and Acajjulco Sponges. 



HOLORHAPHIDOTA. 



Hcalichondriapanicea, JbA«s<.,p.282. Reniera digitata, Sdt,, p. 287, 



Isodictja simulaus, Johnst., p. 282. Phorbas amaranthus, p. 287. 



Thalysias repens, de F. et M., Esperia Ijevis, n. sp., p. 291, 



p, 282, Suberites ? sp., agglomerated with 



carbonaria, Lam., p. 282. sliell-detiitus, p. 350, 



Fibularia massa, n. sp., p. 282. Cliona caribbaea, n. sp., p, 346. 



ramosa, n. sp., p. 283. Terpios fugax, de F. et 31., p. 3o5, 



ancborata, n, sp., p. 283. Donatia lyncurium, Nardo, p. 359. 



Halichondria birotulata, IIi(j(jin, Geodia gibberosa, Lam., :=G. tu- 



Aun. 1877, vol. xix. p. 290. mulosa, Bh., p. 302. 

 isodictjalis, n. sp., p. 285. 



List of Sponges dredged by Gapt. W. H. Cawne Warren in 

 the Harbour of Acapulco &c. in 4-9 fathoms , July 1880, 

 submitted for examination at the same time. 



Tuba acapulcoensis, n. sp., p. 279. Halichondria pustulosa (South At- 

 Reniera fibulata, Sdt., p. 284. lantic Ocean), n. sp., p, 285. 



Halichondria isodictyalis, p. 285. Donatia multifida, n. sp., p. 358, 



EXPLANATION OF THE PLATES. 



Note. — All the spicules, with the exception of figs, 81 and 32, are 

 drawn to a scale of l-48th to 1-OOOOth of an inch, that their relative sizes 

 may be seen ; but tigs. 31 and 32, being of a much larger size, are, for 

 convenience, drawn to a scale of l-48th to l-l800th inch. The "more 

 magnified " views of the smaller spicules are upon no scale at all, but in- 

 tended to show in a larger form that which cannot be well shown in a 

 smaller representation. 



Platk XL 



Fiy. 1. Halichondria pustulosa, n. sp. (nat. size), a a, pustuliform emi- 

 nences ; h, the same, more magnified ; c, skeletal spicule, long ; 

 d, subskeletal spicule, smooth ; (', subskeletal spicule, short, spined ; 

 /, ancliorate, front and lateral views ; <j, bihaniate. 



Fiy. 2. Halichondria isudictjalis, n. sp. a, .skeletal .spicule; 6, tibiella; 

 c, ancliorate, front and lateral views ; d, bihaniate ; e, anchorate, 

 more magnified, front and lateral views. 



Fiy. 3. Reniera diyitata, Sdt. a, skeletal spicule ; b, tibiella ; c, micro- 

 spined acerate. 



Fiy. 4. Tuba lincata, spicule of. 



Fig. 5. Tuba digitalis, spicule of. 



Fig. 6. Tuba anniyera, .spicule of. 



Fig. 7. Chaliita rubens, spicule of. a, point, more magnified. 



Fig. 8. Halichondria 2^anicea, Johnst. (Amorphiiia, Sdt.), spicule of. 



Fig. 9. Isodictya simulans, Bk, (^Halichondria, Johnst.), spicule of. a, 

 pohit, more magnified. 



Fig. 10. Thalysias repens, var. nov., spicule of. a, point, more magnified. 



Fig. 11, 77ifl/^s?'rts c«/'6o«rtna, Lam,, spicule of. «, point, more magnified. 



Fig. 12, Fibularia ranwsa, u. sp. a, skeletal spicule ; b, bihamates. 



Fiy. 13. Fibularia )na.ssa, n. sp. a, skeletal spicule ; b, small acerate ; 

 c, bundle of tiichites; d, bihamates. 



