CIRRIPEDIA— BORRADAILE. 



129 



It was acGompanied by a smaller specimen (Fig. 1), probably a young example of the 

 same species. This, like the young stages of S. larvale and S. japonicum,* is indis- 

 tinguishable in general features from the members of the section Arcoscalpellum , s.s. 

 It may be recognized anaong 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 ^'^^- ^- Scalpellmi {Arco- 

 . 1 /. 1 11 1-1 scalpellum) discoveryt, 



the capitulum. ihe scales oi the peduncle are sub-tnaugular, j^^ m ^ 8 



and broad, but not imbricating. The length of the capitulum 



is 6 mm. These specimens are from Station 340 (7° 56' S., 164° 12' E., 160 fathoms). 

 At Station 356 (off Granite Harbour, entrance to McMurdo Sound, 50 fathoms) there 

 were taken three exactly resembling the smaller described above. 



Scaljjellum [Arcoscalpellum), 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. discoveryi. 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 Arcoscalpellimi, 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. 2. 



3. »S'. [A.) nymphonis, n. sp. (?) 



An Arcoscalpellum rather smaller than the early stage of S. dis- 

 coveryi described above (length of capitulum 4' 5 mm.), and differing 

 from it as follows : the uncalcified strips between the plates are wider ; 



Fig. 2. — Scalpellum 



(^Arcoscalpellum) 



nymphonis, n. sp. (?). 



X 10. 



Pilsbry, loc. cH. and Bull. Bur. Fish., XXVI, pi. VI, fig. 4, 1907. 



T 2 



