SCHIZOPODA. 
13 
smooth ; dorsal denticles in two pairs, the first situated at about two-thirds of the 
distance from the base of the telson to the insertion of the sub-apical spines, second 
pair just above the spines. 
Uropods sub-equal in length, rather slender, extending to the level of the 
insertion of the sub-apical spines of the telson. 
Preanal spine small and simple. 
A fuller description of this species is not possible, since the single specimen is 
in bad condition and dissection was not desirable. 
The species belongs to that group of the genus with a posterior median dorsal 
spine on the third segment of the pleon, and is distinguished from the other members 
of the group by having an equally developed spine on the fourth and fifth segments 
of the pleon in addition. It presents no very near kinship with any described 
species of the genus, and from the depth at which it was captured is probably a deep¬ 
water form. 
Euphausia vallentini. 
(Plate IV., F'igs. 4-6.) 
Euphausia splendens {pars), G-. 0. Savs, 1885. 
*Euphausia vallentini, Stebbing, 1900. 
Euphausia vallentini, Holt and Tattersall, 1906 (1). 
Localities of captures: —Lat. 56° 54' S., long. 170° 28' E., two specimens, male 
and female, 19 mm. 
I have carefully compared these two specimens with two of the types from the 
Falkland Islands which the Rev. T. Stebbing kindly* sent me, giving me at the 
same time full permission to dissect them if necessary. The ‘Discovery’ specimens / a o^- q 8-8- 
are in perfect agreement with the types, and I have nothing to add to Stebbing’s ' 
description except a note on the copulatory organs on the first pleopod of the male. 
In the course of working out this collection the authorities of the British 
Museum kindly allowed me to examine and dissect two of the ‘ Challenger ’ specimens 
labelled Euphausia splendens by Sars. They were from the second of the localities 
given by Sars on p. 82 of his “ ‘ Challenger ’ Report,” viz., “ October 21, 1875, South 
Pacific.” It became at once apparent on examination that one of these specimens 
did not agree with Sars’ description, since the antennule was furnished with a large 
evenly rounded lappet on the basal joint, very conspicuous in lateral view.* Further 
examination showed that it probably, indeed almost certainly, belongs to the present 
species. It is true that I could not see the spine on the third pleon segment, but 
the specimen is in very poor condition, and if, as I suspect to be the case, the 
spine has been broken oft’, the scar would be difficult to detect. 
I give (Plate IV., Fig. 5) an outline sketch of the rostrum and the basal joint 
* Examination of the ‘ Challenger ’ types of E. splendens shows that this species possesses a small 
antennular lobe, but it is nothing like so well developed and conspicuous as in E. vallentini (see Hansen 
(1905 (2)), Holt and Tattersall (1906 (1), and below, p. 14.) 
von. IV. 
F 
