SEA LILIES, STARFISHES, ETC. CLARK. 121 



Family SPATANGIDiE. 



Genus Maeetia, Gray. 



Mahetia peloria,! sy. nov. 



(Plate xliv., fig. 1-3.) 



Length of test, 76 mm. ; breadth, 65 mm. ; height, 18 mm. ; 

 abactinal system 33 mm. from anterior margin ; mouth, 12 

 mm. Avide by 4 mm. long, with a very prominent hp, its 

 anterior margin 20 mm. from test margin ; periproct, 9 mm. 

 in diameter, on the vertical posterior end of test ; subanal 

 fasciole, distinct but narrow, its area 24 mm. wide by 4 mm. 

 high at middle ; bare sternal area nearly 30 mm. wide 

 posteriorly. Unpaired petal indistinct, virtually wanting. 

 Anterior petals very imperfect, but the posterior series of pore- 

 pairs can be distinguished for about 25 mm. from apex. 

 Posterior petals fairly well developed, about 35 mm. long and 

 7 mm. wide just proximal to the very shghtly narrowed tip; there 

 are rather more than 20 pore-paii's on each side of the petal. 

 Anterior ambulacrum, although not petaioid, is plainly indi- 

 cated as a gradually widening area, covered only by mihary 

 spines (or tubercles) ; proximally it is very narrow ; on each 

 side is a series of 12-15 simple tube-feet (or pores), at first 

 close together but near margin 3-4 mm. apart. Genital pores 

 4, large, but close together and concealed by the dense 

 growth of mihary spines which covers the whole abactinal 

 system and adjoining plates. Remainder of abactinal surface 

 covered closely by more or less curved, slender mihary and 

 secondary spines, pediceUarise and scattered primaries ; the 

 latter are nearly aU broken, but when complete are 15-20 mm. 

 long and taper to a very slender tip ; proxunally they are 

 hollow ; they are more or less distinctly cm-ved near the base. 

 In each antero-lateral interambulacrum there are about 35 

 primaries above the ambitus ; each is attached to a large, 

 perforated tubercle placed in a deeply sunken areola ; in each 

 postero -lateral interambulacrum there are some 50 similar 

 primaries, and in the posterior interambulacrum there are 

 about 25, but these latter are as a rule smaUer than the 

 primaries of the lateral areas. 



Actinal surface largely free from spines and tubercles of 

 any considerable size, except laterally and near anterior 



L 7r6\a'/j(os = huge, immense; in reference to the size, remarkably large 

 for a Maretia. 



