DESCRIPTIONS OF GENERA AND SPECIES 339 



(4) Enelijrtraeus adriaticus, Vejdoysky. 

 E. adrlaticus, Vejdovsky, SB. Bohm. Ges., 1877, p. 303. 



E. adriaticus (forma jaltensis), CzEENiAVSKY, Bull. Soe. Nat. Mosc, 1880, p. 32a. 

 Definition. Length, -\.^mm.; number of segments, 25; setae, 3 jser bundle. Brain convex 

 posteriorly. Anteseptal part of nepJiridium liardly narrower than postseptal, with coiled 

 lumen. Spermatheca with short duct covered by three rows of glawlular cells. Hah. — 

 Austro-lllyrian coast-line ; Jalta. 



(5) Enchytraeus monochaetus, Michaelsen. 

 E. monochaetus, Miohablsen, JB. wiss. Anst. Hamb. 1888, p. 66. 



Definition. Length, 7 mm. ; setae in four rows of a single seta each ; setae usually tvanting 



upon the first four or five segments, lateral setae wanting upon a few segments after. No 



salivary glands. Brain deeply cleft behind. Nephridia bent at right angles, anteseptal part 



not much more than funnel, duct not sharply marked off. Spermathecae with a long duct as 



long as, and sharply distinguished from, the pear-shaped pouch, a few glands at base. 



Hob. — South Georgia, sea-shore. 



This species is most remarkable for the ' cephalization,' met with in no other 



Enchytraeid. Michaelsen states that the cuticle is unusually thick. In the buccal 



cavity is a taste-papilla. Besides the other characters mentioned in the above 



definition, the species has one pair of small septal glands in the fourth segment, 



two pairs of larger glands in the fifth segment, and three pairs of very large ones 



in the sixth segment ; the sperm-duct funnel is short. 



(6) Enchytraeus arenarius, Michaelsen. 

 E. arenarius, Michaelsen, ibid. 1889, p. 12. 



Definition. Length, i o mm. ; setae, 3 per bundle. Brain deeply cleft behind. Anteseptal part 

 of nephridia little more than funnel, duct arises near to septum as in Mesenchytraeus. 

 Spermathecae cylindrical with no distinction between pouch and duct, external pore toith 

 glandular cells. Hub. — Germany {Elbe shore). 



Michaelsen describes as a remarkable character of this species the form of 

 the perivisceral corpuscles; these are furnished along one side with numerous 

 pointed processes. The blood, moreover, is yellow — the present species being the 

 only one of the genus which shows this Pachydrilus-\ikQ character, if we ' except 



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