52 'J\ tilSLlON, 



(proxiiually and distally on tlic itimiulc) (iMiterafe. 'J'lie lip of tlie p. 

 with 2 (»I- 3 siuoolh segiiR'iits. Pj -j^ 12 mm. 1*2 '),:> mm. Pg and the 

 l'oll()\\iiiù: ones without a comb. Distal p. 27; I 1 mm. The segments: 

 L=1'/2X br, tiic 4 outoi'most ones with (Mstai iiooks. 



Disk thrown off. The })innuies of some arms witiiout aminiiac- 

 ral furrows. 



Botii tliese newly proposed sub-species of the polyform C. jKirvi- 

 cirra differ in many characteristics from each other. Thus for instance 

 ß has eoai'ser arm-bases and somewhat fewer Br-segments pr cm. but 

 it is chielly the different appearance of tlie comb that has caused me 

 to separate these two types and to denote them by different names. 



Within the sub-fam. Comaslermœ of the fam. Gornasteridœ one can 

 distinguish chiefly '^ different types of combs. The first of these, wliich 

 I should like to call the Co)«rtS<er-type, is characterized by a short, 

 strongly rolled comb, with some few, large and close teeth. The combs 

 occur on every second or third p. lo rather far out on the arm. The 

 second, the Goinanthus-type, has combs with a greater number of teeth, 

 which are small and low, and therefore thinly placed. They become 

 smaller proximally and distally and obliterate towards the tip of the 

 pinnule, leaving the latter smooth. The combs occur on a veiy few 

 proximal pinnules (never farther than P,;) and in an unbroken series, 

 that is never on every second or third p. as in type 1. The 3'' type 

 — to a certain extent an intermediate one — is the Fcr/u'rt-type, which 

 has rather high and large teeth right out to the tip of the pinnule. 

 Combs occur as in type 2 in an unbroken series. 



Both the first-mentioned types are usually very regularly asso- 

 ciated with certain genera within the above-mentioned sub-family 

 Gomaslerinw. Type 1 is found in the genus Comaster, type 2 is, as far 

 as I have been able to verify, characteristic of the genera ComanlUeria, 

 ConiaïUIiùui \'^), and Gomanthus (Genolia). In the genus GomaniJms (Vania) 

 the use of this chaiacteristic, like so very many others, becomes, how- 

 e\ei', impossible in the diagnosis. To Gomanthus- Vania are assigned 

 two species distinguished from each other by such an artificial charac- 

 ter as the number of arms. The facts of the matter are undoubtedly, 

 however, that Gomanthus (Vania) annulata represents one group of forms 



