366 Albany Maseuiti Records. 



to compare this species with H. herscheli, but they appear to have 

 been of the muititul)ercalate type as in H. perarinutai^ Freeh. 



The following are the characters of the pygidium : — 



Tail broadly triangular, a little longer than broad, and about as 

 deep at the proximal part as broad. Axiii separated from the sides 

 by a furrow caused by a tiatteningout of the ribs amounting almost 

 to a discontinuance ; en(_ls of the pleural ribs slightly in advance 

 of the axial ones at the fiirrow. Thirteen distinct ribs, those on 

 the sides very faint towards the apex. In the axis tliere are three 

 irregular rows ot strong recurved spines, a portion in the figured 

 specimen shows a cast of these ; on the outer row they are 10 mm. 

 long. On the thirteenth axial rib, or on the twelfth and thir- 

 teenth combined, there are too strong spines supporte<l on an 

 elevated base The pleural riljs bear also spines arranged in a 

 double series along a line nearly parallel to the margin antl at the 

 height of the terminal double spine of the axis. 



Tlie ribs end on a false margin, beyond which the surface is 

 vertical and without ornamentation. The area between the true 

 and false margin is straight-sided, widening to the strongly marked 

 articular facet. The last botly ring covers this facet without 

 having the i-idge of the false m.argin. 



The body rings as a wliole are extraordinarily spinose ; in the 

 smaller specimen there are the bases of no less than four spines 

 immetliately inside the fulcrum, but the larger specimen shows 

 two large spines supported on a swollen basis as in Salter's speci- 

 men PI. XXIV., fig. ;'), The margins of the pleura are rounded. 



Width 5.6 cm. Depth, 5.9 cm. Length about 7 cm. 



Cat. Nos. 6, 8. Donor : Mr. A. G. Bain. Locality, Cederbergen. 

 Cat. No. 1444, Type. Donor : Mr. A. G. Bain, collected by 

 Mr. P. Mader. Locality, Clanwilliam. 



Homahmotus ag resits., nov. sp. 



PI. IX., Figs. 2a, 2b. 



This form is characterised hy the very rapid tapering of the 

 pygidium and the incui-vetl margin. Oidy one portion of the 

 pygidium is known. 



