382 On Tnhahxtants of the GiU-chamhers of Land-crahs. 



xi./xii. The ova, wlien liberated, are provided with a larojc 

 supply of yolk. The oviducts have not been made out with 

 certainty, but it is probable that they are, as nsual, simply 

 outpushiiigs of the septum xii./xiii. to meet the body-wall. 



The spomiathecee open on either side at the septum iv./v., 

 and run backwards for a short distance as narrow tubes. 

 Between the first and second septal •rlands each expands into 

 a larger chamber with folded walls, and from this a duct runs 

 inwards at right angles to open into the oesophagus. The 

 openings are lined with long cilia projecting into the lumen 

 of the gut. The narrower distal portions of the sperma- 

 thecal ducts are covered externally with five longitudinal 

 rows of t>lai;d-:'olls. 



Lateral view of the anterior end of Enchytraus parasiticus. Some of 

 the internal organs are represented as seen by transparency. 



^r., brain; C/., clitellum ; /., intestine ; M., mouth; M.Ph., muscular 

 pad of pharynx ; iV'.C., nerve-cord ; Ov., ova ; <S'.i, S.2, 'S'.:,, the three 

 pairs of septal glands ; Sp., aperture of spermatheca ; Sp.S., sperm- 

 sac; S y spermiducal pore. 



Enchy tragus parasidcits, sp. n. 



Diagnosis : — Length 8—9 mm. JS'umber of segments about 

 70-bO. Chcetce 2 j-ier bundle. Brain nearly straight behind. 

 Spermatheca; narrow distally, tcith 5 rows of g^and-cells ex- 

 ternally / expanding into a pouch ivith folded walls before 

 ojyening by a wide ciliated ajmrture into the cesophagus. 



Ilab. Interior of the gill-cliambers of a land-crab, Gecar- 

 cinus quadratus, ^Saussure [?=6r. ruricola, L."^]. Clarion 

 Island (Pacific Ocean). 



* Concerning the nomenclature of tho host, Dr. W. T. Caiman kindly 

 submits the following note : — 



" The specimens from Clarion Island are labelled Gecarcinus quadratus, 

 8aussure, and 1 do not venture to dispute the identification, although I 

 am uuable to form any clear concejitiou of the distinguishing characters 



