MUSEUM OF COMPARATIVE ZOOLOGY. 75 



Fig. 446. Ophiocreas cedipus, arni-joiut near tip of ai'in ; \. 



Fig. 447. Ophioglypha meridionalis, below ; 5J. 

 Fig. 448. " " above ; J. 



Fig. 449. " " arm -joints ; $. 



PLATE XVII. 



' Fig. 450. AstroscTiema tumidum, below ; |. 



Fig. 451. " ** above ; i 



Fig. 452. " " arm-joint near base of arm ; |. 



Fig. 453. " ** arm-joint near tip of arm ; ^. 



Fig. 454. " rubrum, below; ^. 



Fig. 455. " •* above ; t 



Fig. 456. " " arm-joint near base of arm ; {. 



Fig. 457. " " arm-joint near tip of arm ; {. 



Fig. 458. *' horriduin, below ; f. 



Fig. 459. " " above ; I. 



Fig. 460. " *' near base of arm; ^. 



Fig. 461. " " near tip of arm ; |. 



Fig. 462. " hrachiatum, below; -|. 



Fig. 463. " •' above ; |. • 



Fig. 464. " ** near base of arm ; f-. 



Fig. 465. " " near tip of arm ; |. 



Fig. 466. " faZicc, below. Grains on sides of moutli-angles too large ; ?. 



Fig. 467. ** " above ; f. 



Fig. 468. " " near base of arm ; J. 



Fig. 469. " " near tip of arm ; i. 

 Fig. 470. Ophiocfi'eas ahysswola, below ; 5« 



Fig. 471. " " above ; I. 



Fig. 472. " " near base of arm ; 5- 



Fig. 473. *' " near tip of arm ; i. 



Plate XVIII. 



Fig. 474. Astrotoma Murrayi, below ; \. 



Fig. 475. " '« above ; i 



Fig. 476. " « arm-joints ; \. 



Fig. 477. Astroccras perg'imena, below; |. 



Fig. 478. " " above; ^ 



Fig. 479. " " near base of arm ; §. 



Fig. 480. " " near tip of arm ; f . 



Fig. 481. Astroclon propugnatoris, below; \. 



Fig. 482. '« " above ; \. 



Fig. 483. " « profile ; \. 



Fig. 484. " " near base of arm ; i. 



Fig. 485. " " beyond 1st fork ; \. 



Fig. 486. " " tip of twig ; {. 



