STARFISHES OF THE PHILIPPINE SEAS. 221 



larger than the type, that from station 5586 having R:=141 mm., 

 r=-il mm. The specimen from station 5587. which is nearest jordani 

 in general appearance, has a relatively smaller disk than the large 

 specimen, and another, Avitli R=:78 mm., from station 5582. 



A comparison of the specimens with Koehler's description of Ps. 

 mozaicus (1909, p. 50, pi. 1, fig. 3) indicates that the principal dif- 

 ferences are the presence of superomarginal spines in mozaicus, 

 fewer central granules on the abactinal plates, fewer transverse 

 series of superomarginal granules, and fevrer subambulacral spine- 

 lets. However, the large specimen has 4 to 6 short, sharp, lateral 

 spines on each of the plates of the interbrachium, these becoming 

 reduced to 2 or 3 on the outer part of the ray. None of the others 

 show a sign of the spines, yet they appear to belong to the same 

 species. 



Koehler writes that all of his 15 specimens of Ps. mozaicii.s had 

 superomarginal spines. Moreover, he states that as the external bor- 

 der of the plate is approached, the granules elongate and become 

 conical spinelets, among which 1, 2. or even 3 are conspicuous by 

 being longer than the others. In the large specimen, above men- 

 tioned, the granules do not gradually become longer, but there is an 

 abrupt transition at the angle between the dorsal and very low 

 lateral face of the plate. In Koehler's figure the spines are plainly 

 shown as being spaced on the outer third or even half of the plate. 

 In his observations on the Indian specimens of jordani Koehler 

 states that on the edge of the plates [outer edge, as I understand it] 

 the granules are somewhat elongated and occasionally form small 

 pointed cones. His largest specimen had R=64 to 70 mm.; perhaps 

 there is a tendency in the old specimens of this species to acquire 

 lateral spines. 



The following differences seems to separate the Borneo and 

 Molucca specimens of jordani from Ps. inozaicus as described and 

 figured by Koehler. In mozaicus the larger abactinal plates have 

 5. 6, or 7 central well-spaced granules, in addition to 20 to 26 slen- 

 derer peripheral ones; in jordani there are 8 to 15 central granules 

 on the larger plates, and upward of 20 in the largest specimen. 

 Koehler states that the gi^anules of the superomarginals form about 

 5 transverse series; in jordani I fuid 7 or 8, and the series are not 

 at all regular. In mozaicus the furrow spines are generally 5; 

 in jordani 6 or 7. Koehler describes the subambulacral spines as 

 forming 2 series close together and a little irregular, with 2 to 4 

 spines in each; 1 or 2 in the first series is much longer than the 

 others. This would indicate that the total number of spines does 

 not exceed 8; 12 to 20 is the usual number in jordani., although in 

 small specimens it is less, and they do not form series. Three to 5 

 enlarged subambulacral spines stand on the proximal, and 2 or 3 



