NOTOMMATAD^E. 27 



each is a glassy rod, of thick base, which tapers somewhat abruptly near the middle to 

 a long point of great tenuity. 



Length, ^ to yJ T inch. Habitat. Lacustrine. P.H.G.] 



FUBCULAEIA MELANDOCUS, Gosse (169), (PL XXXI. fig. 18). 



[SP. CH. Body swollen, obtusely narrowed in front, tapering behind; brain saccate, 

 opaque at the extremity ; foot large ; toes conical, each terminating in a soft, slender 

 point, much produced. 



Of excessively versatile outline, rapidly lengthening and shortening every instant. 

 The front is apparently hard, with a sharp edge, below which is a broad, sub-prone, 

 ciliate face. An ample brain-sac its terminal portion filled with chalky deposit, usually 

 intensely black by transmitted light, but in some examples much diluted looks like a 

 bottle of ink swaying to and fro in the animal's contortions. 



The prolonged finger-like tips of the toes have a strong adhesive power, dependent 

 on a pair of great mucus-glands. A minute frontal eye is not quite certain. 



Length, T |o inch. Habitat. Woolston pond ; several examples. P.H.G.] 



EOSPHOEA. NAIAS, Ehrenberg (42), (PL XXXIII. fig. 9). 



SP. CH. Body hyaline, conical, not auricled ; toes much shorter than the foot. 



Ehrenberg says that the internal structure resembles that of Hydatina, except that 

 the mallei are one-toothed, and that he failed to find either an antenna or vibratile tags. 

 The brain is large, lies higher up than the mastax, and carries a transversely-oval red 

 eye. There are also two paler red spots on prominences on the frontal edge of the head : 

 these Ehrenberg considers to be eyes, but Leydig (110) maintains that they are nothing 

 but spots of a deeper orange hue than the rest of the edge of the corona ; and that naias 

 is a true Notommata, with only one eye, in the neck. Herr Eckstein (41), however, 

 agrees with Ehrenberg as to the nature of the spots. I have given Leydig's figure, which 

 is much more characteristic than Ehrenberg's, and shows the forcipate trophi, and the 

 frontal prominences, on the inner side of which the red spots are situated. 



Length, ^ to ^ mcn - Habitat. Berlin (Ehr.). 



EOSPHOEA DIGITATA, Ehrenberg (42), (PL XXXIII. fig. 10). 



SP. CH. Body hyaline, conical, not auricled ; toes one-third of length of foot. 



Very similar to naias, but with longer toes. 



Length, ^ inch. Habitat. Berlin ; among confervae (Ehr.). 



EOSPHOEA ELONGATA, Ehrenberg (42), (PL XXXIII. fig. 8). 



SP. CH. Body elongated, almost fusiform, slender, truncate in front ; toes short. 



Ehrenberg gives no more information about this animal than what may be derived 

 from his SP. CH., and his drawings. He had found it in 1831, and had drawn it ; but 

 had not met with it again. Herr Eckstein, however, (41) has carefully described and 

 figured this Botiferon ; and from his description the following account is derived. The 

 trunk is of an ovoid shape, with a distinctly separate head. The corona consists of 

 two wreaths of rather long cilia, among which are two spots with still larger seta3. 

 The three-lobed mastax lies behind and below the brain, the trophi are stout, and the 

 oesophagus is long and curved. The spherical stomach bears not only the usual gastric 

 glands but also a third very large gland, which crosses its middle as a transverse, broad 

 ring, divided by deep incisions into anastomosing parts. 1 The two foot-glands have each 

 a long tube leading to the end of the toes. The nervous ganglion, or brain, is three- 



1 This is, I think, an error. See the explanation of a similar mistake in the description of 

 Triophthalmus dorsualis, Sup', p. 32. 



