COLUllID.E. 45 



margin. The spindlc-sliaped foot ends in a tapering, finely pointed, claw, and is the 

 really characteristic point in the animal's shape. Its " triangular " teeth are, I fear, due 

 to imperfect observation. No further details are given. 



Length, iri-jj inch. Habitat. Freshwater, Quito (Schmarda). 

 M. MACEOGNATHA aud M. ooPHTHALMA, Schmarda (135). See note 1, Sup', p. 8. 



CoLUEUs DuMNONius, Gosse (169), (PL XXXI. fig. 44). 



[SP. CH. Lorica in dorsal aspect a very broad oval, produced behind into ttvo rather 

 short points, separated by a wide hut shallow sinus ; the ventral line deepens in the 

 middle ; the ventral cleft extends around the front to the occiput ; foot robust, ivith two 

 moderately stout, separable toes. 



Three examples I have seen at different times among fine conferva, much studded 

 with LicmophorecB, from tide-pools at Paignton, near Torquay. One of these bad the 

 sides much more parallel than the other. A large pale red eye is conspicuous. All bad 

 the habit of pivoting on the toe-tips, jerking and posturing. 



Length, o^^ inch. Habitat. Marine ; Paignton. P.H.G.] 



COLURUS DICENTEUS, Gossc (109), (PI. XXXI. fig. 42). 



[SP. CH. Lorica ovato-fusiform ; body ending behind in a minute tail of two hooks 

 adnate at their base; foot stout; toes long, very slender, more or less decurved 

 throughout. 



1 have examined nearly a score of individuals, and am satisfied that this is a true 

 species, in which the peculiar termination of the body (shown enlarged in fig. b) is 

 constant, thus differing from C. amblytelus and C. graUator. The tail-points resemble 

 rose-prickles. The appressed toes seem a single slender spine, but are often thro\via 

 apart. Two red eyes are distinct. It is not rare m the Tay tide-pools. 



Length, yij inch. Habitat. Tay tide-pools. P.H.G.] 



CoLUEUs GEALLATOE, Gossc (169), (PL XXXI. fig. 43). 



[SP. CH. Lorica much compressed ; lateral outline ovate, sub-square behind, 

 rcithout points ; toes half as long as lorica, very slender, straight, readily separated ; 

 ventral cleft slightly narrowed in the middle. 



Nearly related to the preceding ; but the outline, \'iewed dorsally, is longer and 

 narrower ; there is no p)rotrusion of the body behind the lorica ; and the toes are quite 

 straight. The frontal hook is unusually narrow. I have not been sure of an eye. A 

 dozen examples have occurred from the Tay tide-pools. 



Length, ^ijf inch. Habitat. Tay tide-pools. P.H.G.] 



CoLUEUS MICEOMELA, GosSC (PI. XXXI. fig. 45). 

 Mmiura micromela Gosse (1G9). 



[SP. CH. Lorica in dorsal aspect broadly ovate, produced behind into slightly 

 projecting points, separated by a shallow roimided sinus ; in lateral aspect the quadrant 

 of an oval ; foot small ; toes of uniform excessive tenuity. 



I have had, for thirty-six years, drawings of a species which I had marked (with 

 "?") as Monura dxdcis. Very recently, in water fi'om Slough, what seems the same 

 form, now figured, has occurred, and that repeatedly. The excessive tenuity of the toes ' 

 is the most striking feature ; and then the round sinus between the lorica-points. No 

 eye is visible. The general figure is that of Col. hicuspidatus. 



Length, ^J^ inch. Habitat. Lacustrine. P.H.G.] 



' In page 367 of the Journ. Roy. Mia: Soc, 1837, Mr. Gosse says "I have seen the toes widely ex- 

 pamled. The species must therefore be transferred to Coliirus." 



