22 SAN DIEGO SOCIETY OF NATURAL HISTORY 
(Onychopterus) Kokomoensis Miller and Gurley. This is subgenus proposed for this 
species. 
The authors classify Euryplerus Boylei Whiteaves under a new subgenus Tylopterus. 
Eurypterus (Anthraconectes) mazonensis Meek and Worthen. Eusarcus Grote and 
Pitt. Eusarcus scorpionis Grote and Pitt. The authors refer E. grandis G. & P. to this 
species. Eusarcus newlini Claypole. The authors refer Eurysoma newlini and Carcin- 
osoma newlini Claypole to this species. Eusarcus 2? cicerops Clarke, E. ? longiceps noy., 
E, triangulatus nov. Dolichopterus macrochirus Hall, D. frankfortensis nov., D. lati- 
frons nov., D. otisius Clarke, originally described under the genus pterygotus; D. 
siluriceps nov., the Eusarcus scorpionis Pohlman, 1886, D. testudineus nov., D. stylonur- 
oides nov. 
Genus Stylonurus Page. The authors illustrate S. 
elegans Laurie and S. logani Woodward, also 8. 
macrophthalmus Laurie. They divided the genus 
into subgenera. 
(A) Stylonurus type S. /ogani Woodward, ete. 
(B) Ctenopterus type Stylonurus cestrotus Clarke, 
etc. 
(C) Tarsopterus type 8. scoticus Woodward. 
Stylonurus (Ctenopterus) excelsior Hall.  ...... 
The author refers Dolichocephala lacoana Clay- 
pole, 1883, and 8. lacoanus Beecher, 1900, to this 
species. 
(Drepanopterus) type S. /obatus Laurie. 
Stylonurus limbatus nov., 8S. (Gtenopterus) mul- 
tispinosus noy., 8S. myops Clarke. Stylonurus beecheri 
Hall, described as Eurypterus beecheri, Hall, 1884; 
S. wrightianus Dawson, described as Equisetides 
wrightiana Dawson, 1881. Subgenus Drepanopterus 
Laurie. The authors figure D, pentlandicus Laurie, 
D. longigaudatus nov. 
Echinognathus Walcott, E. clevelandi Walcott. 
Megalograptus Miller, M. welchi S. A. Miller. 
This was described as a Graptolite by Miller, 1874. Stylonurus Logani Woodward 
Family Pterygotidae: 
Genus Hughmilleria Sarle, 1902, H. socialis Sarle and var. robusta, H. magna NOV., 
H. shawangunk Clarke. 
Pterygotus Agassiz: 
The authors figure a restoration of Stylonurus poweiei and Pterygotus angelicus, fig. 
70. Describe and illustrate Pterygotus macrophthalmus Hall, to which they refer P. 
oshorni Hall, P. atlanticus nov., P. buffaloensis, Pohlman emend. ‘The authors refer 
P. cummingsi Grote and Pitt, 1877, P. acuticaudatus Pohlman, 1881, P. guadraticaudatus 
Pohlman, P. macrophthalmus Pohlman, 1881, and P. bilobus (Huxley and Salter) 
Pohlman, 1881, to this species. Pterygotus cobbi Hall, P. (Erettopterus) globiceps nov., 
P. (Erettopterus) gandis Pohlman emend. 
This is the Ceratiocaris grandis Pohlman, 1883, P. monroensis Sarle, P. (Eusarcus) 
nasutus noyv., P. prolificus nov. 
Remarks on Beltina danai Walcott. 
The authors are not convinced that the fragments of this genus described are those 
of merostomatus. 
Note on Proscorpius osborni Whitfield. 
