346 F. R. C. Reed — Fauna of L. Devonian of Torquay. 



it is difficult to make out the characters of the front of the head- 

 shield, the left-hand side of which is missing as well as the greater 

 part of the free cheek and lateral margin of the right side. The ends 

 of the thoracic pleura3 are also broken off, and th.Q lateral lobes 

 of the pygidium are not preserved. The whole specimen has also 

 been flattened out by pressure, but it seems that it naturally 

 possessed an almost complete absence of transverse convexity, 

 and that the trilobation was indistinct or nearly obsolete. The 

 affinities of the species seem to lie with that group of species of the 

 subgenus Parahomalonotus ^ which comprises H. lamcauda Quenst.,^ 

 H. -planus Sandb., and H. ohtusus Sandb., as defined by Koch 

 (op. cit.). The pygidium from the " Hauptquartzit " figured by 

 Kayser^ as H. multlcostatus Koch, appears to bear a close 

 resemblance to our specimen. 



Dalmanites {Asteroinjge) laciniatus {F\,oem.ex) . 



1844. CrypJtceus laciniatiis F. Roemer Pvhein. Uebergangsgeb., p. 82, t. ii, 



fig. 8. . 

 1889. Cri/nJuEUS laciniatus Kayser, Abh. k. preuss, geol. Landesanst., N.F., 

 ^ Heft i, p. 88, t. xxiv, figs. 1-8 (? 9, 10). 



In the Sedgwick Museum there is the impression of the left half 

 aiid posterior end of a somewhat distorted pygidium (S. 1) from the 

 Red Beds of the New Cut, Torquay, which precisely agrees with 

 Kayser's definition and figures of the common form of " Cryphceus " 

 laciniatus Roem., from Daleiden. The five lateral spines and the 

 much broader, but shorter, flattened, sublanceolate median posterior 

 spine are well seen, though the first lateral spine is almost entirely 

 broken off in our specimen. Another smaller example in the same 

 collection and from the same locality has lost the first two spines 

 on the left side, but shows the whole posterior part of the pygidium, 

 including the lateral lobe and last spine of the right side. The 

 characters of the axis and pleura3 agree with Kayser's definition. 

 There is also one fairly well preserved head-shield (S. 2) in the 

 Sedgwick Museum, likewise from New Cut, showing the eyes, 

 glabella, and part of the right cheek, and another left free cheek 

 (somewhat crushed), with the genal spine attached. The number 

 of rows of lenses in the eye in this specimen is about 27, and none of 

 the rows appear to consist of more than eight lenses. These 

 fragments of the head-shield do not differ from Kayser's description 

 of the common form of the species, but much confusion has arisen 

 from the dift'ereut applications of the specific name laciniatus, so 

 that it is necessary to limit the synonyiny which is frequently given. 

 Probably the trilobite from Torquay, which Salter * termed Phacops 

 (Cryphceus) punctatus (Stein.), should be referred to this species, 

 but on the other hand the specimens from Liskeard which he figured 



1 Reed, Geol. Mag.. 1918, p. 326. 



2 Koch, op. cifc., p. 55, t. viii, figs. 1-7. 



^' Kavser, Abhandl. geol. preuss. Landesanst., N. F., i, 1889, p. 80, t. xi, fig. 2. 

 * Salter, Men. Brit. Trilob., 1864, p. 59. 



