DESCEirXION OF ENGBAVINGS. 



691 



PLATE X. 



irFigs.425* 4 6. Cycloglcna lupus ' 

 427 to 429. Theorus vernalis 

 430 to 433. Lepadflla ovalis 

 434 to 437.MouostylaquaclridL'ntata 

 438 to 410. ]S[astigo('eiTa carinata 

 441 to 444. Euuhlauis ? triquctra 



445, 446. lynceus 



447 to 453. Salpina mucronata 



Figs 



454 to 456. Dinochavis pocillum 

 457 to 459. Monura diilcis 

 4f)0 to 462. Colurus dcfluxua 

 463 to 465. Mct(ipiilia lapidclla 

 466, 4(57. Stephanops lainullaris 

 4G8, 4()y. Squami'lla obloiiga 

 470 to 473. Callidiua ulegaus 



PLATE XI. 



Fi". 474.. Hydrias comigera 



Group 475 Typhlina viridis 



Figs. 476 to 480. Rotifer vulgaris ' 



481 to 481. Actinurus Neptuuius 



485. 486. Mouolabis conica 



487 to 48i>. Philodina aculeata 



^gQ Roseola 



Fio-3. 491 to 494. Noteus quadi-icornis 

 " 495 to 497. Anuraea squaraida 



.J98. slipitata 



499 to 501 . Bracliionuspolyacanthus 

 502 to504.Pti3rodiua patina 

 505. ■ clypuata 



PLATE XII. 



Figs. 506 to 509. Pyxidicula globator 

 ill, 515. Xanthitiium ? ramosum 



513* 514. ? ditfornie 



5J2 ^hii'sutum 



Fio-a. 516 to5l8. Campilodiscus?clypeus 

 ° 519 to 531. Spirillum Bryozoou 

 532, 533. Astasia navalis 

 Group 534. Gyges sanguineus 



PLATE XIII. 



T -11 • •• /T?nifc ^ "Flo- 1 A frond filled witli ondoclirome, 



Figs. 1 and 5. Clostenum L^^.^^^^"";, f f ^,^7^^^^^^^^ central suture. Fig. 5- 



and an empty one ly"^g^^,':'^\^* '^Xn eiiugated, and now empty fronds. 

 A spovanguxm lying .^^ ^ f,';^^^,gj^' ^F^ froud filled with eadochrome, 



2 and 6. Clostenums riola mii Rait. M. ^ ^^.^^^^ g_,j,^^ 



^;r^^ug3t;i^iof ^:rS, and an orUe^ar sporangium 



Ivino- between them, enveloped m mucus. 

 3. sLurastinim (Desmidium Fh.) e,j^^^^^^^ is seen, sun-ounded by 



4 Spirotsema condonsata (Halts)— lue spuai mmu u <,mrallv 



a mucous hyaline sheath, and its endochrome within lolled spuaUj . 

 7. Staurastrum (Dosmidium, f "••)r-;^",'|^^!""^3,- g Coniugatmg fronds ; the 



8 and ll.-Docidium, Ehrenbergii (^'^fO-rig- 1:^ ^i^gows the process of 



sporangium in an early stage of development, i lo- i , 



9 D::£riv£'(Rali^)-The granular vesicles at the extremities are 

 lOailmluastrumpectinatum (Ralfs.)-Fig. 10. A single fr-ond. Fig. 30. 



The spinous sporangiimi. ^^.^^^ ^^^^^ ^ 13^ a 



12 and 13. Tetmemorus Brebissomi (itaus.; n^ i-^, «• 



side view. /Tj IP, \ -pstr 11 n front view ; fig. 15, aside 



of the sporangium' between them by their conjugation. 



