170 
to indicate that variegatus is, upon the whole, of smaller size than 
albocinctus. — With Ps. Huttoni this species is, evidently, more dis¬ 
tantly related. 
9. Pseudechinus grossularia (Studer). 
Amblypneustes grossularia. Studer. 1880. Ubersicht d. wåhrend d. Reise 
S. M. S. Gazelle 1874—76 ges. Echinoiden. Mo- 
natsber. d. Akad. d. Wiss. Berlin, p. 873. Taf. I. 5. 
_ — Th. Mortensen. 1904. The Danish Exped to 
Siam 1899—1900. Echinoidea. I. Kgl. Danske Vid. 
Selsk. Skr. 7. R. I. p. 105. PI. VI. 21, 33; PI. VII. 
13, 52. 
— H. L. Clark. 1912. Hawaiian and other Pacific 
Echini. The Pedinidæ .... Temnopleuridæ- 
Mem. Mus. Comp. Zool. XXXIV. p. 326. 
Through the kindness of Prof. R. Hartmeyer I have been 
able to reexamine the type and only known specimen of Studer s 
Amblypneustes grossularia which has so long puzzled the Echino- 
logists. The cursory examination of it which I have previously had 
the opportunity of undertaking in the Berlin Museum (Op. cit.), 
disclosed the important faet that it has not four pairs of pores to 
each ambulacral plate, as stated by Studer, but only three, and 
made me doubt that it could really be an Amblypneustes. The care- 
ful examination, which I have now been able to undertake, has 
shown that it is, indeed, no Amblypneustes, but belongs to the 
genus Pseudechinus, being a close relation of Pseudechinus Huttoni 
_ as, indeed, already suggested by Studer himself, who States 
(Op. cit. p. 874): „Vielleicht ist diese Art identisch mit der von 
Hutton angefiihrten Arbacia 1 ) globator, von welcher Hutton 
genau die gleiche Farbung angiebt, welche von der der suppomer- 
ten Art bedeutend abweicht“. 
To the detailed description given by Studer a few supple- 
mentary remarks may be given. First of all it should be pointed 
out that there are no sutural pores; indeed, I do not understand, 
how Studer has come to State the presence of these pores along 
the ambularcal sutures, no more than I understand, how he has 
found four pairs of pores to each ambulacral plate. There are 22 
ambulacral, 18 interambulacral plates in the type specimen, which 
measures 20 mm h. d. 18 mm in height. No crenulation is seen 
0 A lapsus calami for Salmacis. 
