OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 295 



of Pasiphsea amplidens, Bate, the point curves downward and does not reach 

 beyond the eyes. From Bate's specimen part of the peraeon and all the pleon were 

 unfortunately missing. In having the fourth joint of the first perseopod smooth and 

 that of the second serrate it agrees with our species, but apart from this there are 

 several differences. The mandibular cutting edge here shows nine to ten teeth, 

 compared with thirteen in P. amplidens. The first maxilla of the latter is said to 

 agree closely with that of P. cristatus, Bate, which according to the figure has the 

 middle lobe fringed with seven spines and two spinules, against the eighteen spines 

 of the Scotia species. Moreover, here the fingers of the second peraeopods are 

 fully as long as the palm, and the fourth joint has only seven teeth along the 

 margin, while Bate's figure shows fifteen teeth along that margin and fingers much 

 shorter than the palm. 



The telson is about five times as long as its greatest breadth, narrowing towards 

 the apex and widening a little at the fork, which is occupied by eight pairs of 

 graduated spines. In the first antennae the acicle does not reach the end of the first 

 joint, which is as long as the second and third combined, the second being consider- 

 ably shorter than the third ; of the two flagella, one for a space is much broader than 

 the other. The scale of the second antennas is much narrowed at the flattened apex, 

 beyond which the terminal tooth is well produced. The first and second maxillipeds, 

 as noticed by Bate, are as firmly attached as if they together formed a single 

 appendage. 



Localities.— Lat. 71° 22' S., long. 16° 34' W., depth 1410 fathoms; Station 417, 

 March 18, 1904. A second smaller specimen, with anterior process broken off, was 

 obtained at lat. 68° 32' S., long. 12° 49' W., by the vertical net from surface to 600 

 fathoms; Station 422, March 23, 1904. 



Phye rathhunsB, n. sp. 

 Plate XXXI. 



In this species the central carina of the carapace is not produced over the eyes, 

 and the telson is only about three and a half times as long as the greatest breadth, 

 its apical fork fringed with nine pairs of graduated spines, of which the innermost 

 pair is minute. In many respects its proportions differ little from those of the 

 preceding species, but in the first antennae the flagella are less unequal at the base, 

 and in the second the distal tooth of the scale is less prominent, the middle lobe of 

 the first maxilla is fringed with thirteen spines, the first peraeopods have the fourth 

 joint serrate with nine teeth and the fingers more instead of less than half the 

 length of the palm ; in the second peraeopods the second and third joints as well as 

 the fourth are serrate, the fourth joint having as many as seventeen teeth or small 

 spines, and the fingers are rather shorter than the palm. 



The earlier-known species, with which the present is most closely related, is that 



