514 On Entotoa from the Murman Coast. 



but tlie two portions of the oe?opliagus are, relatively to the 

 whole body, considerably shorter, especially the anterior 

 portion, which is only about half the length there given. 

 Thus, in a specimen about 14 nun. long the anterior part of 

 the oesophagus measures only 1'02 mm., the posterior part 

 0*78 mm., and in a 37 mm. specimen the two parts measure 

 I'S mm. and 0'8 mm. respectively. This seems to indicate 

 that a good deal of variability exists. 



Dr. Cockayne informs me that these worms were not 

 found, as usual, in capsules, but were embedded in the liver 

 of the fishes or just under its covering membrane. Wlien 

 the liver was placed in a dish, they sometimes wriggled out 

 quite freely. 



Ascaris sp. ? 



From one of the fishes, among examples of A. capsularia, 

 there is one small larval Ascarid of another species. It is 

 about 10 mm. long, having a head with three rudimentary 

 lips and a boring-tooth, and a gradually tapering tail about 

 0*2 mm. long, without a tail-spike. There is a conspicuous 

 excretory cell running back to about 1*8 mm. from the 

 anterior end. The oesophagus is about 1 mm. long, and there 

 appear to be no oesophageal or intestinal diverticula. 



SpiruridsB. 



Streptocara &^. [? S. pectmifera (Neumann)]. 



Host : Uria grille. Yukanski, 27. vi. 1917. 



Neumann, in 1900, described a small nematode from the 

 common fowl and guinea-fowl under the name of Spiroptera 

 pectinifera. This has been made the type of a new genus — 

 Streptocara — by E-ailliet and Henry*. 



The present collection contains a single female specimen of 

 a worm which evidently belongs to the same genus, and 

 answers so closely to the description of S. pectinifera that it 

 may be specifically identical. The absence of a male, how- 

 ever, renders determination uncertain and description compa- 

 ratively worthless. The specimen in question was found in 

 the crop of the host. If the species is identical with S. pecti- 

 7iifera, it is remarkable that it should occur in hosts so 

 distantly related as the common fowl and the black 

 guillemot. 



» Compt. rend. Soc. Biol. Ixxiii. 1912, p. 622. 



