6 Transactions of the Society. 



examined eight or ten examples, all from the canal, Smallheath, Bir- 

 mingham. (Fig- 18.) 



19. SaJi^ina marina. Occipital spines two, procurved ; pectoral 

 two, short ; lumbar spine short, deep ; alvines stout, separated from the 

 lumbar by an angular sulcus. Length of lorica, from points to points, 

 1/136 in." Marine. 



This large species was taken in a tide-pool in the Firth of Tay ; the 

 first Salpina found in the sea. Its anterior armature is that of 

 S. mucroriata, but the posterior is peculiar, in that the alvines are stout, 

 nearly straight spines, and that the sinus which divides each from the 

 lumbar point is not rounded, but makes two sides of a rhomboid, with 

 definite angles. The specimen was dead when I found it. (Fig. 19.) 



20. Diaschiza (?) 7-hami)liigera. Lorica elliptical in outline, viewed 

 dorsally ; highly gibbous, viewed laterally ; venter flat : toes stout, long, 

 decurved : trophi projecting in form of a bird's beak. Length 1/173 in. 

 Lacustrine. 



The front terminates in an acute hooked beak, which is found to be 

 the extremity of the trophi, and apparently of the incus protruded. 

 The whole manducatory apparatus is of unusual dimensions, especially 

 the fulcrum of the incus. (Fig. 20, i, represents the trophi seen 

 dorsally ; j, laterally.) I have not distinctly seen the dorsal cleft ; 

 but the line which passes along the back, at some distance from the edge, 

 I presume to indicate the bottom of such a cleft ; if it is not the base of 

 a high carina. Two examples occurred together in water from one of 

 my window tanks. (Fig. 20.) 



21. Colurus DumnorAus. Lorica in dorsal aspect a very broad 

 oval, produced behind into two rather short points, separated by a wide 

 but shallow sinus : the ventral line deepens in the middle ; the ventral 

 cleft extends around the front to the occiput : foot robust, with two 

 moderately stout, separable toes. Length 1/260 in. Marine. 



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

 much studded with Licmoi^liorege, from tide-pools at Paignton, near 

 Torquay. One of these had the sides much more parallel than the 

 others. A large pale red eye is conspicuous. All had the habit of 

 pivoting on the toe-tips, jerking and posturing. (Fig. 21.) 



22. Colurus dicentrus. 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. Length 1/185 in. 

 Marine. 



I 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. 22, I) is constant, thus ditfering from C. amhly- 

 telus and C. (jraJlator. The tail-points resemble rose-prickles. The 

 appressed toes seem a single slender spine, but are often thrown apart. 

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

 (Fig. 22.) 



23. Colurus grallator. Lorica much compressed; lateral outhne 

 ovate, sub-square behind, without points : toes half as long as lorica, 

 very slender, straight, readily separated : ventral cleft slightly narrowed 

 m the middle. Length 1/250 in. Marine. 



