OF THE TKACHELIXA. 



629 



Among Confervse and Lemnce ; not com- ' specimens paler, 

 mon. _ 1-210" to 1-144" 



B. persicinum = Trichoda striata (?) preceding; rare. 

 (MiilL). — Colour reddish-yellow; young ' 



Fission transverse. 

 i\.t Bern, with the 



Genus ACINEEIA (Duj.) (XXVI. 21 a, ft).— Body oblong, depressed, or 

 lanceolate, with a row of cilia extending forwards on one side, which is curved 

 like a sabre. Distinguished from TracJielius by the disposition of the row of 

 cilia and the ciu'vature forwards. As in TracJielius, the examples of this 

 genus seem destitute of a mouth, and in this respect they especially differ 

 from those of Pelecida. 



AciNEEiA incurvata (xxvi. 21 a, b). — j pears to be -wdthout a reticulated and 

 Contractile, oblong, compressed, almost ' contractile integimient. 

 lamellar, roimd or obtuse behind, con- A. acuta. — Diaphanous, with granules 

 tracted and curved m front ; a row of , dispersed in its interior ; oblong, com- 

 cilia runs along the convex edge ; and ] pressed, pointed at its two ends ; or 

 there are five or six granular stripes, lanceolate, with one side more convex 

 and one or more variable vacuoles. | in front and fringed with cilia. 1-580". 

 1-590". In the Mediterranean. It ap- | In pond-water. 



Genus PELECIDA (Duj.). — Body iiexible, contractile, oblong, compressed, 

 roimded behind, curved in the form of an axe in front, ciliated throughout, 

 and fiu-nished with a mouth either visible or indicated by the various objects 

 met with in the interior of the animals. 



The animalcule assumed as the type of this genus is the Loxodes Rostrum 

 of Ehrenberg. It is stated to difler from the Paramecin a by the absence of 

 a contractile integument. Perty introduces it into his system. 



to four longitudinal folds. Colomiess. 



Pelecida Rostrum (Duj.) = Loxodes 

 Rostrum (Ehr.). 



P. costata (Perty). — Small; with two 



1-320" to 1-210". Bern. In ponds, &c. 



Genus LEMBADIOX (Perty) (XXVIII. 50, 51).— Body oval, rather ven- 

 tricose; with one more or less deep and wide furrow ninning nearly the 

 entire length of the ventral siuface. About twenty rows of cilia on the dorsal 

 aspect ; on the margin of the furrows, and at the posterior extremity, are 

 longer cilia. 



Internally from two to eight translucent large round vesicles are visible. 

 In Perty' s classification this genus is a member of the family Biu-sarina 

 (see p. 621). 



Lembadion 'hullimim= Bursaria hid- 

 lina (Miill.) (xxviii. 50, 51). — Hyaline, 

 filled with veiy delicate molecules ; the 

 spherical and often very large internal 

 vesicles differ much, both in number and 

 position. A proboscis-like process occiu's 

 at the anterior extremity. Movement 

 tolerably quick, often gyrating. Trans- 

 verse fission has been observed. 1-240" 

 to 1-190". In spring- water. Bern, Lu- 

 gano, &c. Ehrenberg has erroneously 

 cited the Bursaria hullina (Schranlc), 



which is identical with the present 

 species, as the same organism as his 

 Glaucoma scintillans. 



L. (?) duriusculum. — Colourless, ellip- 

 soidal, with a keel or ridge along its 

 upper siu'face ; the under surface some- 

 what concave. It appears tolerably stifi" 

 and firm in consistence ; the cilia are 

 very fine, and its movements sluggish. 

 1-720" to 1-620". The position of this 

 animalcule in this genus is doubtful. 



Genus HABMODIPUS (Perty). — Body globular, having a moveable elon- 

 gated lip or proboscis anteriorly. 



It is a member of the Trachelina (Perty), and is represented as being in 

 part equivalent to Amj)hUei)tus (Duj.) and to Trachelius (Ehr.). 



