90 "TERRA NOVA" EXPEDITION. 



him recur in the examples in my hands. A further feature, not mentioned by Caiman, 

 is the elongation of the last two joints of the third maxilliped, each of which is more 

 than half the length of the basipodite and ischiomeropodite together. It is evident 

 that we have here a distinct local race, characterized by greater length and slenderness 

 of many of its parts. I propose for it the varietal name of gracilis. The same variety 

 was taken near Kaiser Wilhelm Land by the German South Polar Expedition of 

 1901-03. On the other hand, South Georgian examples in the British Museum, which 

 I have had the opportunity of examining, prove the correctness of Pfeffer's original 

 description, and it would seem that those taken by the "Belgica" in long. 80° W. 

 belonged to his form. If that be the case, the type variety is at present known to 

 extend from about 30° W. to about 90° W., and var. gracilis from about 80° E. East- 

 wards to about 160° W. Further information as to the distribution of these forms will 

 be of interest. 



Numerous specimens were taken at Stations 294, 314, 316, 338, 339, 348, 355. 



20. Aegean cataphractus (Olivi), 1792. 



Aegean cataphractus (Olivi), Zool. Adriat., pi. III., fig. 1 ; Heller, Crust. Siidl. Europa, p. 230, 

 pi. VII, figs. 12-15 (1863). 



The specimens, which are from New Zealand waters, differ from the Mediterranean 

 form as it is described by Heller only in the almost complete loss of indications of the 

 double nature of the keels of the second and third abdominal segments. It is probable 

 that some of the supposed species of Aegean will prove to be merely varieties of this 

 extraordinarily widespread member of the genus. 



Two specimens were taken at Station 96. 



Sub-order REPTANTIA. 



Tribe PALINURA. 



Family PALINURIDAE. 



21. Jasus, sp. ? /. verreauxi. 



The collection contains one specimen of a Jasus, in the natant stage. 



Similar specimens from Stewart Island in the collection of the British Museum are 

 referred by a label on the bottle, in the handwriting of Professor E.-L. Bouvier, to 

 /. verreauxi, which is a New Zealand species. 



One specimen. Station 96. 



Family SCYLLARIDAE. 



22. Arctus immaturus. Bate, 1888. (?) 



Arctus immattirus, Bate, "Challenger" Macrura, p. 71, pi. X, fig. 3. 

 The specimens differ from Bate's in that the antennular stalks are shorter, 

 not reaching the end of the antennae. They have appendages on all the 



