246 
P. pseudosphyrænoides nov. spec. 
(Not represented by any adult specimen). 
D 10, A 28—29 (30), P?, V?, Vert 81—84. 
Ventrals placed in advance of dorsal fin. 
The following measurements have been taken from one of the 
larger postlarval specimens of both species. 
P. pseudosphyrænoides. P. sphyrænoides. 
behem ofhend SR ES, mm AG un 
Fersk Of Spot ØE 20 
Height of head == 
Greatest hejsht SR EEN 2.19 
Smallest helshE sr SE eN hør 009 3 
Predorsal distante 0 SEE Mar 211.55 
PE 0. 22.0 » 
reanal ea RE ARR RR RR Pa USER 19.5, 
Distance from snout to front of anal fin — 28.5 , 29,0 » 
Length of dorsal fin at base .....:. SHE La 
Eeligth ok ank RS NG SR 5.9 » 
I have proposed the name P, pseudosphyrænoides for this 
species in order to suggest that it is closely related to P. sphy- 
rænoides Risso, differing, however, in several features from this 
species as shown by the above data. The most striking difference 
lies in the length of the head or more particularly in that of the 
snout. In P. pseudosphyrænoides the length of the snout in 0/0 
of total length is 9—10, in P. sphyrænoides 5—6, this holding 
good for the older postlarval stages, 3—4 cm in length. Besides, 
the numbers of vertebræ are different as shown by the following 
figures. 
P. pseudosphyrænoides. P. sphyrænoides. 
Number of vert. Number of specimens Number of vert. Number of specimens 
4 91 18 
83 14 90 27 
82 12 89 8 
81 3 Average number of vertebræ 
—— 90:15: i 
Average number of vertebræ 
2.48. 
The new species has been met with both in the Mediterranean 
and in the Atlantic. 
28—1—18. 
