No.lia. NOTES ON CYTHKRKA CUAStSATELLOIDKS— STEARNS. ,-J75 



Variety /, triradiata. 



In this we find the cliaracteristic f^rouiid tints of the two preceding 

 varieties, with the dnll ])uri)lish area in the region of the beaks, with 

 an intermediate, rather broad central ray, wliich in some instances 

 extends nearly or qnite to the ventral margin, thongh nsnally termi- 

 nating or fading into the general snrface color at a i)oint one-half or 

 one-third of the distance from the beaks to the lower margin. This 

 median ray is often composed of several narrow ones that interblend or 

 coalesce, ('ommon. 



GROUP III. 



Ground color irarm buff, pale ochre, or sieima yellow. 



Variety ;c, ochracea. 



In this gronj) we have e.\ami)les wherein the dominant tint of the 

 surface is warmer than either of the foregoing varieties, a warm, rather 

 dingy ochre or sienna yellow or ])ale yellowish brown, this (;olor being 

 more intense on the ni)i»er third or half of the valves, the lower part 

 showing more or less purplish, with zones of the same of a little darker 

 tint and the snrface of the valves rather obscurely ray(Hl with numer- 

 ous linear markings. The anterior slope darker, purplish brown or 

 brownish i^urple. 



Til is variety leads the way to and connects the foregoing groui)s (I, 

 II, and 111) with the darker groups and varieties below. 



GROUP IV. 



In this gronj* pur])lean(l brown tints i)revail, sometimes chestnut and 

 cho(;()iate. 



Variety A, purpureo-chocolata. 



Pale reddish brown to chocolate, with i)urplish tinge and conspicuous 

 or iiuionspicuous concentric i)urple /ones; fre(iuently obscurely radiately 

 lineated; anterior slo])e dark purple brown; unibonal region generally 

 dark, though sometimes light; extreme tips of beaks usually dark pur- 

 ple, sometimes light. 



GROUP V. 



Here we find shells with the dark ground tones of the preceding, but 

 ornamented with light rays. 



Variety /<, biserialis. 



This variety consists of examples with two white or light-colored 

 rays extending from the beaks; these rays are usually short; ground 

 color purplish brown or brownish-purple, with zones of pale purple 



