F. R. Coivper Reed — Salter's Undescribed Species. 109 



la the upper mass of closely packed plates only the minute pits and 

 granulations are visible. These upper plates appear to be triangular 

 and to bear a carina. 



Remarks. — It is extremely doubtful if this fossil is the remains 

 of a crustacean, and it has been suggested with much probability 

 that it represents the column of one of the Anomalocystidaj.' The 

 supposed shape of the plates in the double row cannot be regarded as 

 of much value, owing to their imperfect condition. It is unfortunate 

 that Salter chose to attach a specific name to such exceedingly 

 unsatisfactory specimens. 



GASTEROPODA. 



SuBULiTES PUPA, Salter. (PI. VIT, Fig. 5.) 



1873. Ilacrochelltis pupn, Salter : Cat. Camb. Sil. Foss. Woodw. Mus., p. 156 



(a 869). 

 1891. Macrochiliim pupa, Woods: Cat. Type Foss. Woodw. Mus., p. 106. 



There is one specimen in the Woodwardian Museum from the 

 Wenlock Limestone of Dudley (Fletcher Collection), labelled 

 Macrocheiliis pupa (a 869) by Salter. Only the three lower 

 whorls are preserved, and these show no ornament ; the two apical 

 whorls are broken off. The shape of the mouth is also well seen. 

 The regulai', elongate, fusiform shell, the shallow suture-line, the 

 slight convexity of the whoi'ls and their want of ornamentation, 

 the large body-whorl, equal in length to about half the shell, and 

 the narrow elongate apertui'e, interiorly acuminate, show that it is 

 comparable to Subidites ventricosus (Hall),^ described and figured 

 also from the Wenlock of Sweden by Lindstrora.' It cannot be 

 assigned to the genus Macrochilina, on account of the shape and 

 characters of the mouth and the shallowness of the suture-line. This 

 species has also been found by Professor Hughes in the Lower 

 Llandovery of Blain y cwm. 



Measurements. 



mm. 



Length of specimen 35'0 



Estimated length when perfect 40-0 



Width of body-whorl 18-0 



Trochus cALYPTRiEA, Salter. (PI. VII, Fig. 4.) 



1873. Emmphalus calyptrcea, Salter: Cat. Camb. Sil. Foss., p. 157 (« 862). 

 1891. Euomphalm calyptrcea, Woods : Cat. Type Foss. Woodw. Mus., p. 103. 



The one small original specimen (a 862) from the Wenlock 

 Limestone of Dudley is all the material we possess. It is imperfect, 

 but the body-whorl is well preserved and shows the essential 

 features. 



Diagnosis.— Shell small, trochiform, obtusely conical, of several 

 whorls (probably four or five), which are sub-ventricose. The body- 

 whorl has an angulated, rather prominent umbilical edge, and its 

 umbilical surface is flattened at right angles to the rest of the whorl, 



1 H. Woodward: Geol. Mag., Dec. II, Vol. VII (1880), p. 193, PI. VI, and 

 Woodcut, Fig. 6, p. 197. 



2 Hall: Pal. N.Y., ii (1852), p. 347, pi. 83, fig. 7. 



» Lindstrom : Sil. Gastr. Pter.. Gotl., 1884, pp. 193, 194, pi. xv, fig?. 19-21. 



