152 A. E. Verrill — Revision Genera and Species of Starfishes. 



together, a crescent-shaped or semicircular pit, with a round central 

 pore and a wider rounded depression at each end. Sometimes one or 

 two granules exist close to the pedicellarise, and when rubbed off 

 the pits that they leave make the markings on the plates still more 

 complex. 



Pedicellariffi of this peculiar form are present on a large propor- 

 tion of the actinal plates ; on some of the marginal plates ; on the 

 borders of the spinose abactinal plates, around the bases of the 

 spines, 1 to 6 on a plate ; on the basal part of the spine itself ; and 

 on those abactinal plates that do not bear spines, 1 to 4 or more. 



On the actinal plates they are variously placed, and irregularly 

 oriented ; most of the plates have but one, which is most commonlj'- 

 near the center, but many have two ; those plates in the row next 

 to the adambulacral plates usually have two or three. The pedi- 

 cellariffi on the abactinal plates and on the spines are smaller than 

 those of the lower surface, but have the same form and similar 

 sockets. Each pedicellaria of the actinal and abactinal plates occu- 

 pies a small, slightly elevated, smooth, rounded or ovate area, sur- 

 rounded by granules. A pedicellaria and a stout blunt tubercle co- 

 exist on some of the actinal plates, near the jaws. 



Between all the abactinal plates, except those of the small inter- 

 radial areas, where there are no papular pores, there are small inter- 

 mediate ossicles, the larger of which bear small circular or angular 

 rosettes of about 5 to 9 prismatic, flat-topped granules, like those 

 around the margins of the large plates. One to three of the granules 

 occupy the center of these groups. Between these small rosettes 

 there are many small irregular groups of two or three similar angu- 

 lar granules, intervening between the numerous and rather large 

 papular pores, of which there may be ten or twelve around the larger 

 plates. 



The madreporic plate is very large, somewhat swollen, with fine 

 gyri. The apical plate is small and conical, similar in size and form 

 to the tubercles of the distal marginal plates. 



The two distal pairs of dorsal marginal plates are in contact 

 medially. On each of the distal adambulacral plates there is a 

 single large, obtuse conical spine, outside the furrow-series of slen- 

 der spinules. These sjDines are longer and larger than the more 

 numerous corresponding spines of the more proximal plates. There 

 are usually, in large specimens like the type, four stout, prismatic, 

 blunt, crowded spinules on each plate, in the furrow-series, as in G' 

 Lamarckii^ instead of three, present in G. cusjndatus. 



