1903.] IN THE ‘ CHALLENGER’ COLLECTION. 71 
Furthermore, I had divided a number of species, enumerated on 
p- 949 as Group I. A. 6. 3, into two sections, according to 
difference in the thickness of the distal joints of the antenn. ped.; 
but a study of the types of S. prehensilis Bate and S. kréyeri 
Bate showed that Bate’s drawings of the antennule of these 
species are incorrect and misleading, wherefore my arrangement 
of them was wrong. 
It may be useful to put together the alterations and additions 
which may now be accepted in the Conspectus on pp. 949-51 in my 
earlier paper. In Group I. the following particulars must be 
added or altered :—To S. atlanticus H. M.-Edw. belongs only a 
part of S. atlanticus sens. Bate, besides the form referred by Bate 
to S. aneylops Kr. From S. arcticus Kr., 8. dissimilis Bate must 
be removed, and the latter species is to be established separately 
with S. mediterraneus H. J. H. as a synonym ; furthermore, some 
of the specimens referred by Bate to S. atlanticus belong to 
S. arcticus. Near S. arcticus Kr., must be inserted S. similis 
H. J. H., established on one of Bate’s specimens of S. atlanticus. 
S. prehensiis Bate and S. kréyeri Bate must be removed from 
their place and inserted above near S. japonicus Bate, together 
with S. profundus Bate, in its new restriction, and S. challengeri 
H. J. H., established on one of the specimens referred by Bate to 
S. atlanticus. SS. longirostris Bate must be withdrawn as being 
a Mastigopus to S. corniculum Kr., H. J. H., and S. cornieulum 
sens. Bate is the same species. As uncertain remain: S. dorsi- 
spinalis Bate, S. laterodentatus Bate, S. nasidentatus Bate, S. levi- 
ventralis Bate, S. rinkii Bate, ¢ Ky, all larval forms belonging to 
species related to S. areticus Kr., or perhaps partly belonging 
to S. arcticus itself; furthermore, the larve S. precollus Bate, 
S. utrinquedens Bate—both at least rather closely related to 
S. corniculum Kr., H. J. H.,—and S. semiarmis Bate. 
In Group IT. there is hardly anything to alter, but some additions 
to make. To S. edwardsii Kr. belongs S. edwardsii Ky., Bate, 
S. oculatus Kr., Bate, S. intermedius Bate, and S. ventridentatus 
Bate. WS. penerinkii Bate must be cancelled as synonymous with 
S. diapontius Bate; and the adult form described as S. penerinkii 
in my earlier paper must be named S. diapontius Bate, H. J. H. 
The rest of Group II. remains unaltered. S. fermerinkii Bate, 
S. spiniventralis Bate, and the species referred by Bate to 
S. armatus Ky. could not be interpreted. 
Besides, the investigation has yielded some results on the 
bathymetrical and geographical distribution of some of the species. 
It has been proved that the large specimens (exceeding 30 mm. 
in length) referred by Bate to S. atlanticus Ky. are deep-sea 
forms belonging to other species: S. atlanticus is common near 
the surface; according to Ortmann it has been taken in the 
intermediate net from 700-500 m., but it does not live in the 
greater depths of the sea. S. arcticws Kr. has a very wide 
geographical range, through the deeper to very deep tracts of the 
Ocean (see above); S. japonicus Bate has been captured in 
the northern part of the Atlantic and the northern part of the 
