150 MR. H. CHARLTON BASTIAN'S MONOGRAPH 
a circlet of about six strong spreading setæ; no setæ recognized on other parts of body, 
Integument transparent ; striæ not recognized. 
Teeth three, large, 545” in length. Œsophagus about zth of total length, abundantly 
marked with pigment arranged in three principal rows. Zntestine densely covered with 
very dark-coloured and almost black pigment-granules ; tessellate arrangement not very 
distinct. Anus qy” from posterior extremity. Vagina anterior to middle of body. 
Ova large. Exeretory ventral duct opening opposite termination of anterior third of 
cesophagus. 
Male, not seen. 
Hab. About roots of Algæ and Corallines from tide-pools, Falmouth. 
4. E. INERMIS, n.sp. (Plate XII. figs. 173-175.) 
Female, length +”, breadth 47": 
External Characters.—Body naked, tapering but very slightly anteriorly, though in 
the usual way towards posterior extremity, which terminates in a rather undevelopel 
sucker, in connexion with which the usual sucker-tubes were not recognized. Head 
bluntly rounded, or even somewhat angular; no papillæ ; no setz.  Integument with 
faint transverse striæ, 55560 apart, and also indistinet longitudinal markings. 
Teeth three, small, 33535" long, very close to mouth. Œsophagus about ith of total 
length, almost free from pigment, except anteriorly, where it is principally collected into 
two reddish-brown ocelli-like masses, about 315" from anterior extremity. Znéestine well 
covered with dark pigment-granules; tessellation indistinct. Anus 35” from posterior 
extremity. Vulva posterior to middle of body. Æxcretory ventral gland could not be 
detected. 
Male, length nearly the same as that of female, breadth 115". Head provided with 
four indistinct papillze; posterior extremity broader than in female, and tapering more 
abruptly behind anus ; two setze below anus, small; no other seen. 
Spicules brownish yellow, curved, obtuse at points, yi,” long; accessory pieces of 
about half the length. Supplementary organ rather narrow, sy” above anus, and 555 
in length. 
Hab. In small red sponges from crevices of rock, Falmouth. 
5. E. BREVIS, n.sp. (Plate XII. figs. 176, 177.) 
Female, length 1", breadth 414". 
External Characters.—Body scarcely tapering at all anteriorly, but considerably 
towards the posterior extremity, which is rather long and pointed, terminating in 4 
distinct sucker ; sucker-tubes not recognized. Head rounded, having no papillæ, but 
provided with a circlet of 10-12 sete. Integument transparent, with very delicate 
transverse and longitudinal markings. 
Teeth three, large, 143” in length. Œsophagus between 4th and 4th of total length; 
pigmentary deposits distinet almost to termination. Intestine well covered with dark 
coloured fat-particles, having a tessellate arrangement. Anus 35” from posterior 
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