BilACHlUiNID.E. 51 



loped so as to have six short pointed spines, ^Yith broad bases ; the middle and outmost 

 pairs being rather the longest. 



Length, J„ inch. Habitat. Irrigation water in Egypt (Schmarda). 



Bbachionus rusTULATUs, Schmarda (135), (PI. XXXIV. fig. 16). 



SP. CH. Lorica broad, covered with papillce, the middle part of the dorsal surface 

 raised in the shape of a rhombus; occipital spines six; the posterior spines four, 

 equal. 



The pectoral margin is nearly straight, with a slight notch in the middle ; no toes 

 observed on the foot. [Probably retracted. C.T.H.] 



Length (of loric-a), -,L inch. Habitat. St. Juan del Norte, Central America 

 (Schmarda). 



Bbachionus LONGirEs, Schmarda (135), (PI. XXXIV. fig. 20). 



SP. CH. Lorica irap0^oi(?aZ; occipital spines 6' jo;; ]^ectoTalma.Tgbi ivithout spines ; 

 foot double the length of the body. 



Of the six occipital spines the middle are the longest, and are curved outwards ; 

 the outer somewhat shorter and turned inwards ; and the intermediate the shortest, 

 and almost perpendicular. The pectoral margin is slightly curved, and has a small 

 notch. The foot-opening, in the lorica, is semicircular, and without processes. The 

 toes are short. 



Total length, yj^, inch. Habitat. Near Pasto, New Granada (Schm.). 



Beachionus Leydigii, Colin (21), (PL XXXIV. lig. 19). 



SP. CH. Lorica sub-quadrate with six nearly equal occipital spines ; the pectoral 

 margin arc/ie^, ivith a sharp notch in the middle; the hind end triangular, obtusely 

 excised ; the dorsal surface marked with polygonal tessellations, ivhich are themselves 

 covered ivith a fine network of markings ; tlie foot transversely contractile; the ephip- 

 pial egg rough with papillce. 



The most noticeable points about this Brachionus are its tessellate dorsal plate, and 

 its foot. The former has twenty-one tessellations, arranged in five vertical rows (two 

 lateral of four each, two next of five each, and a central row of three), while the latter, 

 according to Cohn, admits of being greatly compressed transversely, so as to look like a 

 thin band. The lateral canals also have unusually large loops and coils. The contrac- 

 tile vesicle is large, and so are the egg-shaped gastric glands. 



Length (total), cir. j\ inch. 



Beachionus budapestinensis, Daday (208), (PI. XXXIV. fig. 25). 



SP. CH. Lorica rough, tessellated dorsally and ventralhj, rounded and spineless 

 behind ; occipital spines /oiir, the middle pair curved doivnwards and outwards. 



This species is remarkable for the unusual shape of the tessellations of the lorica, 

 especially on the dorsal side, where they are all bounded by curved lines. The minute 

 papilliB of the lorica occur on all the spines. The gastric glands are pear-shaped with 

 their pointed ends directed forwards ; and the inner surfaces of the rami are wavy, each 

 showing six undulations. 



Length, Not recorded. Habitat. Neighbourhood of Budapest (Daday). 



Beachionus quadeatus, lioussclct (PI. XXXIV. figs. 11, 12). 



SP. CH. Lorica nearly square, rough with minute, irregular, polygonal areo- 

 lations ; dorsal plate arched, sloping from behind forwards ; occipital spines six, the 

 middle pair the longest ; ventral plate nearly flat, ivith an undulating mental edge ; 

 three short spines, one mid-dorsal and two lateral, round the foot opening. 



This fine Brachionus was found by Mr. C. Rousselet, this year, in Epping Forest. 

 The lorica when seen by \ inch obj. with dark field illumination, is as beautiful as it is 



