Gutty .\farine Tjahoratort/^ St. Andrews. _' 1 



aiiil the niar'^iu passes externally and vciitrally to join the 

 aiitLM-ior folti, tliou.;li it does not rnn evenly into it, a noteh 

 or a fold separatinj^ it from tin; raise 1 anterior fold, which 

 sometimes iiiis a median projeetion with symmctrieal lateral 

 enrves, or in others slif^ht frdls. This ant<'ri()r or snpra-oral 

 fold does not project so far forward as in many Ter.l)Lllids, 

 and it sometimes shows an inner fold over the month. The 

 pale oranj^e tentaeles srem to be of moderate lenj^tli and 

 grooved, l)nt are somewhat more sleader and tapered than 

 in ordinary Terehellids. Helow the mouth !■< a well- 

 developed tonf^ne-like proeess, which pushes the rim of the 

 lirst sej^mcnt backward when it projects, and ventrally it has 

 a narrow rim. 



The body is comparatively short, and in the preparations 

 is less dilated anteriorly than in the ordinary Terebcllid. 

 It tapers posteriorly to a slender tail with a terminal anus, 

 which has four larj^e rounded pajjilliP, two dorsal and two 

 sli^^htly more i)rominent ventral. Dorsally the body is 

 rounded, ventrally flattened at the shields in front, and then 

 fjrooved tlironf;;hont the nst of its extent. Anteriorly 

 behind the dorsiil collar the setigerons papilhe approach the 

 median line, where a bilid |)roc(Ss occurs in front of them, 

 and from the sides of the divisions the branchial stem 

 originates — not always in the same place, for in some tiie 

 right branehia springs antero-laterally in regard to the 

 right process, whilst the left brauchia arises behind and to 

 the left of the left process. The free margin of the first 

 segment forms a continuous fold ventrally, which ends 

 dorso-laterally in a rounded free flap, and a process is con- 

 tinued dorsally beneath its edge to the representative of the 

 setigerons process, which lies immediately l)cliin(l the bifid 

 cone formerly mentioned. The next segment ventrally 

 lias a large free lateral flap on each side, whilst the median 

 is diflerentiated into a uarrow scute. The following seg- 

 ment has a still larger lateral flap, which stretcdics further 

 outward and upward and almost touches the base of the 

 branchial stalk in the ])re[)aration. It thins off toward tin; 

 narrow scute in the mid-ventral line. Laterally it ensheaths 

 the lamella in front of it. 



The ventral scutes are about seventeen in number, besides 

 four or Ave small terminal median scutts, and after them a 

 median groove with a raised line* continues to the posterior 

 end. Behind and above the third and fourth bristle-tufts 

 a smoothly rounded process or long papilla occurs, and in 

 some two are found behind the fourth. in the Irish 

 examples they are clavatc. (Occasionally a smaller iia[)ilLi 

 occurs behind the filth. 



