270 PROF. W. A. HERDMAN ON NEW 



(2) The Echinid Echinus acutus, Lamk,, was dredged in the Sound o£ 

 Mull, north of the Green Islands, from a depth of 20-30 fathoms on 

 July 16th, 1913. 



This is a southern form which occurs in the Atlantic to the west and 

 south of Ireland, and has apparently not been recorded previously from 

 Hebridean waters. 



The dimensions of our specimen are : — 

 Diameter of test = 54 mm. 

 Heights 36"5 mm. 

 Diameter of peristome = 17*5 mm. 

 Diameter of periproct = 6'5 mm. 

 Largest spine = 26 mm. 

 The bases of the spines are of a greenish colour. The conspicuous 

 characters of this Echinid when alive — which at once attracted my attention 

 to it in the dredge — were the comparatively few but very long spines, and 

 the general white coloration. 



(3) Amongst other more noteworthy Echinoderms obtained were : — 

 Antedon tenella (Retzius), as well as A. phalaiuiium (G. Midi.) and 



A. hifvda (Penn.). 

 Asterias muelleri (Sars), as well as A. ruhens. 

 Ophiocnida hracliiata (Mont.), with other commoner Ophiuroids. 

 Pliyllopliorus pellucidiis (Diib, & Ivor.). 

 Mr. H. C. Chadwick, who has examined these Echinodermata for me, 

 throws doubt upon the distinctness of the last species from P. drummondi ; 

 and he is inclined not to recognise the validity of the characters drawn 

 from the spicules known as '' tables '' in the integument of P. pellucidvs 

 and of P. drummondi. 



(4) Several boulders brought up (with much labour, and risk to the 

 dredging-gear) from some of our deeper hauls, on rough bottoms, yielded 

 a few examples of the rare solitary corals : — 



(?) Paracyatlius taxilianus, Gosse ; the Minch, 30 fathoms — a doubtful 

 species. 

 Carijophyllia smithii, Stokes ; off Ardnamurchan, 22 fathoms ; and 

 south of the Island of Eigg, 30 fathoms. 

 We also got the following other noteworthy Actinozoa : — 

 Epizoantlius incrustans (Diib. & Kor.), off A'^aternish Pt., Skye, 50 fathoms ;. 

 and E. coucJiii (Johnst.), Loch Hourn, 35 fathoms. 



Sarcodictyon catenata, Forbes, at many localities, and of three quite distinct 

 colours, viz. : — (1) the usual deep red, (2) pale yellow or creamy white^ 

 and (3) a bright cinnamon tint, exactly as figured by Forbes and Goodsir * 

 in 1851 from the specimen dredged off the Croulin Islands, and which they 



* Trans. Eoy. Soc. Edin. toI. xx. p. 307. 



