266 BULLETIN 76, UNITED STATES NATION.AL MUSEUM. 



There are only ii few iiitermari;inal spines near the base of ray where the mter- 

 marijinal papular areas are very wide. 



PapiiliP very numerous to an area. There are no small ])lates or grains embedded 

 in the integument, as in injlata. 



The two adambulacral spines are slender and tapering, some pointed, some 

 blunt. The outer is the longer as a rule, although both spines are not at all uniform 

 in length. There is no trace of a groove. Mouth plates with four marginal and 

 one actinal spine, therefore the same as injlata except in the form of the spines. 



The internal anatomy, madreporic body, and anal papillae are similar to injlata. 

 The ambulacral ossicles are slenderer than in injlata. Ampullae single. 



Type.—Q.a.i. No. 27778, U.S.N.M. 



Type-locality. — Albatross station 4407, oft" Santa Catalina Island, California, 

 .384-600 fathoms, rocks, shells, fme gray sand. 



Distribution. — Central and southern California, in 3.34 to 600 fathoms; possibly 

 ranging south to the Galapagos Islands and including Poraniopsis mira (Ludwig) 

 untenable. 



Specimens examined. — Two, the type and a smaller example from 3104, off 

 Half Moon Bay, California (lat. 37° 23' N.) 391 fathoms, coral; this not quite 

 typical. 



liemarks. — The differences which separate this form from injlata have been 

 noted above. It seems, from a study and comparison of material, that this is a 

 deep water race of the variable injlata. Some specimens of the latter approacli 

 Jlexilis. It is very likely that there is a continuous distribution of injlata from shallow 

 water into deep water and a consequent change of characters. Flexilis seems to be 

 variable also, and the presence of a less strongh^ differentiated specimen from off 

 central California, north of Monterey Bay, would lend color to the intergi-adation 

 hypothesis. 



Genus HENRICIA Gray. 



Linchia Forbes (not Nardo, 1834), Mem. Wernerian Soc, vol. 8, 1839, p. 120. 



Henricia Gray, .\tin. and Mag. Nat. Hist., vol 6, 1840, p. 184. Type U. oculata Gray =Asteria3 



sanguinolenta O. F. Miiller. — Bell, Ann. and Mag. Nat. Ilist., sor. 6, vol. 6, 1890, p. 472. 



Since then Bell, Grieg, Scott, Fisher, Clark, and others. 

 Cribclla Forbes (not Cribrella Agassiz, 1835), British Starfishes, 1841, p. 100. 

 Echinastcr Muller and Troschel, System der Asteriden, 1842, p. 22 (part). For some reason 



Echinaster has persisted in the writings of Storm 1878, 1879, Stuxberg 1878, 1886, Hoffmann 



1882, Jarzynsky 1885, Aurivilliua 1886, Brunchorst 1891, Appellof 1892 (see Ludwig, Fauna 



,\rctica, p. 473). 

 Cribrella LiJTKES', Vid. Medd. for 1856, 1857, p. 93; Gronlands Echinodermata, 1857, ]). Ml. 



Most authors since then except Gray 1866, Bell 1890, 1892, Grieg 1896, 1898, Scott 1897, Fisher 



1906, 1910, Clark 1909. 



Diagnosis. — Echinasteridae with a more or less close meshed skeleton bearing 

 numerous small spinelets either in grouj)s or scattered along the riilges composmg 

 the skeleton; marginal plates more or less distinguishable; adambulacral plates with 

 one or more spinelets placed deep within the furrow. 



