PLATE XXXT. 



Figure 1. Poli/niorphina cuspidata II. P.. Brady var. mslnlula ('uslinian, n. var. Front view of tx-pe specimen, v 125. 

 Station (;4")2, Mint Spring ISayou, Vickslnu'g, Miss. 



2. Polymorpliina rirlshiiriiriisis Cushman, n. sp. Front view of type specimen, ■: 125. Station 0451, Mint 



Spring liayon, Vicksl)urg, Miss. 



3. Polymor pill III! npmlix IVOrhigny. Front view, "• 125. Station CMS, (ilass Hayou, Vickslmrg, Miss. 



4. PohiviorpJiiiiii iiiliriKi Cushman, n. sp. Front view of type specimen, < 125. Station 0451, Mint Spring 



Bayou, Vickslmrg, Miss. 



5. Poh/iiiorphiiiu spinom D'Orliiguy, X 125. Station 7071, ■Brown's ('a\e," Leaf River, Miss. 



6. Crislellaiia lirMiiirijninia Cus]\nv3.n, n. sp. Side view of type specimen, • 100. Station 0047, f'hickasaw- 



hay River 1 ', miles southwest of lioice. Miss. 



7. CristcUari'i liii-shiin/ruxif! Cuslnnan, n. sp. Side view of more complete specimen, X lOU. Statiiai 7071, 



"Brown's Cave," Leaf River, Miss. 



8. Cn's;<7Mn''M-////m/(; O'ontfiirt) Barker aii<l .Tones. Side\iew. • 50. Station 7071, " Brown's Cave," Leaf 



River, Miss. 



9. PnlclJiiia aihruii Cuslmian, n. sp. Dorsal view of type specimen, X 1-5. Station 0452, Mint Spring Bayou, 



^'icksl■>urg, Miss. 

 148 



