26 
CATALOGUE OF CEPHALOPODA. 
*** The upper Arms longest ; rest gradually shorter , to the lowest . 
4. Philonexis hyalinus. 
Body short, broad, smooth, oval, larger before than behind ; aper- 
ture very large ; diaphanous, whitish, marked with red. Head 
short. Eyes large, prominent, subpedunculated. Arms un- 
equal, not webbed, as long as the body; order of length, 1, 2, 3, 4 ; 
upper much longer than the lower. 
Octopus hyalinus Rang , Feruss . et D’ Orb. Mon. Ceph. Cryptod . 
Poulpes , t. 16. f. 1. 1835 ; Rang , Mag. de Zool. 1837, cl. v. 66. 
t. 92. 1837. 
Philonexis hyalinus B' Orb. Mon. Ceph. Acet. 104., Poulpes , t. 16. 
f. 113. 1838, Moll. Viv . et Fos. i. 205, 1845. 
Hob. Atlantic Ocean. 
**** The Arms very long, free, very slender . Cups far apart. 
5. Philonexis tuberculatus. 
Body oval, pointed behind, very large, smooth above ; beneath co- 
vered with small, short, horny tubercles, united by netted ridges ; 
aperture very large. Head short, not very distinct ; water-bearing 
apertures four, two above and two below. Arms slender, elon- 
gate, nearly equal ; comparative length, 1, 4, 2, 3 ; scarcely webbed. 
Cups distant, united in each line by an intermediate membrane. 
Siphuncle very large, larger than the head. — Brown, silvery 
beneath ; arm bluish. 
Octopus tuberculatus Risso , Hist. Nat. Fur. Merid. iv. 3. n. 4. 
1826 ; Belle Chiaje , Mem. iv. 55, 56. t. 55. n. 3. 1832 Mem. 
sur TAplysia , p. 68. note. 
Octopus reticularis Petagna , Rappelle delle Sc. di Napoli , 1826 
(1828). 
Octopus catenulatus Ferussac , Poulpes , t. 6. 6*. 6**. 1828. 
Octopus Yerany Wagner , Zeitschr. fur die Org. Phys. ii. 1828, 
Bullet. JJniv. des Sc. Nat. xix. 388. n. 3. 
Polpo di Ferussac Belle Chiaje , Mem. iv. 41. 1829. 
Octopus pictus Blainv. Faun. Franq. Moll. 8. n. 6. from Bisso. 
Philonexis tuberculatus B' Orb. Mon. des Ceph. Acet. 87., Poulpes , 
t. 6. 6*. t. 23. 1838, Moll. Viv. et Fos. i. 206. t. 5. f. 2 — 6. 
1845. 
Hab. Mediterranean. 
6. Philonexis Alcjeus. 
Body smooth above and below ; brown spotted. Arms elongate, 
slender, free ; the upper and lower pairs very long ; the two 
lateral pairs much shorter. Cups far apart. 
