360 VERRILL 



COSMASTERIAS POLYGRAMMUS (Sladen, 1889) Verrill. 

 Stichaster polygrammus SLADEN, op. cit, 1889, p. 434, pis. c, cm. 



A diplacanthid species, easily distinguished by the conspicuous 

 transverse or banded arrangement of the dorsal and lateral spines and 

 plates. The dorsals and superomarginals form about seven longi- 

 tudinal rows. The spines are small and numerous, arranged in nar- 

 row transverse rows of three to seven on the ossicles. The major 

 pedicellariae are large; some of them are felipedal. Papular areas 

 are in regular rows. Ventral plates bear four or five spines in the 

 transverse rows. Position of genital pores unknown. 



The type was from 245 fathoms, west of Magellan Strait. 



Leipoldt considered this a form of Cosmasterias sulcifera. The 

 differences are notable. 



COSMASTERIAS BRANDTI (Bell) Verrill. 

 Cosmasterias brandti (BELL, 1881, p. 91, pi. ix, fig. i, as Asterias). 



The dorsal and lateral plates are said to be about eleven in each 

 transverse row, and to bear small spines, in transverse series. It may 

 be the same as C. polygrammus. 



Trinidad Channel, at 30 fathoms. 



COSMASTERIAS FERNANDENSIS Meissner. 



Cosmasterias fernandensis MEISSNER, 1896, p. 104, pi. vi, fig. I, as Asterias. 

 [Polyasterias] fernandensis de Loriol, op. cit, 1904, p. 41, pi. in, figs. 

 4-8 (rays unequal, five or six). 



This has been recorded by Loriol from Gulf San Mathias, E. Pata- 

 gonia. The type was from Juan Fernandez. It appears to be auto- 

 tomous, though often five-rayed. 



GASTRASTER STUDERI de Loriol. 

 Gastraster studeri DE LORIOL, 1904, p. 34, pi. iv, figs. 3~3/. 



This has four irregular rows of podia proximally, but only two 

 rows on the distal half of the rays. Its relations are obscure. It may 

 be allied to Granaster biseriatus Koehler. 



From Gulf San Mathias. 



Genus Adelasterias Verrill, nov. 

 Type, A. papillosa (Koehler, 1905, as Diplasterias) . 



This is diplacanthid and is covered everywhere with a thick der- 

 mis, which rises into numerous papilliform processes, both on the 



