98 Dr. W. T. Caiman on 



there is some evidence for the constancy of apparently trivial 

 characters in specimens from widely remote localities. A 

 striking- example is afforded by S. acutum, of which I have 

 heen able to compare, side by side, specimens from the 

 Kermadec Islands, the Gulf of Aden, aud the Cape Verde 

 Islands without finding any noteworthy differences. 



The classification here adopted is that of Annandale (1910), 

 -who retains, in its full extent, the old genus Scalpellum, 

 dividing it only into the two subgenera Smilium and Scal- 

 pellum, s. str. The criticisms of Annandale (1910, 1916) on 

 the more elaborate schemes proposed by Hoek, by Pilsbry, 

 and by Joleaud appear to be, on the whole, well founded. 



List of Species. 



Scalpellum (Smilium) trispinosum, Hoek. Java Sea, 73-175 fath. 



(^ ) nudipes, Annandale. Java-Australia, 130-500 fath. 



. ( ) acutian, Hoek. Gulf of Aden, 1200 fath., aud Cape Verde 



Ids., 990 fath. 



( ) beni/alense, Annandale. Gulf of Aden, 260 fath. 



{Scalpellum) ecaudatum, sp. n. Java Sea, 73-175 fath. 



( ) velutinum, Hoek. Java- Australia, 400-700 fath., aud Aden- 

 Zanzibar, 600 fath. 



( ) annandalei, sp. n. Gulf of Aden, 1200 fath., and Java- 

 Australia, 700 fath. 



, ( ) regina, Pilshry. Pernamhuco, 50-150 fath. 



( ) regulus, sp. u. Java-Australia, 800-1500 fath. 



. ( ) a'lcockianum, Annandale. Java-Australia, 700 fath. 



( )ji(ddi, ap. u. Java- Australia, 250-400 fath. 



( ) persona, Anuandale. Java-Australia, 400 fath. 



( ) portoricanum, Pilshry. Porto Pico, 180 fath. 



(■ ) rubrum, Hoek. Java Sea, 73-175 lath. 



^ ) novce-zelandice, Hoek. Gulf of Aden, 1200 fath. 



( ) gruvelii, Annandale. Gulf of Aden, 770-1200 fath. 



( ) laccadicicum, Anuaudale. Java- Australia, 400 fath. 



Scalpellum (Smilium) trispinosum, Hoek. 



Scalpellum trispinosum, Hoek, Rep. ' Challenger ' Cirripedia, 1883, 



p. 72, pi. vi. tigs. 15, 16. 

 Calantica trispinosa, Kriiger, Abh. Akad. Wiss. Mlinchen, math.-phvs. 



Kl., Supph Bd. ii. Abh. 6, 1911, p. 11, pi. i. fig. 1, pi. ii. tigs. 12, 13. 



Locality.— Lat. 7° 35' S., long. 114° 30' 30" E. (Java Sea), 

 73-115 fath. C./S. ' Recorder/ 4 $ , 1 $ . 



Remarks. — The specimens agree very ciosely indeed with 

 the holotype, the largest exceeding it only a little in size 

 (length of capitulum 15 mm.). The lines of growth on the 

 valves are not so sharp or so conspicuous as in Hock's 

 figure. There is some variation as regards the acuteness of 



