NO. 1555. HAWAIIAN H0L0THURIAN8— FISHER. 727 



hits s.vnonymy Theel gives a reference to Herapath." This figure is 

 that of some Ennpta. Lanipert'' lists ^ynnptd vittata^ with the 

 same reference to Herapath in synonymy. He, liowever, examined 

 a specimen at first hand, for he found " nmufroiis uKulrepwle hodlex.^' 

 No known species occurs which has madreporic bodies numerous 

 {Opheodesoma) and at the same time anchors and plates lils;e those 

 figured by Herpath {Euapta). Just as Doctor Ostergren says, in his 

 letter, different authors are trying to fasten Forskal's name on to 

 several different species of at least two genera. Sluiter has recently'' 

 listed a specimen of " Chondrodma vittata^^' basing his identification 

 on Jilger's description,"' but there is no telling what his 13-tentacled 

 species is. He gives no figures. 



Thus it would seem that all the comparisons of Oplu'odeminai<pecta- 

 h'dh must be made within the genus and not with S3"naptulas; Opheo- 

 desoma glahra is the only species which shows ver}^ close resem))lances 

 with spectahilis. 



Perhaps the erection of a new genus requires some defense. The 

 character of the anchor plates, the numerous madreporic canals, the 

 occasional presence of a cartilaginous ring difi'ering in structure from 

 that of Sy7iaptuhi, the presence of antei'ior projections on calcareous 

 ring divides the group of spectalilix^ (jlidri-a^ gi'!s,((^ and .ser/wtdiiHt very 

 sharply from that of [/odeifroyi and lappa. In respect to the cartilag- 

 inous ring, specfabi/is bridges the gap to Sy)a(j>tida., but the diffei-- 

 ences in deposits are sharp, while the ring itself is diti'ei-ent in structure. 



Genus PROTANKYRA Ostergren. 



Synapta (part) Authors up tcj Ostergren. 



Protcmkyra Ostergren, Ofv. Ak. Forh., lA', 1898, p. 1 Id. Type, Siitiaptaahysxicuhi 

 Theel. 



Tentacles 10 to 11 digitate with four or five digits. Retractor mus- 

 cles and cartilaginous ring absent. Anchor arms serrate, the vertex 

 without minute knobs or granules; stock or handle branched occa- 

 sionally. Anchor plates without abruptly narrowed handle and with 

 numerous irregular holes. Almost always an irregular perforated 

 arch over the attached end of plate, united with latter in sevei'al 

 places. Circumference of plate uneven or incomplete. 



« Quarterly Jour. Mic. Sci., 1865, pi. i, lig. 6, is exact reference, according to 

 Lampert. 



6 Seewalzen, p. 216. 



'Siboga Holothurioidea, p. 126. 



'^De Holothuriis, 1833, p. 1-1. 



