ALASKAN HYDROCORALLIN^. Ill 



uncommon among caged birds of this and allied species, and some- 

 times seen in wild specimens. This figure is the basis of Frin- 

 gilla mexicana Muller (Syst. Nat. Suppl., 1776, p. 165), and also 

 of Emberiza mexicana Bodd. (Tabl. P. E., 1783, p. 23). This 

 bird must, therefore, be called Carpodacus mexicanus (Miill.), or, 

 should intergradation with C. frontalis be proven, C. frontalis mexi- 

 canus (Miill.). 



ON SOME HYDROCORALLINyE FROM ALASKA AND 



CALIFORNIA. 

 By W. H. Ball. 



(Read March 22, 1884.) 



The descriptions herewith, with one exception, are of species 

 from an area from which none have hitherto been described.* 

 They are closely allied to species found in the Oregonian and Cal- 

 ifornian province described by Prof. Verrill, but have been, by his 

 kind assistance, compared with his types, and appear to him and to 

 myself to be distinct species, differing not only in habit and form, 

 as well as relative size of the calyces, but especially in the sculp- 

 ture and texture of the surface of the corallum. It is quite proba- 

 ble that the other species may hereafter be found in southeastern 

 Alaska, in which case the fauna would comprise — 



AUopora venusta Verrill ; Allopora VerriUii Ball ; Allopora cali- 

 f omit a Verrill ; Allopora Moseleyi Ball ; Allopora papulosa Ball. 



To complete the list of Alaskan coralloid animals, Calligorgia 

 compressa of Verrill may be added, as found in the Aleutian Islands, 

 the only representative of the sea-fans yet known from the region, 

 which is, however, extremely rich in Sertularian hydroids. 



Allopora Verrillii, n. s. 

 Ccenosteum thin, reptate, whitish to pale rose pink, solid, en- 

 crusting ; with a smoothish irregularly lumpy surface pretty regu- 



*A Stylaster rosso-americanus Brandt has been mentioned (Z. "Wiss. Zool., 

 x.vii, 292), but has never been described or figured. It may be an additional 

 species. 



