76 



26. Cryptopodus eruca, (Norman). 



(PI. XXXV, 2) 

 Enterocola eruca, Norman, Last Shetland dredging Report, p. 300. 



Specific Characters. Female. Body resembling in shape that of the 

 preceding species, but (in the specimens observed) more strongly curved and 

 with the constrictions between the segments deeper. Tail comparatively still 

 smaller than in C. brevicauda, with the caudal rami much shorter and without 

 any bristles. Anterior antennas apparently only composed of 3 joints. Posterior 

 antennae comparatively stouter than in that species, with the distal joint coarser 

 and only armed with 3 short denticles outside. Anterior lip with the posterior 

 edge divided into 6 very conspicuous tooth-like processes, 2 mediate and 2 

 on each side near the outer corner. The other appendages scarcely differing 

 in structure from t those in C. brevicauda. Ovisacs of quite an extraordinary 

 length, being more than 3 times as long as the body, and of narrow cylin- 

 drical form. 



Colour of the living animal not yet ascertained. 



Length of adult female 2.30 mm. 



Remarks. My identification of the above-described form with Norman's 

 Enterocola eruca is only based on its occurrence in the same host. For the 

 remarks given by Norman are much too scanty for allowing any more exact 

 comparison. It is undoubtedly congeneric with Canu's species, but differs con- 

 spicuously in the structure of the anterior lip, and more particularly in the 

 enormous development of the ovisacs. 



Occurrence. Two female specimens, the one ovigerous, of this form were 

 taken, many years ago, from as many specimens of Styela intestinalis collected 

 in the upper part of the Christiania Fjord. Norman also obtained his speci- 

 men from the same Ascidian. 



Distribution. Shetland Isles (Norman). 



Gen. 16. Enterocola, v. Benden 1860. 



Generic Characters. Body (of female) more or less slender, with the 

 anterior division well marked off from the posterior and divided by slight 

 constrictions into the normal number of segments. Tail more perfectly 

 segmented than in Ctyptopodus. Anterior antennas very small. Posterior 

 antennae much larger, with the terminal joint lamellar and fringed at the end 

 with spines or setae. Anterior lip rounded. Maxillae and maxillipeds rather 



