22 



SAN DIEGO SOCIETY OE NATURAL HISTORY 



CLARKE (J. M.) and RUEDEMANN (R.)— Continued 



subgenus proposed for this 



(Onychopicrus) Kokomoetisis Miller and (jurle\'. This 

 specief. 



The authors classify Euryplrriis Boylci Whiteaves under a new subgenus Tylopterus. 



Eurypterus ( Antliraconectes) ina&onensis Meek and Worthen. Elisor cus Grote and 

 Pitt. Eusan us siorpionis Grote and Pitt. The authors refer /;'. grarulis ti. & P. to this 

 species. Eusarcus neivlini Claypjle. The authors refer Eurysotna newlirii and Carci/i- 

 osoma ne^ulin'i Claypole to this species. Eusarcus ? c'lcerops Clarke, E. ? longiceps nov., 

 E. triangulatus nov. Dnliclio uterus macrocliirus Hall, D. jnuikfortens'is nov., D. lati- 

 frons nov., D. otisius Clarle, originally described under the genus pterygotus ; D. 

 siluriifps no\-., the Eusarcus scorp'iouis Pohhnan, 1S86, D. testudineus nov., D. stylonur- 

 aides nov. 



Cjenus Styl'jriurus Page The authors illustrate S. 

 elegans Laurie and S. logani Woodward, also S. 

 Tnacroplitlialmus Laurie. Tliey divided the genus 

 into subgenera. 



(A) Stylonurus type S. logani Woodward, etc. 



(B) Ctenopterus type Stylonurus cestrotus Clarke, 

 etc. 



(C) Tarsopterus type S. scoticus Woodward. 



Stylonurus (Ctenopterus) excelsior Hall 



The author refers Dolichocepliala lacoana Clay- 

 pole, 1883, and S. lacoaniis Beecher, 190(1, to this 

 species. 



(Drepanopterus) type S. lobatus Laurie. 



Stylonurus liinbalus nov., S. (Ctenopterus) miil- 

 tispinosus nov., S. myops Clarke. Stylonurus heccheri 

 Hall, described as Eurypterus heecheri, Hall, 1884; 

 S. ivriglitianus Dawson, described as Equisetides 

 ivrightiana Dawson, 1881. Subgenus Drepanopterus 

 Laurie. The authors figure D. pentlandicus Laurie, 

 D. longigaudatus nov. 



Ecliinognatlius Walcott, E. cle-velandi Waicott. 



Megalograptus Miller, M. ^velclii S. A. Miller. 

 This was described as a Graptolite by Miller, 1874. 



Family Pterygotidae : 



Genus Hughmillcria Sarle, 19U2, //. socialis Sarle and var. rohusla. II. magna nov., 

 77. s/iaivangunk Clarke. 



Pterygotus Agassiz : 



The authors figure a restoration of Stylonurus po-zceiei and Pterygotus angelicus, fig. 

 70. Describe and illustrate Pterygotus macrophtlialmus Hall, to which they refer P. 

 osborni Hall, 7^ atlanticus nov., 7*. buffaloensis, Pohlman emend. The authors refer 

 P. cummingsi Grote and Pitt, 1877, P. acuticaudatus Pohlman, 1881, P. quadraticaudatus 

 Pohlman, P. macrophtlialmus Pohlman, 1881, and 7-'. bilobus (Huxley and Salter) 

 Pohlman, 1881, to this species. Pterygotus cobbi Hall, 7". (Erettopierus) glubiceps nov., 

 P. (Erettopterus) gandis Pohlman emend. 



This is the Ceratiocaris grandis Pohlman, 1883, P. monroensis Sarle, P. (Eusarcus) 

 nasutus nov., 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 Wliitfield. 



Stylonurus Logani Jf'oodv.'ard 



