-174 SALMACIS GLOBATOR. 



S rarispina and T. toreumaticus. In each genua Ave find species recalling, 

 by their general appearance, some species of the other, — Temnoplenrus 

 Reynaudi, at first sight, recalling more a Salmacis than a Temnoplenrus. as 

 Salmacis globator reminds us more of Temnoplenrus than of Salmacis, — and 

 it may be advisable hereafter, with additional material, to limit these genera 

 somewhat differently than they are here defined ; as. however, we know, from 

 the little the young of these species teach us. that they are subject to very 

 great changes (luring growth, it would only have added confusion to a, group 

 which presents already sufficient difficulties to have adopted or modified the 

 genera thus far proposed by Girard and myself, I have preferred to retain 

 the old subdivisions till our material enabled us to make a Revision upon 

 a sounder basis. 



The test of this species is quite stout; coronal plates narrow; the tu- 

 bercles of the whole test are remarkably uniform in size, though somewhat 

 larger on the actinal side, forming, as in S. hicolor, regular horizontal and 

 vertical rows; the upper part of the coronal plates is occupied by small 

 miliaries closely packed, and extending between the primary tubercles. In 

 specimens measuring lid""" there are as many as six vertical rows on each 

 side of the median line at the ambitus in the interambulacral. and three in the 

 ambulacra! space. The poriferous zone is comparatively narrower than in 



the other species of Salmacis, the pores being closely crowded together ill 

 the short arcs. The prominence which the furrows of the horizontal sutures of 

 plates, extending from the poriferous zone to the median line above the am- 

 bitus, take, is remarkable ; in some cases they become pits as deep as any 

 we find in Temnoplenrus. and are disconnected, as in that genus, near the 

 poriferous zone, while in other specimens they are barely marked ; generally 

 the furrows are more marked near the median line of both areas. The 

 actinostome is sunken ; the tubercles of the actinal surface do not decrease 

 rapidly towards the actinostome ; there are no sutural furrows on the actinal 

 side : the actinal cuts are mere broad undulations. The spines are short, 

 stout, pointed, except a few longer spathiform spines near the actinostome; 

 they are dark green at the base, tipped with violet. The color of dry denuded 

 tests is grayish, tinged with light purple ; the sutural furrows of lighter color, 

 and yellowish on the actinal surface. The abactinal system is remarkable for 

 its large genital plates and comparatively minute ocular plates excluded from 

 the anal system. The genital openings are large, elongate. The genital plates 

 carry a few small tubercles on the anal edge ; anal system covered by large 



