carapace, disap- 

 pearing shortly before reaching the posterior margin ; below , 

 a deep groove branches off from this carina and extends almost 

 to the base of the carapace, forming the posterior limit of the 

 hepatic region, while a fainter groove defines the superior 

 limit of the same region. The rostrum and carapace com- 

 bined are less than half^ the length of the abdomen, excluding 

 the telson. 



The abdominal somites are all dorsally smooth and rounded, 

 and none are produced posteriorly as spines ; the fourth is 

 notched at its infero-posterior angle, but this is possibly due 

 to an injury. The sixth somite is more than twice the length 

 of the fifth. The telson is longer than the sixth somite, but 

 is shorter than both inner and outer uropods ; it tapers to a 

 very narrow apex armed with a few spines, and is furnished 

 dorso-laterally with numerous pairs of very minute spinules. 



In the single specimen the cornea of the eyes is damaged ; 

 near it on the inner face the stalk bears a minute and very 

 obscure tubercle. The antennular peduncle is not half the 

 length of the antennal scale, the basal joint being much the 

 longest, and furnished with a scale which lies closely pressed 

 against it laterally. The antennal scale is more than half the 

 length of the carapace and rostrum combined ; externally it is 

 convex and produced distally to a short spine which reaches 

 beyond the rather narrow apex of the lamellar portion. 



The oral appendages differ in a few details from those of 

 Acanihephyra purpurea : the terminal joint of the mandibular 

 palp (fig. 2) is rather longer and less expanded, the 

 basipodite of the second maxilla (fig. 4) is divided into 

 tw^o portions, of which the anterior is very much broader than 

 the posterior, and in the second maxillipede (fig. 6) the dac- 

 tylus and exopod are both longer, the former being about half 

 the length of the propodus. 



The external maxillipedes are much the same as in ^. pur- 

 purea , but the penultimate joint is somewhat longer ; they 

 reach very slightly beyond the tips of the antennal scales. 



All the pereiopods are provided with exopodites, those of the 

 last pair being the shortest, and in all the ischium and merus 

 are thin and broadly expanded. The first pair reaches to 

 about the middle of the ultimate joint of the outer maxilli- 

 pedes, the merus is about three times as long as broad, and 

 the carpus ' is about equal in length to the propodus ; in the 

 second pair, which reaches to the tip of the antennal scale, 

 the merus is slightly broader and the carpus is shorter than 



lAlcock states that in his specimens the rostrum and carapace com- 

 bined are little over half the length of the abdomen. 



