igO JOURNAL OF CONCHOLOGY, VOL, I4, NO. 6, APRIL, I9I4. 



■■■• Isocardia cor L.— Moray. Firth, from trawlers (Simpson) t • . 



Cyprina islandica L. — Herm Island, valves (Tomlin). 



Astarte sulcata var. paucicostata Jeff. — Aberdeenshire. This 

 is Sowerby's fig. 19, pi. iv. 



var. scotica Mat. and Rack. — Outwardly, this variety cannot be 

 separated from the type ; inAvardly, the plain bevelled edge is the 

 only reliable character. Occasionally most of the other varieties are 

 combined with it. 



var. elliptica Brown. — Jeffreys' figure represents an intermediate 

 form ; Sowerby's is right. 



var. trigona Jeff— Aberdeenshire. 



- var. fusca Poli. — Aberdeenshire. 



A. compressa Mont. — Sowerby's figure (pi. iv., fig. 20) applies to 

 the var. striata. 



var. globosa Moll. — Off Aberdeenshire. In dealing with this 

 variety in the 'Lightning' Report, Gwyn Jeffreys gives it the later 

 name of var. warehavii Hanc, and writes : — -^' My variety g/obosa is 

 not Moller's species of that name, but agrees with a specimen from 

 the collection of the late Mr. Albany Hancock, which was named by 

 him var. 7varehatni. The A. sulcata of Gould (fig. 45) represents this 

 last variety."' But Gwyn Jeffreys does not here tell us what is 

 Moller's species if not this. Great doubts have prevailed as to what 

 \^ A. globosa Moll, and A. warehami Hanc, but I have little doubt 

 they are synonyms, and Moller's name has the precedence of four 

 years over Hancock's. Jeffreys at one time attributed A. warehajtii 

 Hanc. to A. f ah til a Reeve,- which it resembles in shape and sculpture; 

 but the latter has sharper beaks, a deeper and clean-cut lunule, is 

 ribbed only on the umbones, and obscurely rayed longitudinally. 

 Later on he attributed it to A. crenata Gray=^. crehricostata Forb.," 

 which it resembles in its more circular outline ; but the latter is a much 

 coarser and more regularly ribbed shell. The figure of A. compressa 

 \2uc globosa given by Sars, without author's name, "* appears to bean 

 aged and thickened specimen of the var. striata. The v3iV\ciy globosa 

 is not really more globose than tiie type, but it is much larger, cir- 

 cular instead of triangular, and the ribs disappear towards the margins. 

 Hancock's figure of the var. globosa as A. warehami'' is fairly correct 

 in outline, but is too coarsely executed. All the Arctic and British 

 specimens I have seen of var. globosa are outwardly nearly black, 

 indicating a habitat of tenacious black mud. 

 (To be continued). 



1 Moll. 'Lightning' and ' Porcupine,' Proc. Zool. Soc, 1881, p. 712. 



2 Moll. 'Valorous' Exp.,, Proc. Roy. Soc, vol. xxv., No. 173, p. 192. 



3 Arctic Post-Tert. Foss., Ann. Mag. N. Hist-;, 1S77, p, 234. 



4 Moll. Reg. Arct. Norv., tab. 6, figs, i a, b. 



5 Amy, .Mag. N. IJist., iS46,-vq1. xviii., p. -336, pi. v.,. figs, 15, i6, .."._. r 



