PASIPH AA. 
ALPHAUS, Risso. 
PASIPHAMA, Savigny, Leach, Risso. 
Antenne externe subtus internas locate. 
Antenne interne pedunculo attenuato, setis filiformibus duabus inzequalibus. 
Palpi pediformes elongati ad basim, squama laminata muniti. 
Pedum paria primo et secundo didactyla; paria 3, 4, 5 attenuata, monodacty la. 
Testa elongata, lateraliter compressa, anticé angustata. 
Abdomen 6-articulatum, elongatissimum, valde compressum. 
Cauda pentaphylla, lamellis lateralibus angustis. 
External antenne placed beneath the internal, which have an attenuated peduncle with two 
filiform unequal sete. Pedipalps long, with a laminated scale at the base. First and second 
pairs of feet didactyle; third, fourth and fifth pairs attenuated and monodactyle. Carapace 
elongated, laterally compressed, narrow in front. Abdomen 6-jointed, very long, much com- 
pressed. ‘Tail five-flapped, side-flaps narrow. 
PASIPHHA SIVADO. 
PTGS a: 
P. rostro parvo, acute dentiformi; laminis externis caude quam interne longioribus. 
Pasiphzea sivado, Risso, Crust. Nice, t. III. f. 4. Latreille, Regne Anim. Cuv. LV. p. 99.. 
Pasipheea Savignyi, Leach. MS. in Brit. Mus. 
Fig. 3, Pasipheea Sivado. 
The first British specimen seen by the author (Dr. Leach) was in a collection of British 
Crustacea formed by Mr. J. Sowerby in his Museum at Lambeth. Others were afterwards 
obtained from Mr. Baker and Mr. Macandrew, taken in the Irish and Bristol Channels, and placed 
in Dr. Leach’s private collection. The specimen stated to have been in the British Museum under 
the name of P. Savignyi in the Doctor’s hand-writing, is probably the same as now appears there 
correctly labelled, P. Sivado. Dr. Leach probably did not notice the description by Risso, or 
seeing it was uncertain about the identity of the species. 
