GENUS A CINE TA. " 837 



that ciliated embryos are passed from the body of the parent into pocket-shaped 

 extensions of the cuticular membrane. Somewhat similar reproductive phenomena 

 have been likewise recently observed by the author in connection with Detidrosoma 

 radia?is. 



Acineta crenata, Fraipont. Pl. XLVIII. Figs. 32, 2,Z- 

 Lorica transparent, elongate-conical, about twice as long as broad, its 

 external surface finely crenulate and irregularly striate transversely ; pedicle 

 slender, about twice the length of the lorica ; enclosed animalcule ovate or 

 pyriform, occupying the anterior half of the lorica, and projecting to some 

 distance beyond its anterior border ; tentacles about twenty-six in number, 

 distributed over the anterior surface of the periphery ; usually one large 

 contractile vesicle developed towards the wider posterior region of the body, 

 and one smaller towards the narrower posterior region ; endoplast sub- 

 spherical or irregular in shape. Length of lorica 1-500". 

 Hab. — Salt water, on the zoophyte Clytia volubilis. 



Acineta vorticelloides, Fraipont. Pl. XLVIII. Fig. 42. 



Lorica rudimentary, consisting of a small cup-shaped expansion only of 

 the distal extremity of the supporting pedicle ; pedicle slender, four or five 

 times the length of the body; body subspherical ; tentacles developed 

 throughout the exposed peripheral surface, widest at their base, extensile to 

 a length equal to the diameter of the body ; parenchyma dirty yellow, often 

 enclosing oleaginous corpuscles ; contractile vesicle single, of large size ; 

 endoplast ovate, posteriorly located, rendered visible only by the action of 

 reagents, frequently enclosing minute granular endoplastules. Length of 

 body 1-500". Hab. — Salt water, on the zoophyte Clytia volubilis. 



This species is of special interest on account of the rudimentary condition of the 

 lorica, which is little more than a shallow cup-shaped expansion of the substance of 

 the pedicle. In this connection Acineta vorticelloides may be regarded as an 

 annectant type between the two genera Acineta and Podophrya. 



Acineta pusilla, Maupas. 



Lorica minute, compressed, subquadrate or lozenge-shaped as seen in 

 front view, having the anterior and posterior borders evenly rounded, and 

 the two lateral angles acuminate, the width somewhat exceeding the 

 greatest depth ; pedicle slender, rectilinear, slightly exceeding the lorica in 

 length ; enclosed animalcule almost completely filling the cavity of the 

 lorica ; tentacles short, four or five in number, distributed irregularly along 

 the frontal border ; contractile vesicle unobserved ; endoplast ovate, situated 

 towards the basal region of the body. Length of lorica 1-1800". 



Hab. — Salt water, on Bryozoa dredged off the port of Algiers 

 (Maupas). 



Acineta emaciata, Maupas. Pl. XLVIII. Fig. 18. 

 Lorica compressed, subquadrate, often wider than broad, the anterior 

 median angle being rounded so as to form an almost complete semi- 



