INDEX. 507 
Pedicellina cernua, var. glabra, Sars, 
mentioned, 252: 
gracilis, Levinsen, 251. 
hirsuta, Jullien, mentioned, 252. 
Pennaria symmetrica, Clark, 81. 
Pennariide, 81. 
Pentaceros Lincki, Blainv., mentioned, 9. 
Perenon planissimum (Herbst), 416. 
Pericera, Latr., 431. 
Perigonimus, Sars, colony, mentioned, 88. 
vagans, Thornely *, 81; mentioned, 85. 
Perinea tumida, Dana, 410. 
Peronodoris, Bergh, 113, 114; mentioned, 
114, 116. : 
cancellata, Bergh, 114; mentioned, 
86, 116. 
denticulata, Hot *, 114, 115; men- 
tioned, 86, 87, 114. 
Persephona, Leach, 428. 
affinis, Bell, 409. 
fugax (Fabr.), Rathbun, 428; distrib., 
409, 420. 
kessleri, Pauls., 409. 
pentacantha, Alc., 428. 
Persian Gulf, Crustacea, 409-416. 
Petrolisthes, Stimp., 262. 
bosci, Aud., 262. 
dentatus, Stimp., 262. 
lamarcki (Leach) Stimp., 262. 
var. dentatus, zddell, men- 
tioned, 262. 
var. rufescens (Heller) Borrad., 
mentioned, 262. 
leptocheles, Heller, 263. 
rufescens (Heller), 262. 
Petroscirtes ancylodon, Riipp., 485. 
mekranensis, Regan, 483. 
mitratus, Repp., 485. 
Pheophycee, 78, 402; mentioned, 401. 
Phakellia donnani, Bowerb., 357, 390, 396, 
400; mentioned, 290, 558, 382. 
palmata, Row *, 357, 590, 396, 400; 
mentioned, 290; fig., 558. 
Pharetronide, 192, 210, 585. 
Pherusa, Zamv., mentioned, 238, 240, 246. 
Phialodoris podotria, Bergh,mentioned, 116. 
Philyra rectangularis, Mzers, 410. 
seabriuscula (Fabr.), 410. 
variegata (Riipp.), 410. 
Phyllidia varicosa, Zam., 120; mentioned, 
87. 
Phyllospongia, Hh/ers, mentioned, 281. 
cordifolia, eller, 378, 391, 397; 
mentioned, 290. 
foliascens ( Pall.) Lendenfeld, 391, 397. 
madagascariensis, Hyatt, 378, 391, 
397 ; mentioned, 290, 382. 
otahitica, Hyatt, 391, 897 ; mentioned, 
382. 
pennatula, Lendenf., 379. 
perforata, Hyatt, 391, 3897. 
radiata, Hyatt, 379, 396, 397; men- 
tioned, 290, 382. 
Phyllospongiide, 283. 
Phylosiphonia clavata, Keller, 389, 395. 
conica, Kedler, 588, 395. 
intermedia, Lendenf., 388, 395. 
pumila, Keller, 326. 
pumila, Lendenf., 326. 
vasseli, Keller, 389, 399. 
Phymodius, 4d. M.-Idw., 450. 
eranulatus ( Targ.-Tozz.), 414. 
monticulosus, Alc., 450. 
obscurus, Rathbun, 450. 
sculptus (4. M.-Edw.), 450; distrib., 
414, 491; growth-change, 408. 
ungulatus (H. W.-Edw.), 450; distrib., 
414, 491. 
Pilochrota haeckeli, Sol/as, mentioned, 
294, 295. 
lendenfeldi, Sovl/as, mentioned, 294, 
295. 
pachydermata, Sollas, mentioned, 294, 
295. 
parva, fow *, 298, 386, 393; men- 
tioned, 289, 294, 295, 399. 
variabilis, Wilson, mentioned, 294, 
295. 
Pilodius armiger, Nob., 414. 
Martensi (A7auss), 414. 
pugil, Dana, 414. 
Pilumnus, Leach, 458. 
asper (Ztéipp.), 414. 
brachytrichus, Kossm., 414. 
eudzemoneus, Nod., 414. 
forskalii, H. M.-Edw., 414. 
hirsutus, Stzmp., 414. 
levimanus, Dane, 414. 
propinquus, NVod., 458; distrib., 414, 
421. 
quadridentatus, de Man, 414. 
savignyl, Heller, 414. 
