208 HUITISII I'ALyi'lO/OIC; IMIYI.LOCARIDA. 



" (2) 'IMh! (jtlicr vii;w is tliat Uk.'.sc; iiiiiiiiiilrt were ecto-paraHitic Phyllopods, 

 iilMioii^^'li Mioy liad iioi lost, tlioir jjowcr of free inovemont, yet had become special- 

 JHod ill I ho loriii of llicir liody, wliicli is flattoncd voiitrally and oidy Hli},ditly 

 (convex al)()vc, tin' wIkiIc iiiiiiii:il ln'iiij,' expanded liorizontally, iiidikc inoKt, otlier 

 IMiyliopodH. ThiH vicnv iingiil account. \'<>v tlio two large round Ktructures Boeii on 

 I, ho v(!ntral Hnrfacc, Hitiiatcd oni! on cillici- Hide of llie l)Ofly, and close to the 

 untcriof niar^dn of I ho hIu'II. 'IMichc ini<^dit pOHsibly rcpi'esonl a pair of ventral 

 Hiickci's, Hucili as ai'o scon in tln' niodmi fiKh-licc^; (liese structures, whatever they 

 may he, :\ri; ovidontly cnoi'mously ilcvi'io|)C(l, and poHscHS ^vv.d nuisclcs, which 

 produce prouiinint. niodificatioiiH oC I lie dorsal shield, whore they ai'c attached. 

 The ^vi-,\\. hdiruni niijdil possibly repri'sent- the sucloriid t ul)c of /l;v//'/'/.s-, under 

 cover of whiidi are (joncealcd the redu(!ed rn;Hidibl(\s, &c. 



" Some ol' IIk^ Hpecinions show curious obli(pi(,' scars on the coxa) of the legs, 

 which may indicate the poiids of att.acliincnt oT spines or setae to enable the 

 parasite to stick to its iishy host." 



No'l'K ON l/i'lirt<r(iiilla urciilld (see pages 201} — 205). 



Ml-. .John Snnlh.or K 11 winning, informs us (September .^th, iH'J'.i) that the 

 " liinn, Dairy," wher'e he got the I'emains of Lrhcsconiid nrcnl I ((, \ii the "Linn 

 Spout, omi mile south-west- oi' Dab'y," In the ' (latalogne of Western-Scottish 

 Kossils,' 187(i, page 77; and he refers us to the papei- on "The Upper Limestone 

 of Noi-th Ayrshire," by Mr. Holx'i-I, Craig, of Beitii, ' Trans. Geol. Soc. Glasgow,' 

 vol. viii, pp. 2H — :{.'). At page Ji2 the " Upper Linn Limestone" is described, tbo 

 S(«clion iit Linn Spout being — 



I. LiiiicKliirjt' ,,,... 



li. Sliiilc, very l'()Hnilil'ci'c)iiM ..... 



i). l/iini'Ht.Diit' ...... 



4. tSluilc, lull 111' i'(i.Hi(l(iiinnii/ii piiin/ii/illii 



T). Jiiiiu<Ht(itir ...... 



(I. iSIimIc, iiiiliii'iili'd ...... 



7. Ciiiil, Irdiii 2 led to . 



4!) 10 



The Lchc^riiiiHii was collected by I\l r. .1. Smith In the shale. No. -f, abounding 

 with a fossil bIicII b)rmerly known as Hsllnriu /iinirl(ilill((, Jones. See the 'Trans. 

 (Jeol. Soc. (!las,!;-ow,' vol. 11 (lS(i7), p. 71, and vol. i.\ (LS'.U), pp. 85—87. Hence 

 this sind(< has been known locally by the inaccurate name of the " l*]stlierla-bed." 

 It is I'cgai'ded by some as of esluariim origin. 



