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 1 have 

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

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

 Islands without finding any noteworthy differences. 



The classification here adopted is that of Anuandale (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 (1 ( .)1(), 1916) on 

 the more elaborate schemes proposed by Hoek, by Pilsbry, 

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



List of Species. 



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



( ) nudipes, Annandale. Java-Australia, L30-500 fath. 



i ) acutum, Hoek. Gulf of Aden, 1200 fath., and Cape Verde 



Ids., 990 fath. 



( ) be»t/ale?ise, Annandale. Gulf of Aden, 260 fath. 



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



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



Zanzibar. 600 lath. 



( ) annandalei, sp. n. Gulf of Aden, 1200 fatk., and .lava 



Australia, 700 fath. 



( ) regina, Pilsbry. Pernarnbuco, 50-150 fath. 



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



( ) alcockianum, Annandale. Java-Australia, 700 fath. 



( )juddi, sp. u. Java- Australia, 250-400 fath. 



( ) persona, Annandale. Java Australia, J00 fatk. 



( ) portoricanum, Pilsbry. Porto Rico, 180 fath. 



( ) rubmnn. Hoek. Java Sea, 7.'!- 175 fatk. 



( ) novee-zelandice, Hock. Gulf of Aden, 1200 fath. 



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



( ) laceadivicum, Annandale. Java-Australia, 400 fatk. 



Scalpellum {Smilium) trispinosum, Hoek. 



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



p. 72, pi. vi. Hits. 15, 1(>. 

 Calantica trispinosa, Kriiger, Abh. Akad. Wiss. Miinchen, math.-phys. 



KL, Suppl. Bd. ii. Abh. 6, 1911, p. 11, pi. i. tig. 1, pi. ii. figs. L2, L3. 



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

 73-115 fath. C./S. ' Recorder/ 4 g , 1 <£ . 



Remarks. — The specimens agree very closely indeed with 

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

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

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

 figure. There is some variation as regards the acuteness of 



