iSTBBOISBA 01 NOBTB PACITO INT UMACENT WA 147 



Green phase a Aim- bended dark een and brigl earn 



coloi Inns olive green, groups of spines cream color, yellowish about 1 1 n-i r 



bases i Dark sage green without bands, Bpines whitish (also young with s\ 

 pale (d Major Bpines acervate mottled oh un color 



specimen similar to pi. 63, fig 3 i < ream color, papular areas apple-leaf g 



• i n like pi ■ 



\ specimen <>f the green phase maj have been the type of Brandt's 

 epichlora. 



Anatomical notet Abactinal plates: There is considerable individual and 

 variation. The abactanal reticulum i>. of course, always irregular The carina] 

 plates are four lobed and overlap over a third of their length, forming h , 

 irregular Beries In alveolata there is one large Bpine and one to four small 

 on each carinal, l>ui in troaehelii the Large >i'in.- is often without an Dor- 



Bolateral plates of rather unequal size, irregular in shape, s itimes Bubtriangular 



mid connected by secondary ossicles also irregular as to size and shape. Marginal 

 and actinal plates closely imbricated, decreasing in sue from the Buperomargmal 

 to the Loner actinals The plates are arcuately Lozenge Bhaped to four lobed, the 

 dorsal lobe the longest. In the case of the actinals and inferomarginals it Btn ngly 

 underlape the descending lobe of the plate, just above There are basically three 

 Beries of actinals, with a shorl fourth Beries in verj large examples, in contrast to 

 the tax (or seven of E echinosoma. 



The actinostomial ring (pi. 59, fig. l 1 is small, the actinostome being about as 

 |>r<>ittl ns the length of the Brst if ambulacra] ossicles (or the tir>t pair i>i 

 The median suture between the two halves of the Bret enlarged pair i- Berrate and 

 the length of the dorsal crest i- that of tin' next -i\ pint.- a verj common propor- 

 tion in the Asteriidae. The odontophore has a characteristic form remim 

 of the valve of a small chiton -hell The interbrachial septum i- small owing to 

 the small size of the disk. There i- a pillar of plate- extending upward from the 

 odontophore, and between this and where the true arm plates end at the mt«r- 

 brachial angle there is an uncalcified membranous septum in mediun 

 mens. In the giant examples the whole septum appears to he tilled with pi 

 and in these specimens the rather triangluar entrance from the disk coelom to that 

 i>f the arm i- surprisingly small and filled by a much folded lobe of the ventral 

 Btomach. 



The gonads open doreally, close to the interradial line, about one-third r from 

 the margin; and in general form are elongate fusiform with numerous fusiform 

 lobes on the mesial side, these being subdivided into short globular lobuli 



intestinal eOOCUm i- tripartite; the Btomach is rather crowded in the small disk, 

 and the hepatic COOCS are large and extend nearly to the end of the long Ia\- 



Polian \ 



Type locality q) ■ ' ■'■■ Depaxtun B British Columbia. 



Remarks. — This forma corresponds to Dr. William Stimpa 

 M- -i\ era! specimens labeled by him are ho the collection of the United Su onal 



Museum He considered trowhelii to be a distinct 



I think Doctor Stimpson's identification of Brandt's i if com 



imem are not uncommon. It would lead to endless confusion to »•■ 



