150 MR. H. CHARLTON BASTIAN'S MONOGRAPH 



a circlet of about six strong spreading seta^ ; no setae recognized on other parts of body. 

 Integument transparent ; striae not recognized. 



Teeth three, large, ■^" in length. (Esophagus about yth of total length, abundantly 

 marked with pigment arranged in three principal rows. Intestine densely covered with 

 very dark-coloured and almost black pigment-granules ; tessellate arrangement not very 

 distinct. Anus x^" from posterior extremity. Vagina anterior to middle of body. 

 Ova large. Excretory ventral duct opening opposite termination of anterior third of 

 oesophagus. 



Male, not seen. 



Sab. About roots of Algae and Corallines from tide-pools, Falmouth. 



4. E. iNERMis, n. sp. (Plate XII. figs. 173-175.) 

 Female, length \", breadth -yW- 



External Characters. — Body naked, tapering but very slightly anteriorly, though in 

 the usual way towards posterior extremity, which terminates in a rather undeveloped 

 sucker, in connexion with which the usual sucker-tubes were not recognized. Head 

 bluntly rounded, or even somewhat angular ; no papillae ; no setae. Integument with 

 faint transverse striae, toWo " apart, and also indistinct longitudinal markings. 



Teeth three, small, 3-0^" long, very close to mouth. (Esojjhag/is about yth of total 

 length, almost free from pigment, except anteriorly, where it is principally collected into 

 two reddish-brown ocelli-like masses, about 3-^" from anterior extremity. Intestine weil 

 covered with dark pigment-granules ; tessellation indistinct. Anus ■^" from posterior 

 extremity. Vulva posterior to middle of body. Excretory ventral gland could not be 

 detected. 



3Iale, length nearly the same as that of female, breadth ytj". Head provided with 

 four indistinct papillae ; posterior extremity broader than in female, and tapering more 

 abruptly behind anus ; two setae below anus, small ; no other seen. 



Spicules brownish yellow, curved, obtuse at points, xie" loiig; accessory pieces of 

 about half the length. Supplementary organ rather narrow, -^" above anus, and 2^" 

 in length. 



Hal). In small red sponges from crevices of rock, Falmouth. 



5. E. BKEVis, n. sp. (Plate XII. figs. 176, 177.) 

 Female, length \" , breadth ris"- 



External Characters. — Body scarcely tapering at all anteriorly, but considerably 

 towards the posterior extremity, Avhich is rather long and jiointed, terminating in a 

 distinct sucker ; sucker-tubes not recognized. Head rounded, having no papillas, but 

 provided with a circlet of 10-12 setae. Integument transparent, with very delicate 

 transverse and longitudinal markings. 



Teeth three, large, ytg" in length. (Esojjhagxs between ^th and ^th of total length ; 

 pigmentary dej^josits distinct almost to termination. Intestine well covered with dark- 

 coloured fat-particles, having a tessellate arrangement. Anus -g^" from posterior 



