18 F. CJtapman: 



South Wales specimens, as a rule, are smaller, than those from 

 Victoria; but some of the Buchan specimens are quite as small, 

 being veritable micromorphs, and agreeing in all their characters 

 with the Yass specimens. 



Victorian Localities for S. ya,ssensis. — Bindi, head of the 

 Tambo River ; Buchan. Murrindal River ; and Tabberabbera, 

 at the junction of the Mitchell and Wentworth Rivers. 



Description of Spirifer howitti, sp. nov. (PI. V., Figs. 4-6). 



Shell moderately well-inflated, compressed at the cardinal ex- 

 tremities ; sub-quadrate to sub-elliptical, the hinge-line varying 

 in proportion according to length of shell. The chief distinc- 

 tive characters are the strong plications, 6 to 8 on either side 

 of the median fold ; median fold with 2 strong plications, the 

 sinus with two weaker ones, sometimes nearly obsolete ; area 

 large ; ventral beak much elevated, pointed and only slightly in- 

 curved ; delthyrium large ; dental lamellae well-developed ; 

 unweathered specimens show conspicuous, concentric lamellae 

 on the shell surface. 



Measm-ements of three specimens expressed in millimetres : — 



A. B. C. 



This species falls into the section of the Lamellosi, having 

 a lamellated shell-surface. It apparently belongs to the S. 

 mucronatiis type of shell, so far as external characters go, de- 

 scribed by Conrad from the Hamilton Group (Middle Devonian) 

 of New York. 



S. howitti somewhat resembles in outline S. pittmani, lately 

 described by Mr. W. S. Dun from the Devonian of County 

 Cunningham, New South Wales.-^ That species, however, is one 

 of the ostiolate spirifers, and, further, is more numerously 

 plicated. 



Locality. — From the Middle Devonian limestone of Bindi, 

 Gippsland, Victoria. Presented by Dr. A. W. Howitt, by whose 



1 Records Geol. Surv. N.S.W., vol. vii., pt. IV., 1904, p. 320, pi. Ixi., figs. 4, 4.a, b. 



