RECENT OPmURANS. 241 



588. A. AUSTRALIANA H. L. Clakk, 1909. Mem. Austr. mus., 4, p. 540, pi. 52, t. 1-3. 



2 PARATTPES. New South Wales : off Wata Mooli, 54-59 fms. 



589. A. GEMINATA (Leconte). Plate 6, f. 7, 8. 

 Ophiolepis geminata Leconte, 1851. Proc. Acad. nat. sci. Phil., 5, p. 317. 



Amphipholis geminata Ljtcwgmah-, 1867. Ofv. Kongl. Vet.-akad. Forh., 23, p. 313. 



4 specimens, including a cotype. Panama. 



590. A. GRACILLIMA (Siimpson). Plate 6, f. 5, 6. 

 Ophiolepis gracillima Stimpson, 1852. Proc. Boston soc. nat. hist., 4, p. 224. 



Amphipholis gracillima Ljungman, 1867. Ofv. Kongl. Vet.-akad. Forh., 23, p. 314. 



4 specimens, including a cotype, and also a cotype of Amphipholis januarii 

 Ljungman. South Carolina: Charleston, near Fort Johnson. St. Thomas, 

 D. W. I. Brazil: Rio Janeiro, 4 fms. 



591. A. GRANULATA (LtJTKEN and Mortensen). 



Amphiura gramdata Lutken and Mortensen, 1899. Mem. M. C. Z., 23, p. 155, pi. 10, f. 1-4. 



2 coTYPES. Locality? Presumably eastern tropical Pacific. 



592. A. JAPONICA Matsumoto, 1915. Proc. Acad. nat. sci., Phil., 67, p. 71. 



1 COTYPE. Japan: Misaki, Arai Beach. 



593. A. KINBERGI Ljungman,. 1871. Ofv. Kongl. Vet.-akad. Forh., 28, p. 646. Plate 6, f. 9, 10. 



1 COTYPE. Cape of Good Hope. 



594. A. KOCHII LtJtken, 1872. Ov. Kongl. Danske. vid. selsk. Forh., p. 84, pi. 1, f. 6a, 6. 



1 specimen. Japan : Misaki, Aria Beach. 



595. A. LAEVIDISCA H. L. Clark, 1909. Mem. Austr. mus., 4, p. 541. Plate 6, f. 3, 4. 



Holotype. Chile: Talcahuano Bay. 



596. A. PENTACANTHA, sp. nov. (Trfcre, five -|- amfSa, spine). Plate 6, f. 1, 2. 



Disk 4 mm. in diameter; arms about 12 nam. long. Closely related to A. 

 squamata but readily distinguished from that species and all the other members 

 of the genus by the absence of tentacle-scales and the number and length of the 

 arm-spines. The disk-covering consists of somewhat coarser scales than in 

 squamata but the radial shields, upper arm-plates and mouth-parts are essentially 

 as in that species. There are 5 arm-spines on the basal arm-joints but the num- 

 ber quickly drops to 4 and distally to 3; the spines are subequal or the upper- 

 most is longest, hollow, rather slender, bluntly pointed and are (at least on the 

 basal joints) half again as long as an arm-joint. The tentacle-pores are large; 

 on the first arm-joint of two of the arms, there are two tentacle-scales at each 



