284 MR. CYRIL CROSSLAXD OX THE [Feb. 16, 



As in all previous collections the tube was not obtained, an 

 interesting fact seeing that the modifications for the tubicolous 

 habit are as well marked here as in any species of this group. 



It is remarkable that this widely- ranging species, occuiring as 

 it does between tide-marks and down to 23 fathoms, should be 

 absent from Semper's Philippine and fi-om the ' Challenger ' 

 collections. Since its collection in the south of Japan in 1876 I 

 find no mention of its occurrence until Gardiner bi'ought it from 

 the Maldives in 1900 and I from East Africa in 1902. 



Lately Pi'of . Mcintosh has published an account of a form from 

 70-200 fathoms oft' the Canadian coasts, which he doubtfully 

 identifies with this species *, hinting that further researches may 

 prove its identity with 0. gruhei Marenz. and Nothria tenuisetis 

 Mcl.t 



Genus Lysidice. 



Lysidice collaris Gr. 



This very widely distributed form is here represented by only 

 two specimens, one from the I'eef of Manadu Atoll, the other 

 dredged from 25 fathoms, bottom hard rock, oft" S. Nilandu Atoll. 

 Both specimens are of a fair size. 



Ehlers remarks on the possibility that the L. collaris of the 

 Indian Ocean may be the same as the Mediterranean species of 

 this genus. A comparison of all available Indian Ocean specimens J 

 with four European § of Lysidice n'metta shows tliat the species 

 ai'e certainly very closely allied. 



The proportions and foi-m of the body are the same exactly, 

 viz. of nearly uniform diameter fi-om the head onwards and flat 

 below, strongly arched above. 



I am indebted to Prof; Mcintosh for the following description 

 of the colour of L. ninetta when alive. It is strikingly like that 

 characteristic of the Indian Ocean form li : — 



" Head is pale brownish, dappled with pale dots, the nuchal 

 border being rather darkei'. The first thi-ee segments are tinted 

 of a deeper brown hue than the rest of the body and dappled with 

 pale spots. The fourth segment is pale anterioi-ly, and this makes 

 a contrast with the preceding. In some the posterioi- border of 

 this segment is brownish and speckled with white dots, in others 

 it is white as is also half the succeeding {Ehlers). A specimen 

 ti-awled oft" Sark had only a white patch between the eyes instead 

 of the usual white belt on the 5th segment. The coloration 



* Annals & Mag. Nat. Hist. ser. 7, vol. xii. 1903, p. 152. 



t ' Cliallenger,' vol. xii. 



X Viz. the above Maid ivan, five from East Africa, one brought from the Seychelles 

 by Dr. E. P. Wi-ight. 



"§ Two large specimens given to me by Prof. Mcintosh and collected by him 

 between tide-marks in Guernsey and two small ones purchased from Naples. 



II Crossland, " The Marine Fauna of Zanzibar," P. Z. S. 1903, vol. i. p. 169. 



