264 



A. E. SHIPLEY 



averaged about 18 mm . Their colour when alive was whitish with a 



slight yellowish green tinge posteriorly. 

 Recently howeverE. Borgstrôm in his Inaugural Dissertation (1) 



for the degree of Doctor at Upsala has given us a much fuller 



account of this parasite, which leaves little doubt that the species 



is a distinct one. He gives the follo- 

 wing scheme for difïerentiating 

 betwen E. turbinella and E. brevi- 

 collis : 



E. turbinella. — The relation 

 between the breadth of the hinder 

 part of the body and the length of 

 the animal is about 1 to 7. The 

 hooks on the proboscis are in 19-20 



KJ 



l 



Fig. 3. — Echinorhynchus brevi- 

 collis Malm. — A, female; B, 

 maie; C, head, magnified. 



longitudinal rows. 



E. brevicollis. — The relation 



between the breadth of the hinder 



part of the body and the length of 



the animal is about 1 to 12. The hooks on the proboscis are in 



24-25 longitudinal rows. 



Borgstrôm agrées with the view first promulgated by von Linstow 

 that E. ruber Collett is identical with E. turbinella Dies. He has 

 found the same species, but in a rather younger and smaller stage, 

 in the Common Rorqual, Balœnoptera musculus which feeds largely 

 on fish and is, of the larger Whales, the most fréquent visitor to 

 our shores. 



The species Echinorhynchus pellucidus F. S. Leuckart founded for 

 the réception of the parasite described by F. S. Leuckart (2) from 

 the intestine of the Common Dolphin, Delphinus delphis L. has a 

 very close resemblance with the species first described by Diesing 

 as E. turbinella. It is slightly smaller than the larger spécimens of 

 this species being in the female 13 mm in length, in the maie slightly 

 over o mm . Collett's spécimens ranged from 10 to 25 mm but Leuckart's 

 examples may not hâve been mature. The proboscis, covered with 

 hooks, seems to be fully extruded in the spécimens figured (lig. 4). 

 This is followed by a région devoid of hooks or scales. In Leuckart's 



(1) Published by P. A. Norsted and Sôner. Stockholm, 1895. 



(2\ F. S. Leuckart. Brèves Animaiium. . . . descriptiones. Heidelberg, 1828. 



