CIRRTPEDIA—BORRADAILE 
129 
It was accompanied by a smaller specimen (Fig. 1), probably a young example of the 
same species. This, like the young stages of S. larvale and S. japoidcum* is indis¬ 
tinguishable in general features from the members of the section Arcosccdpellinn, s.s. 
It may be recognized among the other forms assigned to that 
section by the following combination of characters : the carina 
is continuously curved ; the lower border of the tergum is 
very oblique, and very slightly sinuous; the carinal border 
of the same plate is almost straight, very slightly convex in 
its lower part, about half of it projecting beyond the carina : 
the lateral border of the scutum is convex and notched distally 
for the reception of a projection of the adjacent angle of the 
upper lateral plate ; this projection alone prevents the upper 
latus from having a pentagonal shape ; the carino-lateral is 
deep, and notched where it meets the shoulder of the carina ; 
the umbo of the carino-lateral does not project beyond the 
outline of the capitulum ; the inframedian plate is tall and 
narrow, with slightly concave sides, and only a little broader 
at the base than at the distal end ; the rostro-lateral is trans¬ 
versely oblong, its umbo not projecting beyond the outline of 
the capitulum. The scales of the peduncle are sub-triangular, 
and broad, but not imbricating. The length of the capitulum 
is 6 mm. These specimens are from Station 340 (7° 5G' S., 164° 12' E., 100 fathoms). 
At Station 350 (off Granite Harbour, entrance to McMurdo Sound, 50 fathoms) there 
were taken three exactly resembling the smaller described above. 
Scalpellum (Arcosccdpell um ), spp. ? juv. 
I am compelled to describe here as new species two small 
Scalpella related to, but, as it seems, quite distinct from, that which 
I have treated as the young of S. discovery 1 . Very possibly they are 
the young of Mesoscalpella or Neoscalpella, and, it may be, of species 
already known to science. The same possibility exists in regard to 
other members of the section Arcosccdpellum , s. str., though it is 
necessary for purposes of reference that all such forms should receive, 
on their description, specific names of their own. 
Fig. 1. —Scalpellum ( Arco- 
scalpellum ) discover///, 
juv. (?). X 8. 
3. S. (J.) nympltonis, n. sp. (?). 
Fig. 
An Arcoscalpellum rather smaller than the early stage of S. di*- * IG - 2 - Scalpellum 
coveryi described above (length of capitulum 4*5 mm.), and differing njjmphonL^n ^sp (?) 
from it as follows: the uncalcified strips between the plates are wider; x 10. 
ipJA.'i 
* Pilsbry, loc. eit, and Bull. Bur. Fish., XXVI, pi. YI, fig. 4, 1907. 
n-iti 
