ANUE^AD^E. 85 



drawn into its lorica, and a very broad, stout, clove-shaped antenna hanging over the 

 middle of the mental edge of the lorica. It is, of course, just possible that the dorsal 

 antenna might take such a position, if the head were much curved to the ventral 

 surface : but I have never seen anything like it. 



Length, y^ to ^ v inch. Habitat. Berlin (Ehr.). 



ANUK2EA TESTUDO, Ekrenberg (42), (PL XXXIV. fig. 31). 



SP. CH. Lorica quadrate ; with six straight and nearly equal spines in front, 

 and two short spines behind ; both dorsal and ventral plates rough, the former tes- 

 sellated. 



This species differs from aculeata in the near equality in length of the front spines, 

 the shortness of the hind ones, and the roughness of the ventral surface, all characters 

 of somewhat doubtful constancy. Ehrenberg says that there are four teeth in each 

 uncus, that the gastric glands (unlike those of serrulata] have no stalks to attach them 

 to the stomach, and that the eye is transversely oval. He also says that besides 

 a smooth -surfaced egg he has seen a faceted one ; which latter he supposes to be 

 ephippial. 



Length, ^ to ^ inch. Habitat. Berlin (Ehr.). 



ANUB2EA VALGA, Ehrenberg (42), (PL XXXIV. fig. 30). 



SP. CH. Lorica quadrate ; with six seines in front, of which the two mid-spines 

 are the longest, and two unequal spines behind ; dorsal and anterior portion of ventral 

 plate rough, the former also tessellated. 



Another species resembling aculeata. Ehrenberg says, however, that the teeth in 

 its uncus are five in number, while those in aculeata are many. The gastric glands 

 are egg-shaped ; and the red eye, transversely oval. 



Length, 2 \~G inch. Habitat. Berlin (Ehr.). 



ANURZEA SCHISTA, Gosse (171), (PL XXXI. fig. 55). 



[SP. CH. Lorica oblong, tapering to a short spine behind ; dorsal plate tessellated 

 in polygonal areas on each side of a mesial ridge, and punctured ; ventral plate much 

 shorter, produced into a projecting sharp point, divided from the dorsal by a deep cleft. 



It has relations with stipitata and cochlearis ; in tessellation agreeing with the latter, 

 and with tec ta. The anterior spines are straight. It is evidently an approach to 

 Notholca, but I do not see the ridges and furrows descending from the spines. The 

 tessellse are somewhat coarse and ill-defined. The straight short antlers, and the great 

 descending point of the ventral plate, distinguish it at once from every known species. 

 This point is a stiff taper spine : sometimes it projects obliquely (b) ; then, in 

 a moment it is jerked in, so as to be quite hidden, only to be as rapidly thrown out 

 again. Even in a dorsal view it can be clearly seen, through the transparent tissues. 

 I believe I have seen, on two occasions, a discharged egg, carried under the belly, in the 

 manner of tecta, &c. The eye is a ball of deep red, of enormous size. A very large 

 contractile vesicle, when full, forces up the other viscera to the middle of the body : 

 when, often, the well-defined contrast between the dark turbid contents of the intestine, 

 and the crystal clearness of the bladder, is curious and striking. The bladder has no 

 effect on the ventral spine, whose movements are manifestly voluntary. It is a sprightly 

 active swimmer. 



Length, T ^ inch. Habitat. Birmingham. P.H.G.] 



A. LONGISTYLA, Schmarda (135) A. cochlearis (vol. ii. p. 124). 

 A. REGALIS, Imhof (179)=var. of A. aculeata (vol. ii. p. 123). 



A. INEEMIS, Ehrenberg (42); like Notholca acuminata, but without frontal spines; 

 and with a feeble bent lorica, and indistinct longitudinal strife: Ehrenberg only saw 

 one specimen, and it is difficult to say wliat it was. 



